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Old 04-18-2023, 12:11 PM   #16
Dirty Harry
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Join Date: Apr 2019
Drives: 2013 BRZ Satin White Pearl
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Quote:
Originally Posted by Dyniek View Post
What about a catted header? Would it increase performance? I’m just trying to get more torque at the 3-4k and get more linear torque.

And how much did the sound increase in your opinion from catless header? I can’t stand my car’s noise at 90mph, and it’s only a catback.

Also, is the torque difference noticeable a lot? Like for example do you fell being pushed into the seat when accelerating?
I got the HKS GT-Spec catted header, with a custom dyno tune and noticed a significant increase in mid range torque and 11.4kw (15hp) increase at the wheels at the top end. Catless gives you roughly 5hp more from what I’ve read on here. Not much noisier than stock, sounds better though, a bit more “angry” if that makes sense. Changing the headers you definitely notice it more in the mid range, which is where the car needs it most I guess.
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The Following 4 Users Say Thank You to Dirty Harry For This Useful Post:
DocWalt (04-19-2023), Dyniek (04-19-2023), new2subaru (04-19-2023), ZDan (04-18-2023)