B58
B58 Gen 3 Downpipe Checklist: M340i, M440i, Tune and Fitment Questions
Shopping for a B58 Gen 3 downpipe? Use this M340i/M440i checklist to confirm Gen 1 vs Gen 2 vs Gen 3 fitment, catted-vs-catless choices,...
Technical guides
Guides
Fitment, materials, dyno data and tuning answers from the people who build the parts. Written by AZ Motorsport in Québec.
BMWBMW M340i Downpipe: Tune, CEL, Install and Fitment Checklist
Shopping for an M340i downpipe? Use this BMW B58 checklist to confirm fitment, tune/CEL risk, catted-vs-catless trade-offs, install planning and Quebec daily-driver considerations before...
