Getting new exhaust put on the car. Have right now, OEM manifold and cat, 17" glass-pack, dueled out the back. 2.25 piping from the duel out.

Going with a obx short 4-1 header, Reg or hi-flow cat, 16" resonator, single out the back. 2.25 mandel bent piping all the way though.

Now my ? The local performance muffler shop is saying that a regular cat has the same waffle material inside as a hi-flow. Whats difference from a reg to a high-flow is that a hi-flow is longer and can absorb more air for the coveter process. Make sense?? Is there any benefit to spending the extra $50 bones. Not to me but some info would be greatly appreciated

 

The only thing is that the hi flow cat is 2.5 inch diameter and its bigger in general. Besides that its the same thing as a reg. cat.

 

Thats what i thought. Regular cat with 2.25 in and out.