Downpipes
What Are Catless Downpipes?
Catless downpipes remove a catalytic converter, which can affect sound, smell, codes and legality. Learn what to check before buying.
Technical guides
Guides
Fitment, materials, dyno data and tuning answers from the people who build the parts. Written by AZ Motorsport in Québec.
DownpipesWill an O2 Sensor Spacer Pass Emissions?
No, an O2 sensor spacer will not automatically make a car pass emissions. A pass depends on the vehicle, catalyst, codes, readiness status, inspection...
DownpipesHow Much Is an O2 Sensor Spacer?
An O2 sensor spacer is usually a low cost part, but the real cost is diagnosis, installation and the risk of buying the wrong...
DownpipesAre O2 Sensor Spacers Legal?
O2 sensor spacers are not automatically legal or illegal in every situation. Use this guide to check emissions equipment, diagnostics, local inspections, and downpipe...
DownpipesWhy Is Car Tuning Illegal?
Tuning laws depend on emissions parts, noise and where you drive. Learn what can make a tune illegal before changing your car.
ExhaustWhen Is an Exhaust Manifold Leak Serious?
A manifold leak can sound like ticking and let fumes or heat escape near the engine. Learn when to stop driving, when to book...
ExhaustDoes a Stage 1 Tune Make a Car Louder?
A Stage 1 tune may change sound only in specific ways. Learn what affects volume, pops and drone before expecting a louder car.
ExhaustDo I Need Exhaust Manifold Heat Shield?
You usually need the exhaust manifold heat shield if the car was designed with one. Learn what it protects, what rattles mean and when...
CanadaAre Downpipes Legal in Canada?
Downpipe rules depend on emissions parts, noise and province. Learn what to check before you buy or book an install in Canada.
ExhaustWhat Is an Exhaust Manifold?
An exhaust manifold collects gases as they leave the engine. Learn what it does, how it differs from headers and when leaks matter.
DownpipesAftermarket Auto Programmers & Tuners vs ECU Tuning: What to Know Before Buying or Booking
Compare aftermarket auto programmers, chip-tuning modules, custom ECU tuning and dyno/road-log tuning before buying parts or booking a tune in Quebec.
BrossardModified Exhaust Brossard Price Guide: What Affects Your Quote?
Compare modified exhaust Brossard price factors for repairs, mufflers, cat-backs, downpipes, headers and fabrication before asking for a quote.
