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1988 Porsche 911 Turbo Cabriolet M505 Slant Nose

United States Lot # V-000185 Ended 92 Bids & Comments
Description Bids & Comments

Presentation

This 1988 Porsche 911 Turbo came specified in paint-to-sample Smoke Silver Metallic with M505 slant-nose bodywork, a limited-slip differential, and a leather-to-sample interior. The car is powered by a turbocharged 3.3-liter flat-six linked with a four-speed manual transaxle, and equipment includes 16″ Fuchs alloy wheels with body-color centers, four-wheel cross-drilled and ventilated disc brakes, a brown soft top, a tea-tray rear spoiler, power-adjustable seats with lumbar support, power windows, a Blaupunkt cassette stereo, and air conditioning. It was acquired by the seller in 2024, and work has since involved replacing the fuel pump, ignition components, front condenser blower motor, and fuel level sending unit. This M505 930 Turbo cabriolet is now offered with a Porsche Certificate of Authenticity, manufacturer’s literature, a binder of records, a tonneau cover, a tool kit, spare parts, two car covers, a trickle charger, a clean Carfax report, and a clean Tennessee title in the seller’s name.
1988 Porsche 911 Turbo Cabriolet M505 Slant Nose photo 2
This 1988 Porsche 911 Turbo came specified in paint-to-sample Smoke Silver Metallic with M505 slant-nose bodywork, a limited-slip differential, and a leather-to-sample interior. The car is powered by a turbocharged 3.3-liter flat-six linked with a four-speed manual transaxle, and equipment includes 16″ Fuchs alloy wheels with body-color centers, four-wheel cross-drilled and ventilated disc brakes, a brown soft top, a tea-tray rear spoiler, power-adjustable seats with lumbar support, power windows, a Blaupunkt cassette stereo, and air conditioning. It was acquired by the seller in 2024, and work has since involved replacing the fuel pump, ignition components, front condenser blower motor, and fuel level sending unit. This M505 930 Turbo cabriolet is now offered with a Porsche Certificate of Authenticity, manufacturer’s literature, a binder of records, a tonneau cover, a tool kit, spare parts, two car covers, a trickle charger, a clean Carfax report, and a clean Tennessee title in the seller’s name.
1988 Porsche 911 Turbo Cabriolet M505 Slant Nose photo 3
The car is finished in paint-to-sample Smoke Silver Metallic, a Mercedes-Benz color, and is equipped with factory flachbau bodywork (M505), a package that featured pop-up headlights, vented front fenders, side strakes, and extended side sills. Additional equipment includes a brown soft top, a tea-tray rear spoiler, and dual exhaust outlets. The rocker panels were refinished in 2015, and the windshield frame seal and several Tenax fasteners were replaced in 2025. Imperfections are shown up close in the gallery.
1988 Porsche 911 Turbo Cabriolet M505 Slant Nose photo 4
Forged 16″ Fuchs alloy wheels with body-color centers are mounted with Michelin Pilot SX tires that show date codes from 2021 and 2023. Braking is handled by four-wheel cross-drilled and ventilated discs, and the front and rear brake pads were replaced in May 2026. Turbo models received front and rear sway bars as standard.
1988 Porsche 911 Turbo Cabriolet M505 Slant Nose photo 5
The brown leather-to-sample interior houses power-adjustable front seats with adjustable lumbar support, an analog clock, power windows, a fire extinguisher, and a Blaupunkt cassette stereo. The door strikers were replaced in 2024, and work in May 2026 included replacing the window switches and the air conditioning condenser blower motor as well as recharging the air conditioning system with R12 refrigerant.
1988 Porsche 911 Turbo Cabriolet M505 Slant Nose photo 6
The four-spoke leather-wrapped steering wheel frames VDO instrumentation including a central tachometer with a 6,700-rpm redline as well as a 170-mph speedometer and gauges for oil pressure, oil temperature, oil level, fuel level, and boost pressure. The speedometer was repaired in 2015 and the six-digit odometer shows 40k miles, less than 1k of which were added under current ownership.
