GKR Performance

Ive known Glen since he started on the forums many many years ago! Having just had my newish 530d Tourer mapped by him after someone elses bodgery resolved I think its only fair to leave a glowing review this is the 5th diesel bmw Ive owned that GKR have sorted for me from my trusty old E46 320td compact Ive always come to glen no issues no catastrophic engine failures in 10+ years Ive not had any problems caused from his craftsmanship so if you want your car mapped by an expert look no futher
Apr 24th, 2023

Booked my f31 335d in at GKR with Glyn lost for words the car feels like a new car and pulls like a train with endless power and gearbox is now even smother and quicker changing gear.thanks to all at GKR the place to go for all your bmw needs
Jan 23rd, 2023

Glen is the man for BMW diesel tuning! An absolute wizard! I've had several vehicles here and have always been impressed!
Jan 8th, 2023

Had many cars mapped over the years. Went with gkr because a freind told me to and I'm so glad I did!! Glenn knows his stuff and takes time to explain it all! My car f31 335d was dropped off with 300hp and left with 425hp absolutely nuts power. Thanks again!!
Nov 27th, 2022

Nice guy, Glenn was extremely knowledgeable and easy to get along with. My car has never driven as well
Oct 13th, 2022