Got a MS43 ECU from these guys for my E39 530i. I asked for a remap + post cat λ delete + SAP delete. The old bimmer pulls harder all the way to the 7k rev limiter with no more flat spots. The linear power delivery is impressive. Driveability is much improved due to better throttle response. The engine even sounds smoother! I highly recommend them! Thank you fellas, esp. you Kyle!
1 February 2019
