im gettin mac headers with true duals. (might go long tubes), and i plan on going with a new lid and porting the TB thats it. now i want to get 400whp, would a 75 shot do it? would a 100 shot? its a NOS dry shot into the airbox.



i believe i have ls6 intake as well. its a 98 ws6 m6 with 51k original

 

Personally, I think it's kind of a waste for a 75 shot. Put the 100 in. Still way conservative and no timing mods really needed. Change out your plugs though.

oh, and make sure you're NOT running a programmer or 'chip'. They advance the timing. bad thing.

 

https://ls1tech.com/forums/nitrous-oxide/596175-spraying-top-400rwhp-how-big-can-i-go.html