I'm pretty sure that the tri-y does a better job at scavenging exhaust gasses. The exhaust pulses blend together a little better than with a 4-1. Just my observation.


BTW, that ZXtuner header worries me. It doesn't have a flex section anywhere. If your muffler hits something, isn't there a HUGE chance that you will crack the weld on the head flange?


BP

Ben ---'96 Contour GL * Zetec ATX * Tan on Black steelies--- +++JRSC M62 Under Construction+++ My big-a$$ mod list.