I know this doesn't help with your decision, but I have the MJS race header and I feel you would be much happier with it. It is better because you don't have to cut up your stock system...the headers are just a straight swap then you can send Mike your stock stuff and make a little money back.
I have a before and after dyno but the after is with a PCIII, slip on, and the headers VS stock. I was pulling 102HP stock and with those three items I jumped up to 111HP and I am running wicked rich at 8k and above.
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06 Subaru WRX - Far from stock
07 Yamaha R6
- Painted aux light
- Genuine Yamaha pass. peg hole covers
- Hotbodies front flushies
- Termi gp slip on
- MJS race header
- PCIII
- Pirelli Corsa III tires
- relocated tag
- gregs customs butt plug (tag hole cover)
- Domo wrist band to cover front brake res.
- Red Clear Alternatives tail light
- Clear/Black Stompgrip
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