I have a stock LS1. Installed the LS6 Manifold but still have the Stock Corvette exhaust manifold due to living in Cali . questions is how much will i be hurting my cam/Head install due to the exhaust. I heard that these manifolds flow just as good as shorties. Thanks

 

However much horsepower longtubes are good for with your setup.

 

I just wanted to know if its even worth it i guess. I know L/T will get more much more. Im running a 12.7 @ 109mph with my setup now. how much more do you think i can take off?

 

If you can get an inspection sticker I think it's definitely worth it.

Maybe 20-30 hp, 2 or 3 tenths.