hand built header to boost the torque curve on the gsx-s1000fa, it will probably require a retune, as I had a reflash/tune when I made it, makes the curve bulge between 4-7k rpm, unlike the hole that exists there with stock and most aftermarket exhausts, it can come with a s / steel muffler, I used on it , but its not a light muffler.
I've made some new headers to suit my engine mods, pipe is a one price steel tube header, it's a lot lighter than stock, has a 53mm I'd exit tailpipe. $300
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