Mercedes-AMG GT4 (2018–present)
The Mercedes-AMG GT4 is the factory customer race car for the SRO GT4 class, built on the AMG GT R road car. It arrived for 2018, was updated in 2020 and re-homologated in 2025. It suits customer teams and amateur drivers who want a durable, easy-to-drive GT4 car.
History
Mercedes-AMG confirmed a GT4 programme in December 2016, at its season-end awards dinner in Stuttgart 13. The car was shown at the Spa 24 Hours in July 2017, priced at €198,850 before tax 1. It used the AMG GT R road car as its base and kept the twin-turbo V8 12. The aluminium spaceframe came from the road car, with a steel roll cage added 23. Power drives the rear wheels through a six-speed sequential transaxle 215. Development partner HWA ran three prototypes in test races during 2017 12.
Testing included a 30-hour endurance run at the Lausitzring and a planned 30,000 km of track work 1. First customer deliveries were due at the end of 2017, with racing from 2018 1. By March 2020 Mercedes had delivered more than 120 cars to customer teams 3. Power, weight and fuel are set race by race through Balance of Performance 39.
In March 2020 Mercedes launched an updated GT4 aimed at endurance racing, priced at €209,000 before tax 3. Brake cooling, the oil cooler layout and the rear track rods were revised, and GT3-style LED lights were fitted 34. Earlier cars could be brought to the new homologation with an update package 34. A Japanese team engineer said the kit fixed the oil temperature problem of the 2018 car 6.
In April 2025 SRO and the Belgian federation RACB granted a fresh homologation, valid until 2029 7. The update brought engine calibration changes, natural-fibre splitter and wing parts, rain lights and revised rear dampers 7. Owners buy it as a re-homologation kit priced at €7,990 7. The car races in GT4 European Series, GT4 America and IMSA Michelin Pilot Challenge, among others 7.
Palmarès
From its 2018 debut to March 2020 the GT4 started 363 races, with 53 overall wins, 151 class wins and 137 podiums 3. That tally included three class wins at the Nürburgring 24 Hours 3. In Japan the car took the Super Taikyu ST-Z class title in 2019 and 2020 5. In 2020 AMG GT4s won four of the five ST-Z rounds 6.
What to check before you buy
Confirm which homologation the car matches: original, 2020 update or 2025 kit: SRO GT4 cars are only eligible with the homologation file and an SRO GT4 certificate. The 2025 kit carries eligibility to 2029. Ask for the engine distance and the lifing records for engine and gearbox: One owner reports an engine rebuild point of 40,000 km. Sellers advertise lifing done to factory schedules, so ask to see the paperwork. Check that the 2020 oil cooler layout and brake cooling parts are fitted on a 2018 or 2019 chassis: Without them the car can overheat its oil and brakes in long races. Inspect the rear track rods and ask whether they are the 2020 longer-life parts: Mercedes changed these parts in 2020 to extend their life. Make sure the laptop tuning cable and access to the AMG customer portal come with the car: Power levels are set by laptop. The portal holds service and setup data, torque figures, manuals and the spare parts catalogue. List the spares package: wheel sets, bodywork, splitter, skates and stands: Used cars are often sold with extra wheel sets and body parts. Their value changes the real price of the deal. Ask about accident history and check the aluminium spaceframe: The chassis is an aluminium spaceframe from the GT R road car. Repairs to it are a specialist job.
