Stock exhaust modification. Cat Delete.
 

Has anyone simply deleted the cats out of their Header and Front pipe? Couldn't really find anything on this.

No one??? This really surprises me! I'm highly interested to see if it makes an improvement in power.

^Hello OP, I removed the secondary catalytic converter on the front pipe. I retained the small muffler on the front pipe. Sound wise it is pretty much as quiet as stock, but there is a better response or perhaps a slight gain in power around 2500-3000rpm. Everything else is stock, 6AT

Cheers!

OP, I deleted all the cats and installed Borla UEL headers. Kept the stock muffler setup though. Used the Borla overpipe/frontpipe cat delete combo pipe. Let me know if you have any questions!
[ame="http://www.youtube.com/watch?v=XYwKFBJjn6A"]IMG 0785 - YouTube[/ame]
[ame="http://www.youtube.com/watch?v=2cDD7UpPdrE"]IMG 0784 - YouTube[/ame]

Perrin did this a while back, but did not notice any real performance gains on the dyno. I will have to try to dig up his blog post on that.

I'll agree to that, the ol' butt dyno tells me there is def a little more torque in the lower end, got rid of the dip a little. Nothing drastic though, obiviously.

nelsmar deleted cats off his stock pipes and found with tune it got the same hp as his revworks header and nameless front pipe combo.

http://www.ft86club.com/forums/showthread.php?t=55770

O god someone resurrected this? Looks at the other topics.