Because the stock manifolds flow as well or almost as well. The 00-02 model F-bodies flow just as well as shorties so there would be 0 rwhp gains. The 98-99 models are slightly more restictive and shorties would net probably a 5 rwhp gain. However LT headers with ORY has in many cases gained 20-25 rwhp.

If emissions is not a concern then it's a total waste to spend money to gain 0-5 rwhp when 20-25 is obtainable by going to LT headers instead.

 

^Really?? I didn't know the stock manifolds flowed so well
But now that you guys mention it, you NEVER hear of an LS1 w/ shorties, lol.

 

well my firend sure will spread the word now. those camaros are fast stock, thats for sure. too bad it costs so much for upgrades(compared to stangs). ill be in leicester maybe this friday with some other mustang guys. one guy ran 10's yesterday and test and tune night, fast as hell. i hope to be low 12's if im running right now!

 

The only thing worth it he bought was probably the short shifter. I'm sure the car feels much faster, and could explain his .4 tenths drop. Those things make manuals so much easier to drive. One step away from a ratchet shifter almost. Which, btw, would be extremely cool.

 

he hasnt dropped anything yet. he still doesnt have it back. work is in the process as we speak.

 

well, he got it back, sounds sweeter. any guesses as to what he will run in the 1/4 and mph? we hope to go within 2 weeks!

 

I assume your 13.4 was with a fairly crappy sixty.
Drop yours ixty to a 2.0 and you should run 12's with n/p what so ever.
Im thinking 12.7-12.9@108-109.

 

Because unlike the LT1 the LS1's stock manifolds flow good from the factory..Even though there illegal here in jersey guys seem to be passing w/ them because the shops dont know teh differance..If I decide on a LS1 LTs will be one ofmy 1st mods

 

because on OBDII cars most states just check the cpu from the diagnostic port. If it dont throw any codes it'll pass. Unless ofcourse they take the time to put it on a lift to check for cats or emmisions related parts undeneith. I know a couple of guys that used to work at a garage that did inspections. They told me that they did the diagnostic scan then if the car had wheels that you could see the brakes they would'nt bother putting it on the lift.