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Old 04-18-2017, 09:22 PM   #22
guybo
Huge E85 fan!
 
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[ame="https://www.youtube.com/watch?v=DXRaboSo70A"]It's gonna be HUUUUUUUUGE! - YouTube[/ame]

Yes, with a tune IT'S HUGE. IMHO gutting and tuning is the single best HP/$ thing you can do. You can get an aftermarket header which can make slightly more power, but many have issues down the road with cracking at the welds and the extra heat can damage coil packs unless you wrap or coat. Gutting the OEM header can retain the OEM heat shielding so there is no extra heat (maybe there's even less heat without the cat?)

either way, if you get a catless header or gut, GET A TUNE to go with it. As for noise- there was a big increase in noise when I gutted the secondary cat. The increase in noise when I gutted the cat in the header was minimal. But yes, it will be noisier either way. But you also get extra burbling, popping and over run sounds too which are nice. and extra stink, which is not nice.
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