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Is the stock H-pipe made out of Ti too or is it just everything behind it? Are any of the replacement X-pipes made out of Ti?
Nope. The only section that is Ti is from the over the axle pipes back.
Dont waste your time or money looking for a Ti X pipe. The hand full of pounds you would save wouldnt be worth the cost. I believe Corsa has an all Ti race system available for big $$$.
The H-pipe also doesn't work too well.
I didn't dyno exhaust parts seperate as everything was welded at once, but I got 8 HP @ 4600 and 5 HP @ 6100 RPM with 3" Random cats and 3" MTI X-pipe.
The exhaust is a lot smoother and the sound is quiet but aggressive up top.