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BMW S58 twin-turbo engine (G80 M3, G82 M4)
BMW S58 Build Guide: G80 M3 & G82 M4
A stage-by-stage BMW S58 build path for the G80 M3, G82 M4 and X3M/X4M — ECU unlock, tune, downpipes, cooling and fueling, with the parts for each step. Read more...
BMW N55 single-turbo inline-six engine
BMW N55 Build Guide: 135i, 335i, 435i, M235i & M2
A stage-by-stage BMW N55 build path for the 135i, 335i, 435i, M235i and base F87 M2 — tune, bolt-ons, cooling and fueling, with the parts for each step. Read more...
BMW N54 twin-turbo engine (135i, 335i, 1M)
BMW N54 Build Guide: 135i, 335i, 1M & Z4
A stage-by-stage BMW N54 build path for the 135i, 335i, 1M and Z4 — tune, bolt-ons, cooling, fueling and big-turbo power, with the parts to get there. Read more...
Catless race downpipes for a turbocharged BMW
Catted vs Catless Downpipes: CEL, Emissions & Sound Explained
Catted vs catless BMW downpipes explained — check-engine lights, emissions and CARB legality, and sound — so you pick the right one for your car and state. Read more...
Burger Motorsports JB4 tuner for BMW
JB4 vs Bootmod3 vs MHD vs EcuTek: Which BMW Tune Is Right?
JB4 piggyback vs Bootmod3, MHD and EcuTek flash tunes for BMW and the Supra — how each works, pros and cons, a side-by-side table, and which to choose. Read more...
KW V3 coilover kit for BMW
Best Coilovers for BMW: KW vs H&R vs Bilstein vs AST vs Eibach
How to choose BMW coilovers and lowering springs — KW, H&R, Bilstein, AST and Eibach compared by ride, adjustability and use, with a quick pick-by-goal chart. Read more...
BMW S55 twin-turbo engine (F80 M3, F82 M4, M2 Competition)
BMW S55 Build Guide: F80 M3, F82 M4 & M2 Competition
A stage-by-stage BMW S55 build path for the F80 M3, F82 M4 and F87 M2 Competition/CS — tune, downpipes, cooling and fueling, with the parts for each step. Read more...
BMW B58 turbocharged inline-six engine
BMW B58 Stage Build Guide: M240i, 340i, 440i & Supra
A stage-by-stage BMW B58 build path for the M240i, 340i, 440i and Toyota Supra — tune, bolt-ons, cooling and fueling, with the parts to get you there. Read more...
ZF 8HP automatic transmission used in BMW and the Toyota GR Supra
xHP Transmission Tune Explained: Faster Shifts for ZF-Auto BMW & Supra
What an xHP transmission (TCU) tune does for ZF-auto BMWs and the GR Supra — faster, firmer shifts, launch control, raised torque limiters, and how it pairs with an engine... Read more...
B58 turbocharged inline-six that powers the Toyota GR Supra
Toyota GR Supra Build Guide: A90 B58 Bolt-Ons & Power
A stage-by-stage A90 Toyota GR Supra (B58) build path — ECU unlock, tune, bolt-ons, cooling, fueling and big-turbo power, with the parts to get there. Read more...