1988 Porsche 911 Turbo Cabriolet M505 Slant Nose photo 7
The turbocharged 3.3-liter flat-six was factory rated at 282 horsepower and 278 lb-ft of torque. The fuel pump and check valves, ignition wires, and the distributor cap and rotor were replaced in 2024, and the fuel level sending unit and battery were replaced in 2026. A trickle charger has been hardwired to the battery.

Seller Video

Sold on 09/01/2026 for USD $275,000 to WingedWheels

Bids & Comments

Sep 1, 2026 · 17:05
Congratulations! What a beautiful car!
K.Wise
Sep 1, 2026 · 17:05
Still a steal at these levels. These cars should be worth much more. I have an 87 Coupe. Legendary to drive and as appealing to just look at. Would not be surprised if these are million dollar cars someday. Maybe sooner than you think. Hope the car sells.
Sep 1, 2026 · 17:05
Welcome to the club @wingedwheels
Sep 1, 2026 · 17:05
K.O?
Jett
Sep 1, 2026 · 17:03
Nice bid!
WingedWheels Bid
Sep 1, 2026 · 17:03
Bid in the amount of $275,000
Waynekap333 Bid
Sep 1, 2026 · 17:03
Bid in the amount of $251,000
Sep 1, 2026 · 17:01
a man not to be denied!!!!!!
Sep 1, 2026 · 17:01
@galevin I completely agree. I thought 300k easy 🤷
WingedWheels Bid
Sep 1, 2026 · 17:01
Bid in the amount of $250,000
Waynekap333 Bid
Sep 1, 2026 · 17:01
Bid in the amount of $230,000
WingedWheels Bid
Sep 1, 2026 · 16:59
Bid in the amount of $225,000
Waynekap333 Bid
Sep 1, 2026 · 16:59
Bid in the amount of $216,000
WingedWheels Bid
Sep 1, 2026 · 16:58
Bid in the amount of $215,000
Waynekap333 Bid
Sep 1, 2026 · 16:58
Bid in the amount of $211,000
WingedWheels Bid
Sep 1, 2026 · 16:56
Bid in the amount of $210,000
Waynekap333 Bid
Sep 1, 2026 · 16:56
Bid in the amount of $205,000
Sep 1, 2026 · 16:54
Buy and enjoy. Watch the investment appreciate
Sep 1, 2026 · 16:48
Think about it. Loosing a thousand dollars will not change your life. Winning that car will!
MWar
Sep 1, 2026 · 16:45
hmm, is $200k enough for an "It is outta here" blast ...
cbjeep
Sep 1, 2026 · 16:26
Wow outstanding M505 this auction is going to be great to watch grab your cup of Joe and let's go should be a monster end result!
EJM
Sep 1, 2026 · 16:23
The Heading should say
Ex Mr. October 930 M505 Cabriolet PTS
Jukebox
Sep 1, 2026 · 16:14
@Jamride At least I can say I bid on it. 😁
Sep 1, 2026 · 14:39
@Gmcgee
I knew it the moment I saw it, that it was Reggie’s car! I shared it with him, he may comment. I remember a long ride together in the car from Monterey to Oakland. He kept it into the late 90’s sometime. He had numerous turbos starting in the 70’s
Sep 1, 2026 · 14:30
@Legendary_Motorcars
I have been told he was the original owner ordered and specified those PTS options. I appreciate you confirming this.
This is in the owners manual.
Sep 1, 2026 · 14:07
For the life of me I can't understand how these cars aren't trading for higher values . They posses all the essential qualities of a rare collector automobile. A car that truly defines a decade! Beautiful example! GLWTA
Sep 1, 2026 · 13:24
I think the original owner of this car is a good friend of mine. I can’t imagine there was more than one built in this color combination. HOF ball player
Sep 1, 2026 · 00:12
I also know this car and seller personally……incredible specimen……
Aug 31, 2026 · 20:27
I know this car and the seller personally, and can vouch for the quality and condition of the car, and the seller as a true enthusiast. The prior owner is a highly respected air-cooled Porsche specialist, and has been my long-time mechanic / consultant on everything I've owned from my first 3.2, to my RS America, 993, 996 GT3, 997 GT3, 997 GT3RS, GT4, etc. Rest-assured you will not find a more properly sorted and uniquely spec'd M505 out there. Bid with confidence and GLWA !
