G gmbellino Member : 2006 mazdaspeed6 Nov 19, 2011 #1 Will a catless downpipe pass emissions? I live in MA and im looking to upgrade my downpipe but catted DP's are way to much money. Is a catless worth the purchase?
Will a catless downpipe pass emissions? I live in MA and im looking to upgrade my downpipe but catted DP's are way to much money. Is a catless worth the purchase?
