How Important Is An Highflow Cat..?

[WazR32GTSt]

i had a stock cat that was gutted and i replaced it with a 3" xforce cat. i was told that because of the restrictive mesh, i would lose power...

there was absolutely no noticeable difference in power. plus, now i can sleap at night becaue i'm not pissing on the ozone layer as much anymore

[Al]

If you have an antilag system you can not run a cat.

Flames out the exhaust means; your "cat" is only a shell, as all the insides has crumbled and been blown out the exhaust.

You replace the current "cat" with an original one or cheap hiflow, then you'll loose plenty of power.

You replace with a GOOD quality hi-flow, you'll loose very little power, but you can't run the antilag as this will distroy the cat (and possibly your turbo) in no time.

Here are my results:

- Blue line: New Exhaust sytem; Apexi cat-back (with one straight through muffler and one canon muffler), and a super hi-flowed cat.

- Red line: Previous Exhaust system: 5yr old cheap hi-flow cat, with 2 straight through mufflers and one resonator.

I believe more than 95% of the gain was due to the cat.