ok today im thinking about running an 2 1/2 inch pipe from the cat to a strait through muffler.i was wondering if this would cause my ports to not open? because of no backpressure? please let me know thanks guys!

Dustin,

 

if you still have the cat in there they should open up fine

 

wow i got 2 1/2 inch piping from the cat all the way back too an straight through muffler and its sooo nice!when i rev it up and let it fall it pops and backfires...

 

I have 2 1/4" mandrel bent pipe to two SuperTrap mufflers on mine. I can vary the plates to adjust the backpressure and sound level. It’s has a nice tone and it not that loud.

 

the racing beat 3" full exshaust is real nice =) good for flames too