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07 · EX System
Exhaust and emissions
5 part types · what each does and where to compare prices
- 01Catalytic converterCleans the exhaust gas. Converters are certified by vehicle and by state.
- 02MufflerQuiets the exhaust. Match inlet and outlet size and position.
- 03Exhaust manifoldCollects exhaust from the cylinders. Cracks often show up as a ticking sound on a cold start.
- 04EGR valveFeeds a measured amount of exhaust back into the intake to lower combustion temperature.
- 05EVAP purge valveLets fuel vapor from the charcoal canister into the engine. A common cause of evaporative system codes.
Before you order
- Catalytic converters must meet your state's rules; California and some other states require a CARB-approved unit.
- Note which sensor bung and flange types your pipes use before ordering exhaust sections.