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 M3 Exhaust Upgrade Checklist: G80 vs F80, Valved Exhaust vs Downpipes
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.
DownpipesAZM Catless Downpipe Checklist: CEL, Tune, Fitment and O2 Spacer Questions Before Buying
Buying an AZM catless downpipe? Confirm fitment, tune/CEL planning, O2 spacer expectations, sound, smell, install prep and Quebec road-use questions.
DownpipesDownpipes Canada: BMW/Audi Buyer Checklist Before You Order or Install
BMW or Audi downpipes in Canada? Confirm fitment, catted vs catless choice, tune/CEL risk, install planning, and quote details before ordering.
BMWM850i Downpipes: Tune, CEL and Fitment Checklist for BMW N63R Builds
Use this checklist to verify BMW M850i N63R downpipe fitment, catted vs catless choices, tune planning, CEL risk, installation questions and Quebec daily-driver considerations...
DownpipesCatback vs Downpipe: Which Exhaust Upgrade Should Come First?
Choosing catback vs downpipe? Compare sound, CEL risk, tuning needs, smell, daily-driver comfort, and the right first exhaust upgrade for performance cars.
BMWBMW Downpipe Install Near Me: Cost, Tune & CEL Questions Before Booking
Use this BMW downpipe install checklist before booking a local shop: confirm fitment, catted vs catless choice, tune/CEL risk, hardware, diagnostics, and Québec daily-driver...
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...
BMWBMW M5 F90 Downpipes: Install, Tune, CEL and Fitment Checklist
Shopping for BMW M5 F90 downpipes? Use this checklist to plan fitment, tune, CEL risk, catted vs catless choice, install questions and Quebec/Canada considerations...
BMWBMW Downpipe Tune, Check Engine Light and Fitment Checklist
Use this BMW downpipe tune, check engine light and fitment checklist before ordering. Compare catted, 200-cell and catless options, then confirm engine/chassis fitment, install...
ECU TuningTuning Shop Montreal Checklist: Stage 1, ECU Tuning, Dyno and First Questions
Choosing a tuning shop in Montreal? Use this Stage 1, ECU tuning, dyno and hardware checklist before you book.
DownpipesCatted vs Catless Downpipe: Sound, Smell, CEL, Tune and Québec Buyer Checklist
Compare catted vs catless downpipes for sound, smell, CEL risk, tune planning, daily use and Québec buyer checks before choosing the right AZM downpipe.
