What's up 8th... if I delete my stock catalyc converter would that make any perfomance improvement? Would it sound a bit louder with out it? lmk people ... thankz
I have a custom 2.5 str8 pipe with no resonator ...yeah I want it to sound a little more louder ..thankkz manYes and yes the Cat is the biggest restriction in the exhaust system cause the air gets jammed up there. Also the Smaller exhaust pipe that is being ran stock cause be exchanged out for a larger aftermarket pipe that will yield better gains, not by too much though.
Removing the cat does add sound as well
finnaly someone smart. just cutting the cat out of there does jack. its the whole exhaust manifold aka header that needs to be replaced with a true header to get your massive gains.you will gain hardly anything from simply removing the cat. I've done it and I've dyno tested it. Same peak WHP and barely 6 whp for 200-300 rpms at vtec engagement.
Replacing the stock header and cat together with a race header will yield the best gains.