[FTI-EDC]

Originally Posted by MellowYellow

I got the automatic for first gear !!! I dont want to lose my first gear by going with to much of a primary.

now if i were for sure going to supercharge my car then yes i would go 1 7/8 but can i tell the future right now ? No


I just want to see what a L99 with a tune , exhaust did with 1 3/4 and compare the 1 7/8 and go from there.

we have seen 41 hp from the ls3 now lets see the l99's numbers with this stuff done to it.

ARH says we use 1 7/8 on the manual ls3 and got this.....then what do you use for an automatic L99? the same as the LS3 they say.

well from what I have heard in the past a car that isnt heavily modded needs a 1 3/4 but if you are one who is going with forced induction and cams and etc then you need to jump to the 1 7/8 for the future.

Don't fear the 1-7/8" primary headers on these engines. They do not loose any low end power when the combination is done right. Besides, who runs a stock torque converter when you mod a car with an automatic?

Ed