Aug 31, 2026 · 14:16
This car is sitting on my showroom and people pass the new 911's to check it out first. Stunning car that is in wonderful unmolested factory condition. The owner is a true steward of the classics and no expense is ever spared on his cars.
Aug 31, 2026 · 13:56
@Beachboy18 actually the 1975-1979 930s were also considered to be hand made. The fenders were hand welded to create the flare. Starting in 80 they were all stamped.
Aug 31, 2026 · 11:08
Very rare color. According to Rennbow, it’s 5/5 paint cans making it very rare color, especially on a Slant nose! Best of luck to whoever wins this PTS unicorn!
BeachBoy18
Aug 31, 2026 · 09:46
Only hand made 911
HALMO_USA
Aug 31, 2026 · 08:10
The M505 option is one of the more interesting factory paths in the 930 story — a Werks I option built alongside the 959 program on the same Zuffenhausen line, requested by clients who wanted the 935-inspired flat-nose look with full factory warranty rather than a coachbuilt conversion. Cabriolet examples in this configuration are the scarcest of the lot!
Amazing car!
GLWTA
Aug 30, 2026 · 22:57
@Carrerachas
Thank you, I completely agree. Exactly why I sold my Turbo S and turned that $ into a fully restored 69T.
Hard to have fun in that car normal driving and the alternative was possible arrest.
Gmcgee
Aug 30, 2026 · 22:57
@Carrerachas
Thank you, I completely agree. Exactly why I sold my Turbo S and turned that $ into a fully restored 69T.
Hard to have fun in that car normal driving and the alternative was possible arrest.
Aug 30, 2026 · 22:54
@WingedWheels
That’s classic.
Gmcgee
Aug 30, 2026 · 22:54
@WingedWheels
That’s classic.
Aug 30, 2026 · 16:55
@jukebox
We grandpas use our Social Security checks wisely.
Aug 30, 2026 · 14:09
Beautifull turbo. The grandpa driving comment cracks me up. I'm 66. I sold my hot rod 79 930 about 5 years ago, and kept my 88 911 cab. The main reason why I sold the 930 was it was hard to drive it as intended due to too much traffic. The only way I would be able to exercise the turbo properly was to get up at 7 am on a Saturday or Sunday (not to church) to run it on the highway north of Atlanta. Even then, I could only do full boost sprints sporadically as traffic would build (as the cops) but I would still try and work around it. I got lucky many times. Rolling 60 - 120 sprints were epic on full boost bar none. I ended starting to drive the turbo as I did the 88 (similar to this driving video) so I decided to sell the 930.
Jukebox
Aug 30, 2026 · 14:05
Well, that surely escalated. You grandpas aren't playing around.
WingedWheels Bid
Aug 30, 2026 · 13:42
Bid in the amount of $200,000
Aug 30, 2026 · 13:35
@seller
Sorry that I missed the most recent info on tires. It’s clear you care about and have cared for the car. It’s really nice.
Didn’t mean the grandpa as an insult, especially as I am one and am older than you! I just drive my cars with a tad more spirit than in your video and am interested in this car exactly because it’s a turbo with iconic, widow-making lag. I’ll be bidding and of course wish you the very best with the auction.
Aug 29, 2026 · 21:26
Tires, I posted an invoice for a 17” set that went on my other 930. it has a set of aftermarket speed lines on it. ( can send a picture id anyone needs) this is the correct invoice for the tires that are on the listed car.
Gmcgee
Aug 29, 2026 · 21:26
Tires, I posted an invoice for a 17” set that went on my other 930. it has a set of aftermarket speed lines on it. ( can send a picture id anyone needs) this is the correct invoice for the tires that are on the listed car.
