Quieter, cleaner, custom.
Muffler, cat & exhaust.

Louder-than-usual exhaust noise, a rattle or hissing underneath, exhaust smell inside the cabin, reduced fuel economy, or a check-engine light are the key signs.

• Exhaust leaks before the catalytic converter cause smog failures
• Carbon monoxide entering the cabin is a serious safety hazard
• Rotten-egg smell usually means a failing catalytic converter
• Rattling often means a broken heat shield or hanger — inexpensive fix
• California visual smog inspection checks exhaust system integrity

Per ASE A8 engine performance and exhaust standards.

Fouled spark plugs, a failing ignition coil, vacuum leak, dirty fuel injector, or low compression are the most common causes of rough idle and misfires.

• P0300 (random misfire) or P030x (cylinder-specific) codes point directly to the cylinder
• Ignition coil failure is common and often causes intermittent misfires
• Vacuum leaks create a lean condition that mimics misfire symptoms
• Dirty injectors reduce fuel atomization and cause incomplete combustion
• Prolonged misfires overheat and destroy the catalytic converter

Per ASE A8 engine performance and ASE L1 advanced diagnostics.

A proper diagnostic goes beyond pulling the stored code — a technician uses live data, actuator tests, and component testing to confirm the root cause before recommending any repair.

• The code points to a circuit or system, not a specific part to replace
• P0420 (catalyst efficiency) can come from a bad O2 sensor, cat, or exhaust leak
• Live data streaming shows if sensors are behaving correctly under load
• Replacing parts without confirming cause is the most expensive mistake
• Many parts stores offer 'free code reads' — that is not a diagnosis

Per ASE L1 Advanced Engine Performance certification standards.

California emissions warranty covers cat converters for 7 years/70,000 miles on most cars.

• bring vehicle to dealer first under warranty
• we provide pre-warranty diagnostic
• warranty claim doesn't speed registration timeline

Per California Emissions Warranty.

Executive Order from California Air Resources Board.

• Approves aftermarket part as smog-legal
• Label must be visible on part
• Look up at arb.ca.gov databases

Per CARB aftermarket parts rules.

Only if the part carries a CARB Executive Order (EO) number for your specific vehicle — the EO number is what makes it smog-legal when your car is tested at a smog station.

• A CARB EO number is required for the part to be street-legal
• We verify the EO number matches your vehicle before installing any aftermarket exhaust part
• Parts without a matching EO number are a common reason vehicles fail at the smog test station

Per CARB Executive Order database.

Yes — active-duty military and veterans receive a discount on their service visit. Just mention it at the counter and show a valid military or veteran ID; the discount is honored on the spot.

• No coupon or code needed — just mention it at the counter
• Valid military or veteran ID required
• One discount per visit; not combinable with other offers

Shop discount policy — honored at the counter with valid ID.

Yes — students, seniors, and local residents each qualify for a discount on their service visit. Mention the program that fits you at the counter and show a matching ID; the discount is honored on the spot.

• Student, senior, and local resident programs are all honored
• A matching ID is required — student ID, or an ID showing your age or local address
• One discount per visit; not combinable with other offers

Shop discount policy — honored at the counter with valid ID.