Frequently Asked Questions (FAQs)

All vehicles sold in the United States have a unique drive-train identifier called the "Test Group" or "Engine Family" Number

Code P0420/P0430 may mean that rear O2 sensors report to the engine control module that the catalytic converter is not doing it's job properly

 To determine the correct catalytic converter part , you will need its make, model, model year, engine size, and test group/engine family number

After you check the dealer or repair shop for CAT and not available, then contact the C.A.R.B Referee. 

Differences between a Muffler Delete and a Resonator Delete. Which one you should do to your car's exhaust 

The differences between H-pipes and X-pipes and their effect on exhaust scavenging and performance.