Aug 29, 2026 · 21:07
Tire Rack invoice
Gmcgee
Aug 29, 2026 · 21:07
Tire Rack invoice
Aug 29, 2026 · 20:55
@WingedWheels
Apologies, I told you I’m old. Tires. Look at pictures 139-146. Date codes are 21 and 23. I put new Michelins on when I bought.
Gmcgee
Aug 29, 2026 · 20:55
@WingedWheels
Apologies, I told you I’m old. Tires. Look at pictures 139-146. Date codes are 21 and 23. I put new Michelins on when I bought.
Aug 29, 2026 · 20:49
@WingedWheels
My apologies, brake fluid. Excellent question. Had that flushed when I purchased. I have all mine done every 2 years.
Gmcgee
Aug 29, 2026 · 20:49
@WingedWheels
My apologies, brake fluid. Excellent question. Had that flushed when I purchased. I have all mine done every 2 years.
Aug 29, 2026 · 20:46
@WingedWheels
When I purchased the car the owner who also happens to be the owner of Desoto Euro Werks Monty Montgomery replaced the fuel filter and fuel accumulator as part of the deal. You’ll noticed on one of the invoices from Pelican that I purchased new check valves and had him install when he did the complete tune up at that time. I checked all the rubber lines and was satisfied at that time so I did not replace. Over my two years of ownership I have added approximately 900 miles and assure you that the car was driven at least 15-30 min every month I’ve owned. I am retired so have time to regularly exercise all mine. I had the 90 SC targa out this morning. The car has been stored properly (see picture-it’s the one on top)as it was under Monty’s ownership.
Gmcgee
Aug 29, 2026 · 20:46
@WingedWheels
When I purchased the car the owner who also happens to be the owner of Desoto Euro Werks Monty Montgomery replaced the fuel filter and fuel accumulator as part of the deal. You’ll noticed on one of the invoices from Pelican that I purchased new check valves and had him install when he did the complete tune up at that time. I checked all the rubber lines and was satisfied at that time so I did not replace. Over my two years of ownership I have added approximately 900 miles and assure you that the car was driven at least 15-30 min every month I’ve owned. I am retired so have time to regularly exercise all mine. I had the 90 SC targa out this morning. The car has been stored properly (see picture-it’s the one on top)as it was under Monty’s ownership.
Aug 29, 2026 · 20:35
@WingedWheels
Thank you, wasn’t sure how to take the “grandpa” comment seeing as I am 64 and will be eligible for Medicare this year but I was advised to take every question seriously and respond. I can assure you that the car is fully capable of a full boost sprint. I have 5 911s including another 930 and do occasionally push them but mostly I drive them to be enjoyed. You might say cruise and revel in the simple analogue nature of the original engineering. That said, if you are the winning bidder and the car doesn’t perform to your liking on the first drive, you get in touch with me and I’ll buy it back.
Gmcgee
Aug 29, 2026 · 20:35
@WingedWheels
Thank you, wasn’t sure how to take the “grandpa” comment seeing as I am 64 and will be eligible for Medicare this year but I was advised to take every question seriously and respond. I can assure you that the car is fully capable of a full boost sprint. I have 5 911s including another 930 and do occasionally push them but mostly I drive them to be enjoyed. You might say cruise and revel in the simple analogue nature of the original engineering. That said, if you are the winning bidder and the car doesn’t perform to your liking on the first drive, you get in touch with me and I’ll buy it back.
Aug 29, 2026 · 20:25
@seller
It’s evident this lovely car has sat a lot. What’s the condition of the rubber fuel lines and the accumulator? When’s the last time the brake fluid was flushed, and what’s the condition of the brake lines? I’m just concerned about overall rubber rot on a car that’s been sitting so long (after all, the tires are 11 years old). Not a big deal, just a bunch of potential deferred service for the buyer.
Gmcgee
Aug 29, 2026 · 17:50
More
Gmcgee
Aug 29, 2026 · 17:49
More
Aug 29, 2026 · 17:48
More
Gmcgee
Aug 29, 2026 · 17:48
More
Aug 29, 2026 · 17:48
As requested (in case anyone is curious, car is on display at Gossett Porsche) paint meter.
