2006 Ford GT Supercharged 5.4 V8
One of 4,038, upgraded in 2014, and the tune file no longer exists
Overview
Compiled by Kept from the seller's intake answers, the documents supplied and published records for the model. The seller does not write or edit this section, and nobody from Kept has inspected the car.
This 2006 Ford GT is finished in Midnight Blue with the blue stripes over black, and is offered from Melrose by , its second owner since 2018 and the man who imported it. It carries the supercharged 5.4 litre V8 and the six speed manual, and shows 21,400km. Ford built 4,038 across 2005 and 2006.
The car is not standard and the listing says so first. A previous owner changed the supercharger pulley, the injectors and the tune in the United States in 2014 at 11,200km. The original pulley, injectors and airbox were kept and are boxed and included in the sale, which means the car can be returned to standard by whoever buys it.
What cannot be produced is the paperwork for that work. The tune file and the dyno sheets were held by the shop that did it, that shop closed in 2019, and the seller declined at intake to describe the power figures from memory. The answer to that question existed and no longer does. A bidder is being asked to buy a modified car whose modification is disclosed, whose original parts are included, and whose calibration is undocumented.
The rest of the file is complete: United States invoices from new to 2018, South African invoices since, and a pre-sale service in May with the ECU read and printed and a compression test on all eight cylinders, both published. The other flaws stated are an original fuel tank bladder at nineteen years that has never been inspected internally, tyres date coded 2019 in a size that is now discontinued, two stone chips through to primer on the nose, and air conditioning that cools weakly at idle.
Model background
Ford built the GT for its own hundredth birthday, took the 1960s GT40 that beat Ferrari at Le Mans four times, and made a modern car that looks like it in a way no other retro exercise has managed. An aluminium spaceframe, a supercharged 5.4 litre V8 behind the driver making 550 horsepower, a six speed manual and no electronic driver aids worth the name. 4,038 were built across two model years and then it stopped.
It has aged into one of the few modern cars that is worth more than it cost and is still genuinely usable. The mechanical package is robust, the parts are Ford parts where they are shared and unobtainable where they are not, and the two things owners actually worry about are the fuel tank bladder, which degrades with age and standing rather than use, and the tyres, which were a bespoke Goodyear size that has been out of production for years.
Almost all of them were modified. A pulley and a tune takes a standard car past 700 horsepower and the aftermarket did it to most of them, which has produced a market that now pays a premium for standard cars and a discount for undocumented ones. Whether the original parts came with the car, and whether the calibration can be produced, is the whole valuation question on a modified GT.
Essentials
- Lot
- KPT-085
- Year
- 2006
- Model
- GT Supercharged 5.4 V8
- Mileage
- 21,400 km
- Transmission
- 6-speed manual
- VIN
- 1FAFP90S26Y401237
- Location
- Melrose, Johannesburg
- Seller
- melrose_gt40
- Seller is
- Private, second owner, 7 years
- Watchers
- 468
Seller interview
Before the car went live, the seller answered a standard set of questions plus a set our tools generated for this model from its documented failure modes. The full transcript is public, including anything they declined.
10 of 11 answered, 1 declined. A high score means the seller told you more, not that the car is better.
Inferred from the seller's answers and this model's known failure points. Nobody from Kept has inspected this car.
1 question the seller declined
What is the current calibration, what does the car make now, and can you produce the tune file or the dyno sheets for the 2014 work?
On a modified GT the calibration is the difference between a documented upgrade and an unknown one. The seller holds the car and not the file.
Known flaws
The seller's own list of what this car needs money spent on.
- 01Supercharger pulley and tune changed by a previous owner in 2014, and the tune file and dyno sheets were held by a shop that closed in 2019, so the seller declined to describe the numbers from memory
- 02Original pulley, injectors and the standard airbox are retained and included in the sale
- 03Fuel tank bladder is original at nineteen years and has not been replaced or inspected internally
- 04Tyres are 2019 date coded and the original specification size is discontinued
- 05Two stone chips through to primer on the nose, not touched in
- 06Air conditioning cools weakly at idle, the compressor has not been replaced
Service record
Documents & what's included
What physically comes with the car.
