Blog
Guide
B58 Stage 1 vs Stage 2: Which Do You Need?
B58 stage 1 vs stage 2: what each map assumes, bootmod3 and MHD gains, the Gen 1 vs B58TU fuel limit, real parts costs, and what Supra and 540i owners report.
Fuel
B58 Stage 3 LPFP: 1000 WHP From a Single Pump
Our F chassis B58 Stage 3 brushless LPFP runs one pump on the factory control and is rated for 850+ whp on E85. What it fixes, what it cannot (the Gen 1...
Guide
H&R vs Eibach Lowering Springs: Which Drop Is Right for Your BMW?
H&R Sport and Eibach Pro-Kit compared on 14 BMW fitments with each maker's own drop figures, plus the xDrive and trim part number traps and the spring we would buy for each...
Guide
The B58 Bolt-On Build: What to Add and in What Order
The B58 bolt-on build order for the M240i, M340i, 440i, Z4 and Supra: plugs and Stage 1, a charge pipe on Gen 1 cars, catless downpipe and Stage 2, heat exchanger, then...