Gmcgee
Aug 29, 2026 · 17:48
As requested (in case anyone is curious, car is on display at Gossett Porsche) paint meter.
Aug 29, 2026 · 01:10
@seller
Wonderful car. Any chance you could post a video showing the car driven with spirit versus grandpa takes his old Porsche for a drive to church? It would be nice to see and hear the turbo engage.
Aug 28, 2026 · 19:47
Good afternoon, we inadvertently didn’t take those during the photo shoot. I will be taking those tomorrow morning as my local Porsche dealer has a meter. I’ll post by tomorrow evening.
Gmcgee
Aug 28, 2026 · 19:47
Good afternoon, we inadvertently didn’t take those during the photo shoot. I will be taking those tomorrow morning as my local Porsche dealer has a meter. I’ll post by tomorrow evening.
MWCRLN
Aug 28, 2026 · 16:11
@seller Kindly post paint meter readings.
Thank you!
Jukebox Bid
Aug 27, 2026 · 14:53
Bid in the amount of $91,000
jimbis
Aug 23, 2026 · 18:04
Does the car leak any oil whatsoever? When was the last time the engine was out with a reseal? Warm up regulator ever replaced?
Aug 23, 2026 · 16:40
A bit more clarity. I have not been able to find an OE Porsche cockpit cover. Aftermarket is available from Sierra Madre.
Gmcgee
Aug 23, 2026 · 16:40
A bit more clarity. I have not been able to find an OE Porsche cockpit cover. Aftermarket is available from Sierra Madre.
Aug 23, 2026 · 16:00
Here you go.
Thank you for your positive comment.
Gmcgee
Aug 23, 2026 · 16:00
Here you go.
Thank you for your positive comment.
Aug 23, 2026 · 15:53
Good morning. There are two covers. The one that comes with the car covers the top when it is down. The cockpit cover I searched for and was never able to find one especially in the matching color of the top. I’ll search my photos to see if I have one with it on. If not I’ll take one and post.
Gmcgee
Aug 23, 2026 · 15:53
Good morning. There are two covers. The one that comes with the car covers the top when it is down. The cockpit cover I searched for and was never able to find one especially in the matching color of the top. I’ll search my photos to see if I have one with it on. If not I’ll take one and post.
cpricedmd
Aug 23, 2026 · 01:42
Beautiful car. If possible, please post a pic with the tonneau cover in place. I have never seen one that covered both the passenger and driver side (which I am assuming this one must since there are fasteners along both window frames). Also, is the boot cover for the folded top included, and a pic if available. Thanks!
Aug 22, 2026 · 18:52
@WingedWheels
My pleasure. Want the car to present as clear and transparent as possible.
Gmcgee
Aug 22, 2026 · 18:52
@WingedWheels
My pleasure. Want the car to present as clear and transparent as possible.
Aug 22, 2026 · 17:35
@seller
Thanks so much for your prompt and clear responses to my questions. Greatly appreciate it!
Aug 22, 2026 · 16:43
@WingedWheels
All numbers are matching.
Gmcgee
Aug 22, 2026 · 16:43
@WingedWheels
All numbers are matching.
Aug 22, 2026 · 16:22
Slant nose, whale tail, and the goose neck CHMSL. Absolute classic
Aug 22, 2026 · 15:47
Studying your nice set of photos more carefully, I’ve got a few questions:
Good morning and thank you for your interest in my car.
1. What’s the pink non-factory hose in photo 233?
That is the heater box hose and is OE. Go on Pelican parts and search 930-211-622-01-OEM I would paste here but system wont allow me to.
2.Heat exchangers / turbo exhaust plumbing (photos 235 and 238) Any perforations or flange leaks?
No, I have had parked on my lift (top) and no signs of oil dripping. No perforations/leaks.
