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
Fitment, materials, dyno data and tuning answers from the people who build the parts. Written by AZ Motorsport in Québec.
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,...
Compare McLaren 600LT/675LT downpipes with a 600LT X-pipe exhaust by sound, tune/CEL planning, catted-vs-catless choice, fitment checks and Quebec install questions.
Pricing an Audi RS3 downpipe install? Use this 8Y/8V checklist to plan quote factors, tune/CEL risk, catted vs catless choices and fitment before booking.
Shopping for a Lamborghini exhaust in Canada? Use this Aventador, Huracan, Urus and Revuelto quote checklist to compare materials, valves, downpipes, headers, installation, shipping...
Shopping Mercedes E63 downpipes for a W213 or S213 E63 S? Use this fitment-first checklist to confirm chassis, catted vs catless choice, tune/CEL planning...
Choosing between a Ferrari Purosangue exhaust and downpipes? Use this AZ Motorsport checklist to compare sound, valves, fitment, tune/CEL planning and Quebec/Canada ordering questions...
Shopping for GLE63 downpipes? Use this W167 checklist to confirm fitment, tune/CEL planning, catted vs catless choice, install prep and Quebec ordering details before...
A fitment-first BMW M3 exhaust checklist comparing G80/G82 S58 and F80/F82 S55 paths, with exhaust-vs-downpipes planning, tune/CEL questions, daily-use notes and Quebec buyer checks.
Planning a modified exhaust in Quebec? Use this checklist to compare repair, fabrication, cat-back systems, downpipes, headers, drone, CEL risk, quote scope and local-use...
Shopping for a McLaren exhaust system? Match your model family first, then compare race exhaust systems, downpipes, and X-pipes before ordering or booking an...
Buying an AZM catless downpipe? Confirm fitment, tune/CEL planning, O2 spacer expectations, sound, smell, install prep and Quebec road-use questions.
Checklist for planning an Audi RS5 downpipe install, including B9/B9.5 fitment questions, catted vs catless planning, tune/CEL risk, Quebec daily-driver considerations and what to...