- 01NATIS registration certificate, in melrose_gt40's name
- 02Import file from the 2018 entry: bill of lading, SARS release, letter of authority, police clearance
- 03United States service invoices from 2006 to 2018, then South African invoices to 2025
- 04ECU printout and eight cylinder compression sheet, May 2025
- 05The original supercharger pulley, injectors and airbox, boxed and included
- 06Two keys and the original books
- 07Roadworthy certificate issued within the last six months
Note from the seller
The seller's own words, published as written. The only copy on this page they control.
I bought this in 2018 from the second owner in Arizona and imported it myself. It has done about 6,600km with me in seven years, all of it on the road, none of it on a circuit. It lives in a dehumidified garage in Melrose and it is started and driven every second week.
The car was pulleyed and tuned in 2014 by the man before me and I have never changed it back, though I have every original part in a box on the shelf and they go with it. What I do not have is his tune file or his dyno sheets, because the shop that held them shut in 2019 and I have tried twice to trace them.
I was asked at intake what the car makes now and I declined, because the only honest answer is that a man told me a number over the phone in 2018 and I have never had it on a dyno myself. I am not putting that number on this page as though I know it. Put it on a dyno before you bid if it matters to you, and it should.
Comments & offers
6 comments · 3 offers
The tune is gone, the shop is gone, and the man will not repeat a number he heard on a phone call seven years ago. He has published compression on all eight cylinders instead, which is the closest thing to an answer anybody can still get. Reserve is not met and I would not meet it either without a dyno sheet of my own.
Compression on all eight published and an ECU printout on a supercharged car that has been running an unknown map for eleven years is the most useful pair of documents here. The compression sheet is what tells you the unknown map has not hurt it.
Declining to quote a power figure he was told on the phone is the right call. Half the modified GTs advertised anywhere carry a number the current owner has never verified, quoted as though it were on a plaque.
No, and I am not going to pretend otherwise. It has never been inspected internally in my seven years and there is nothing in the American file about it either. It has never fuel starved, run rough or thrown a fuel trim code, and the ECU printout in the documents supports that. It is still an original bladder and I have put it on the flaws list for that reason.
The bladder is the number nobody wants to talk about. Original at nineteen years on a car that has covered 21,400km is exactly the use pattern that degrades them, and it is a tank out job. Has anyone had a scope in it?
Original pulley, injectors and airbox in a box and included. That is the difference between a modified GT that can be made right and a modified GT that cannot, and it is worth a great deal more than the listing is currently getting for it.
Comments & bids
6 comments · 3 offersThe crowd checks the report. Offers post inline, and the seller answers directly. Most recent first.
The tune is gone, the shop is gone, and the man will not repeat a number he heard on a phone call seven years ago. He has published compression on all eight cylinders instead, which is the closest thing to an answer anybody can still get. Reserve is not met and I would not meet it either without a dyno sheet of my own.
Compression on all eight published and an ECU printout on a supercharged car that has been running an unknown map for eleven years is the most useful pair of documents here. The compression sheet is what tells you the unknown map has not hurt it.
Declining to quote a power figure he was told on the phone is the right call. Half the modified GTs advertised anywhere carry a number the current owner has never verified, quoted as though it were on a plaque.
No, and I am not going to pretend otherwise. It has never been inspected internally in my seven years and there is nothing in the American file about it either. It has never fuel starved, run rough or thrown a fuel trim code, and the ECU printout in the documents supports that. It is still an original bladder and I have put it on the flaws list for that reason.
The bladder is the number nobody wants to talk about. Original at nineteen years on a car that has covered 21,400km is exactly the use pattern that degrades them, and it is a tank out job. Has anyone had a scope in it?
Original pulley, injectors and airbox in a box and included. That is the difference between a modified GT that can be made right and a modified GT that cannot, and it is worth a great deal more than the listing is currently getting for it.