Wow .. that kit really sucks. For the 410 kit, you get a air filter and an exhaust. What a ripoff. I have that on my truck. Doesn't do much other than sound good.
The 510 adds some head work .. I highly doubt it will see anywhere near 510 hp. Maybe 400.
Speculation and rumor?
The '05 is coming with scoops and a new rear fascia to allow the exhaust to exit on both sides, as well as the LS2 coming standard.
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