Power Upgrades & ECU Tuning
Remaps · Bolt-ons · Custom setups
From simple ECU remaps to hardware-supported power upgrades, we can tailor the B58 A90 package to your goals using proven software and parts.
GR Toyota Supra A90 Tuning
GR Toyota Supra A90 Tuning Packages
Stock 370 bhp* to 600+ bhp street and track builds. In-house development on our own A90, dyno-proven packages and supporting mods — supplied, fitted and mapped at Whifbitz.
*Typical dyno figure for a standard 2020 GR Supra A90 on our Dynojet 4WD rolling road.
- 600+ bhp B58 Supra A90 builds
- Since 2000 Supra specialists (Mk4 & A90)
- Dynojet 4WD 2000 bhp rolling road
- Kits Whifbitz tuning kits up to 700+ bhp*
From custom A90 packages to complete Whifbitz tuning kits for other platforms offering approx. 450 bhp to 700+ bhp, depending on application and spec.
Built Around the B58 GR Supra
We took delivery of our GR Toyota Supra A90 in 2019 to lead development on this platform. Since then we’ve been testing bolt-on parts, turbos, cooling and software on our own shop car — not just on paper.
The B58 engine responds incredibly well to tuning, with 600+ bhp achievable with the right combination of hardware and mapping while remaining usable on the road.
- In-house packages developed and proven on our own GR Supra A90.
- Power, handling, braking, cooling and styling upgrades available.
- Dyno-backed calibrations for UK fuel and real-world conditions.
- OEM+ to full track builds, tailored around how you use the car.
GR Supra A90 Upgrades, Mods & Tuning Kits
Exhaust Systems & Downpipes
Sports cats · OPF-friendly options
Cat-back systems, sports-cat and decat downpipes and OPF-friendly options to improve sound, response and flow, while matching your noise and usage requirements.
Suspension & Geometry
Coilovers · ARBs · Arms
Coilovers, springs, anti-roll bars, adjustable arms and full geometry setups for sharper turn-in, better traction and confidence on B-roads or track.
Brake Upgrades
Big brake kits · Pads · Discs
AP Racing and big brake kits, uprated discs and pads, braided lines and high-temp fluids to keep braking consistent at higher power levels.
Cooling & Reliability
Chargecoolers · Radiators · Oil Cooling
Chargecooler, radiator and oil cooling upgrades to keep intake and oil temperatures under control, especially on tuned or track-driven cars.
Styling & Carbon Parts
Carbon · Aero · Interior
Carbon lips, splitters, diffusers, boot spoilers, wings and interior trim to give your A90 an OEM+ or more aggressive look.
Servicing & General Maintenance
OEM-grade parts · Motul fluids
Routine servicing, health checks, plugs, filters, fluids and preventative maintenance to keep your GR Supra A90 running at its best.
Whifbitz Tuning Kits
Proven upgrade packages for the A90
Our Whifbitz upgrade kits for the GR Supra A90 cover everything from ECU tuning and bolt-ons to full supporting hardware, with proven gains from stock power up to 600+ bhp depending on the setup. All packages are based on parts tested on our own A90 development car.
Supporting Mods for Real-World Use
Power is only half the story. We supply and fit suspension, brakes, wheels and tyres, aero and cooling upgrades to keep your GR Supra A90 composed and reliable at higher power levels.
- Coilovers, ARBs, arms and geometry setups.
- AP Racing and big-brake conversions.
- Chargecooler, radiator and oil cooling upgrades.
- Carbon aero, styling and interior parts.
GR Supra A90s at Whifbitz
A few of the A90s we’ve had through the workshop for power upgrades, suspension, brakes and full builds.
See Our GR Supra A90 Customer Cars
Browse some of the A90 builds we’ve worked on — from subtle fast-road cars to big-power conversions.
