mike991

I have a 99 Formula M6, I'm looking to add American Racing Headers with Catted Y or SLP new design headers, and I can't decide on which one to buy yet. My current mods right now are SLP flow pack, SLP cat-back, LS6 intake, and a tune. I'm making 327 RWHP and 343 ft lbs torque. I'm just wondering by adding headers with the catted Y, how much hp will I be getting with the tune with either one of those headers? And with headers do you think I will be able to get into the 12's with these mods? Thanks.

RaggedRides

iTrader: (8)

You should be able to snag 12s already if you can hook and shift. A full exhaust usually nets anywhere from 20 to 30 horses. Sometimes you'll see people gaining a little more, sometimes less.

mike991

Thanks for posting man, I'm having a hard time trying to decide to do either long tube headers or a cam for my next mod, I'm trying to come up with the right set up to hang with my uncle's 03 cobra that will be pullied soon in the spring. I just don't want to embarrass myself when we race, haha.

RaggedRides

iTrader: (8)

I'd go with the headers first. You'll never see the cam's full potential without first opening up the exhaust side of things. Not only do you gain a nice bit of power, but the sound alone is worth the while.

For what it's worth, I ran a best of 13.4 at 104 and a 2.0 60ft with a lid and no muffler. After adding a full exhaust, I've managed a best of 12.9 at 106 with a 1.9 60ft. My car runs rich as hell, so times should improve with a little tuning.