3. Oil sheen ( photos 231, 232, 235). Are the turbo oil return and cooler seals leaking? Also please confirm there’s no rust in the front cooler area (photos 241/242).
Same as #2 no oil drips. Absolutely no rust present. I was going to have it under side dry ice cleaned prior to listing but I decided that it would be better to show in the original state that you see. So, basically dirty Cosmoline.
4. Refinished transaxle/diff (photos 234, 236) sharply contrast with the rusty exhaust. Please confirm they are original. Were they rebuilt or just cleaned up for the photo shoot?
That is a very good question. The clutch was replaced by then owner of car and Desoto Euro Werks Monty Montgomery . The OE rubber center hub was broken which is very common and was replaced with spring center hub. While out of the car the trans was cleaned on the outside. Good eye on your part.
Again, thank you for the interest in my car.
Thanks!
Gmcgee
Aug 22, 2026 · 15:47
Studying your nice set of photos more carefully, I’ve got a few questions:
Good morning and thank you for your interest in my car.
1. What’s the pink non-factory hose in photo 233?
That is the heater box hose and is OE. Go on Pelican parts and search 930-211-622-01-OEM I would paste here but system wont allow me to.
2.Heat exchangers / turbo exhaust plumbing (photos 235 and 238) Any perforations or flange leaks?
No, I have had parked on my lift (top) and no signs of oil dripping. No perforations/leaks.
3. Oil sheen ( photos 231, 232, 235). Are the turbo oil return and cooler seals leaking? Also please confirm there’s no rust in the front cooler area (photos 241/242).
Same as #2 no oil drips. Absolutely no rust present. I was going to have it under side dry ice cleaned prior to listing but I decided that it would be better to show in the original state that you see. So, basically dirty Cosmoline.
4. Refinished transaxle/diff (photos 234, 236) sharply contrast with the rusty exhaust. Please confirm they are original. Were they rebuilt or just cleaned up for the photo shoot?
That is a very good question. The clutch was replaced by then owner of car and Desoto Euro Werks Monty Montgomery . The OE rubber center hub was broken which is very common and was replaced with spring center hub. While out of the car the trans was cleaned on the outside. Good eye on your part.
Again, thank you for the interest in my car.
Thanks!
Aug 22, 2026 · 14:20
@seller
Studying your nice set of photos more carefully, I’ve got a few questions:
1. What’s the pink non-factory hose in photo 233?
2.Heat exchangers / turbo exhaust plumbing (photos 235 and 238) Any perforations or flange leaks?
3. Oil sheen ( photos 231, 232, 235). Are the turbo oil return and cooler seals leaking? Also please confirm there’s no rust in the front cooler area (photos 241/242).
4. Refinished transaxle/diff (photos 234, 236) sharply contrast with the rusty exhaust. Please confirm they are original. Were they rebuilt or just cleaned up for the photo shoot?
Thanks!
Aug 22, 2026 · 13:32
@seller
Nice car!
Can you confirm the CoA engine (68J00860) and transaxle (2J11379) stampings on the car via pictures?
Thanks
bearofsa
Aug 22, 2026 · 02:29
The slant nose screams the 80s to me. Having been in the Navy when this one was born I can say I driving a manual dreaming of zooming around in a Porsche. GLWA!
bppatel Bid
Aug 22, 2026 · 00:25
Bid in the amount of $90,500
69_911e
Aug 21, 2026 · 15:12
Wowza! - PTS on both exterior and interior, plus the Slant Nose. Whoever ordered this must've had some pull with the powers that be! GLWTA.
GDogg
Aug 21, 2026 · 13:24
Oh, my, I know I’m not the only one salivating over this one.
Best wishes.
SL250 Bid
Aug 21, 2026 · 13:17
Bid in the amount of $90,000
Aug 21, 2026 · 13:06
Stunning 505. With the release of Pebble Flachbau, I bet interest in these start rising quickly. We can only hope that it makes it to prod! GLWTA
Jukebox Bid
Aug 21, 2026 · 13:01
Bid in the amount of $50,000
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Auction link copied
Winning Bid $275,000
SOLD