Technical guides
Fitment, materials, dyno data and tuning answers from the people who build the parts. Written by AZ Motorsport in Québec.
Shopping an Audi RS3 8Y downpipe or exhaust? Use this fitment-first guide to compare downpipe vs race exhaust upgrades, tuning/CEL caveats, and AZM product...
Shopping Audi RS5 catless downpipes? Confirm AZM B9/B9.5 Coupe and Sportback fitment, race-use notes, CEL/tuning questions and buyer checks.
Manufacturer-direct guide to choosing between catted and catless downpipes: power, sound, emissions and warranty. Dyno-proven, built in Québec — no customs fees in Canada.
