[ACT86]

Originally Posted by YCK

A bit off topic, but why catted? Is this a restriction because you are in ACT? Catless Headers + E85 is the sweet spot for NA. Check out Steve's article if you haven't yet: https://www.ft86club.com/forums/showthread.php?t=81493

I’d only change it for sound mate. Not looking for power, also not keen on a tune or removing cats (legalities / insurance). Considering actually having the stock header modified (by lengthening two pipes). That way I’ll retain the factory cat and not require a tune, but get a little of the boxer rumble. As I understand it the OEM 17+ header flows as well as the aftermarket Catted headers (which often still throw a code), so figure it’s the simplest way to get a bit of rumble. Still not certain I’ll bother though.