Posted by catfish on January 08, 2002 at 20:09:14:
Im looking into building a freer-flowing exhaust system from the (stahl) headers back on a 530. The stock setup is two pipes all the way back with 2 mufflers. Would a collector going two-into-one pipe of about 2.5" give me the same flow as continuing two pipes (1.75"??) all the way back, or would I be better off with the two into two?? Thanks for any advice.