Versions and evolutions
| Version | Years | What changed | How to identify |
|---|---|---|---|
| GT4 (original homologation) | 2017–2020 | Launch car on AMG GT R base with six-speed sequential transaxle and steel cage. Teams reported high engine oil temperatures in long, hot races. 2 | Earlier headlight and tail-light units that do not match the 2020 GT3; original oil cooler layout and front brake ducting. |
| GT4 2020 update (often called GT4 Evo) | 2020–2025 | Larger brake air intake and lines, carbon brake duct, new front disc and caliper adapters. Re-arranged oil cooler and carbon exhaust air duct. Longer-life rear track rods, bigger brake fluid tank, revised V8 torque control. New homologation valid from March 2020. 3 | LED headlights and tail lights shared with the 2020 GT3; natural-fibre bonnet edge. Earlier cars can carry the same parts via the update kit, so ask for the kit invoice. |
| GT4 2025 re-homologation | 2025–present | Engine calibration changed for drivability, natural-fibre front splitter and rear wing parts, new rain lights, revised rear dampers. Homologation valid until 2029. 7 | New rain lights and natural-fibre splitter and wing. Ask for proof of the €7,990 re-homologation kit. |
Known issues
- Engine oil overheating on original-spec cars — Oil temperature reaches its limit in long or summer races; one Super Taikyu team had to short-shift at Autopolis in 2019. The 2020 kit moved the oil cooler. unknown (part of the 2020 update kit) 6
- Front brake heat and wear in endurance use — Brake temperatures and wear rise over long stints or in hot weather. Mercedes answered with larger ducts, a new front disc and caliper adapters in 2020. 4
- Rear track rod life — Mercedes fitted modified rear track rods with longer life in 2020, shared with the GT3. Cars without the update still run the original parts. 3
- Heavy Balance of Performance penalties in pro series — One IMSA owner ran about 180 kg of added weight and a power setting about 42 hp down. In SRO GT4 America (October 2025) the car carried +30 kg at Power Level 2. not a repair cost; affects results 8
- Slow refuelling — The 120-litre tank sits high at the rear, so refuelling takes longer in endurance races. BoP can also cap usable fuel, about 78 litres in one IMSA case. not a repair cost 6
- Homologation expiry without the 2025 kit — The current homologation runs to 2029 and comes as a re-homologation kit. A car without it may not match the current homologation file used at scrutineering. €7,990 for the kit (April 2025), plus fitting 7
Checklist before you buy
- Confirm which homologation the car matches: original, 2020 update or 2025 kit. — SRO GT4 cars are only eligible with the homologation file and an SRO GT4 certificate. The 2025 kit carries eligibility to 2029. 9
- Ask for the engine distance and the lifing records for engine and gearbox. — One owner reports an engine rebuild point of 40,000 km. Sellers advertise lifing done to factory schedules, so ask to see the paperwork. 8
- Check that the 2020 oil cooler layout and brake cooling parts are fitted on a 2018 or 2019 chassis. — Without them the car can overheat its oil and brakes in long races. 3
- Inspect the rear track rods and ask whether they are the 2020 longer-life parts. — Mercedes changed these parts in 2020 to extend their life. 3
- Make sure the laptop tuning cable and access to the AMG customer portal come with the car. — Power levels are set by laptop. The portal holds service and setup data, torque figures, manuals and the spare parts catalogue. 8
- List the spares package: wheel sets, bodywork, splitter, skates and stands. — Used cars are often sold with extra wheel sets and body parts. Their value changes the real price of the deal. 11
- Ask about accident history and check the aluminium spaceframe. — The chassis is an aluminium spaceframe from the GT R road car. Repairs to it are a specialist job. 2
Running costs 8
| Rebuild interval | Engine rebuild at 40,000 km according to one owner; gearbox interval not published in open sources |
|---|---|
| Typical rebuild cost | unknown |
| Consumables | 18-inch slicks 3 (305/660-18 front, 305/680-18 rear), brake pads, discs; pads may be changed under GT4 rules but calipers and rotors may not 6 |
| Spares availability | Factory parts through the AMG customer portal; in North America via Multimatic in Mooresville; Japan reported about one week by airmail 68 |
Where it races today
- SRO GT4 (GT4 European Series, GT4 America and national GT4 series) · GT4 — Homologated by SRO and RACB; 2025 homologation valid until 2029. BoP varies by event. 7
- IMSA Michelin Pilot Challenge · GS — Listed among the car's 2025 series; IMSA publishes its own BoP tables 78. 7
- British GT Championship · GT4 — An ex-British GT car raced with Ram Racing in 2024 was offered for sale in 2025. 11
- Super Taikyu (Japan) · ST-Z — ST-Z is the Super Taikyu GT4 class; the AMG GT4 won it in 2019 and 2020. 5
- Nürburgring 24 Hours · GT4 class — Three class wins by March 2020. 3
Market prices
- New price at launch, ex works, excluding tax: 198,850 EUR (2017-07) 1
- New price for the 2020 updated car, ex Affalterbach, excluding VAT: 209,000 EUR (2020-03) 3
- 2023 car, 900 km, never raced, PCARMARKET online auction high bid; sale not confirmed: 230,000 USD (2023-07) 10
- Used GT4 on the US secondary market (RacingJunk figure quoted by NASA Speed News): 175,000 USD (2025-02) 8
- 2025 re-homologation kit (to 2029): 7,990 EUR (2025-04) 7
Public used prices are scarce; many sellers list price on request. Quoted used figures in 2025 sat below the 2020 new price, and racingcarnetwork.com had no AMG GT4 listed on 6 November 2026 14.
