The title says it best which would be best an X-pipe without cats or a full cat back with higher flowing cats?

 

Probably about the same, except that to use a X pipe you need full duals, which can be done, but a lot of pain.

 

How do you make it full dules?

 

On a LS1, redo the entire exhaust from the cats on out. Go to a good exhaust specialist and open your wallet wide.

 

Well heres my thing I got the long tube headers and I've seen a x-pipe kit from headers back (without cats which is what I'm going with) go for about $350. My question is what would really offer peak gains a Catless x-pipe or the catback.

ps I don't plain on running the x-pipe all the way back I just want it dumped underneath the car

 

The no cat X pipe set up should result in more power. If you want a strong engine, do not rely only on peak power, you want to make good power throughout the RPM range.

 

ok my bad let me refrase that I'm looking for the best bang for the buck. That better

 

Be sure to check your local inspection laws. I went to get my 94 Z28 inspected and the guy looked under the car to make sure I still had cats installed. He informed me that in Texas that would cause the vehicle to fail inspection.

 

Ya I live here in Texas but it pays to know people in the inspection industry that would pass me so thats not a big deal