Nissan 370Z Forum - View Single Post - Anyone been thrown a CEL with Berk HFC's?

Micas · 11-13-2009, 12:36 AM

Forgive the noob question, as I'm just starting to read about exhaust systems, but why would you use test pipes? Doesn't that guarantee a fail in emission testing, or do you just swap them out for the stock cat when you test?

11-13-2009, 12:36 AM	#12 (permalink)
Micas Base Member Join Date: Oct 2009 Location: D/FW Posts: 54 Drives: 2004 G35 Coupe Rep Power: 15	Forgive the noob question, as I'm just starting to read about exhaust systems, but why would you use test pipes? Doesn't that guarantee a fail in emission testing, or do you just swap them out for the stock cat when you test?