Reference prices are dated and sourced; live asking prices are in the listings above.
Frequently asked questions
What is the difference between a 2018 AMG GT4 and the 2020 Evo?
The 2020 car has better brake cooling, a new front disc, a re-arranged oil cooler, longer-life rear track rods and GT3-style LED lights. Mercedes sold the same changes as a kit for older cars. A 2018 chassis with the kit can match the 2020 homologation.
Is the AMG GT4 still eligible to race?
Yes. In April 2025 SRO and RACB granted a new homologation valid until 2029. To use it, a car needs the re-homologation kit, priced at €7,990 when announced. Check that the seller has fitted it and holds the paperwork.
How long does the engine last between rebuilds?
One North American owner reports a rebuild point of 40,000 km for the V8. We could not open an official Mercedes schedule. Ask the seller for the lifing sheet and the distance on engine and gearbox.
Why do AMG GT4s sometimes look slow in results?
The car is easy to drive, so Balance of Performance often adds weight and cuts power. One IMSA owner ran about 180 kg of extra weight. The handicap changes by event and series, so check the current BoP sheet.
Where do I get parts?
Mercedes-AMG supplies parts and technical data through its customer racing portal. In North America the parts operation is run by Multimatic in Mooresville, North Carolina. A Japanese team reported parts arriving in about a week by airmail.
Sources
- Mercedes reveals new customer GT4 challenger for 2018 season, Autosport (2017-07) — Reveal at Spa, launch price, GT R base, deliveries, test programme, development drivers
- New Mercedes-AMG GT4 Race Car Reporting For Duty At Spa-Francorchamps, Carscoops (2017-07) — Launch power and torque claims, aluminium spaceframe, transaxle
- Mercedes-AMG reveals new GT4 model for its customer racing programme, Race Tech (2020-03) — 2020 specifications, list of changes, update kit, price, cars delivered, race statistics
- Mercedes-AMG Reveals GT4 Evo for Debut This Month, Sportscar365 (2020-03) — 2020 update aims (brake wear, cooling), parts shared with GT3, upgrade kit
- Super Taikyu machine focus: Mercedes-AMG GT4 (page 1), autosport web (Japan) (2021-02) — Super Taikyu ST-Z titles 2019 and 2020
- Super Taikyu machine focus: Mercedes-AMG GT4 (page 2), autosport web (Japan) (2021-02) — Oil temperature problem on 2018 car, 2020 kit changes, refuelling, parts lead time, 2020 results
- Mercedes-AMG Rolls Out GT4 Update; Extends Homologation, Sportscar365 (2025-04) — 2025 update content, homologation to 2029, kit price, series
- An Overnight Sensation: The AMG GT4, NASA Speed News (2025-02) — Owner-reported engine rebuild interval, BoP weight and power, parts via Multimatic, power dial, used price quote
- Balance of Performance SRO GT4 cars, Indianapolis, SRO Motorsports Group (GT4 America) (2025-10) — Current minimum weight, ballast and power level; eligibility conditions
- 2023 Mercedes-Benz AMG GT4 Race Car, PCARMARKET (2023-07) — Auction high bid, mileage and inclusions
- For Sale: Mercedes-AMG GT4, GT4 European Series (2025-05) — Ex-British GT car, spares package, lifing to factory specification
- Mercedes-AMG GT4, Ultimatecarpage (2018) — HWA as development partner, prototype test races
- Mercedes-AMG to Build GT4 Car, Sportscar365 (2016-12) — Programme announcement
- racingcarnetwork.com search: AMG GT4, Racing Car Network (2026-11) — No AMG GT4 listings on the check date
- PCarmarket Is Selling A Weapons-Grade 2023 Mercedes-Benz GT4 Race Car, Motorious (2023-07) — M178 engine code, AP Racing brakes, magnesium gearbox casing
Did you know
- Former DTM champion Bernd Schneider was one of the development drivers, and the car completed a 30-hour endurance simulation at the Lausitzring 1.
- The power dial offers ten settings, each worth about 7 hp, changed by laptop 8.
- The 2020 car introduced a natural-fibre bonnet edge, and the 2025 update added natural-fibre splitter and wing parts 37.
In the marketplace now
View all →No exact Mercedes-AMG GT4 (2018–present) listed right now — here is closely related machinery on the market.
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