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Modified 1988 Porsche 911 Turbo Coupe M505 Slant Nose
United States • 22 Sept 2026
Vehicle Details
AI Listing Summary
This modified 1988 Porsche 911 Turbo M505 Slant Nose coupe has received extensive mechanical and interior refurbishment, including a K27 turbocharger and a refreshed interior, now showing 68k miles. Despite significant investment, past reported damage and non-CARB compliant modifications should be noted.
Condition
7
The car has undergone significant mechanical and interior refreshment (~$90k) including a rebuilt engine, new clutch, and reupholstered interior. However, the Carfax report notes past damage and accidents, and some modifications are not CARB compliant. The description also mentions minor signs of wear typical for a car of this age, despite the extensive recent work.
/ 10
Transmission:
Manual
Chassis No:
WP0JB0938JS050551
Odometer:
67,000 miles
Reg Number:
[Reg Number]
RHD/LHD:
LHD
Turbocharged 3.3-Liter Flat-Six K27 Turbocharger Fabspeed Intercooler & Exhaust Manifolds Four-Speed Manual Transaxle Black Paint Reupholstered in Black Leather 18” Multi-Piece Wheels Tea Tray Rear Spoiler Sunroof Porsche Classic Radio Head Unit Audison Speakers & JL Audio Amplifier Air Conditioning Service Records
This 1988 Porsche 911 Turbo is a factory M505 slant nose coupe that was acquired by the current owner in 2024 and subsequently underwent a refresh totalling ~$90k, which included installing a K27 turbocharger and a Fabspeed intercooler and exhaust manifolds for the turbocharged 3.3-liter flat-six, as well as overhauling the oiling and ignition systems.
Additional work included replacing the motor mounts, fuel accumulator and pumps, and heater hoses, as well as the clutch, flywheel, pressure plate, and shifter bushings for the four-speed manual transaxle.
The cabin was retrimmed in black leather with a replacement dashboard and carpeting, and a Porsche Classic Radio head u...
Points of note
£41,682
Lowest Price (Since 2020)
£161,886
Median Price (Since 2020)
£399,000
Highest Price (Since 2020)
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