help with cat and muffler

[Gavinstuckey]

What would produce the most power?
No cat or muffler
No muffler
Muffler with no cat

 

[sctrsk]

if they aren't clogged, you are talking probably under 5 hp gain. You wont be changing anything in the ecu to take advantage of the changes you make, but im sure it will have a nice annoying drone on the highway.

what would produce the most power?
1) supercharger
and then wayyyy down the line
2) headers and a freeflowing exhaust
3) normal engine maintenance
4) a stiff tailwind
5) stripping the interior
6) maybe removing the cat, maybe

 

[T4R2014]

Put a dildo in the tailpipe. Backpressure is necessary.