G-R Performance LTD

Oct 30th, 2022

Took my Subaru in for mapping after having it previously forged got a call less than an hour later to explain something had gone wrong so left the car at g-r for diagnostic and they found out the engine wasnt built correctly so they stripped it down and rebuilt with actual forged parts, new ecu plus a multitude of other thing, they was so helpful and kept me updated all the way through (even during covid and moving premises) there aftercare service is something else, I would never go anywhere again g-r for the win would 100% recommend
Sep 8th, 2022

Top lads and very good at what they do! Got my skyline running as it should.
Feb 23rd, 2022

Huge thanks to Garry & James for getting my Evo working again as it should! After taking it to a recommended specialist for mechanical work and mapping the car had constant issues resulting in it not being able to be driven. The guys at GRP quickly discovered and rectified the numerous bodge jobs with the ECU and E throttle wiring and even managed to point out parts that had been incorrectly supplied and installed resulting in the issues. The cars now running 400+hp and feels like a completely different car. Highly recommend GRP and wont be taking my Evo to anyone else from now on. If youve been recommended an Evo specialist around Sheffield, do yourself a big favour and make it GR Performance, youll massively regret it if you dont!
Dec 21st, 2021

Top guys, wouldn't go no where eles I would and have recommended everyone best in the evo game... Ry
Apr 22nd, 2021