Quote:
Originally Posted by Ernest72
Is a catted header worth it? I thought removing that cat is what really gets you the power. Just keep your front pipe cat and you have no smell.
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Cat technology (mainly flow) has come a long way. They were only invented in the 1970's. In the 1990's tuning scene and even early 2000's when I got into it, they were still generally restrictive and going catless did help, even on lower power applications. In the last 20 years, they've just gotten less and less restrictive, probably due to fuel efficiency needs, that you're really only adding 2-3hp by removing them.
With that said, the stock front pipe really cuts down on drone, rasp, and sound level. Usually a catless header is going to be a bit cheaper, plus not increase sound enough for people to complain if they keep a catted front pipe. Catless headers are usually the way to go because of this.