A little info that might help you in the long run. I just got off the phone with SPMotorsports. I'm doing a bunch of upgrades to my svt, one of which was going to be a superchip. At $225 I figured it was a decent price for the amount of hp gain BUT the guy tells me that if you install MSDS headers (which I have on order already) Superchip charges and additional $250 for custom programming. I'd love to chip it but I don't think its worth almost $500 so screw it. Just so you know if you do have or are planning on getting MSDS headers the chip is gonna cost ya.