It is similar to the SHM price. I expected the final price to be similar to that, but not the group buy price. The final, non GB price is indeed $1700. These are also unforunately the only equal-length headers for the M6. And the only other headers on the market are shorty MSDS and DC Sport, but neither of which can claim any considerable gains.
Also keep in mind that the full package comes with a new alternator bracket, y-pipe with highflow cat and a kit to extend the O2 wires. For an introductory price of $1300, there will be enough M6 people to turn a profit. But I still think they're pricing too high and turning off a lot of potentional customers.
I don't think they fiddled with any A/F at all though, I don't know where that idea came from. I think the dyno was on a well-broken in, but bonestock, '05. They commited the cardinal sin of estimating BHP with their intake (24HP total gain overall, more at points in the curve) AND the headers. They also do a lot of work on Altimas so that comment probably just meant they dynoed WHP higher than a stock Altima SE-R.
