would i see a change in horsies if i changed my stock si intake manifold for a z6 or y8 manifold?

 

they are better flowing manifolds yes, but you honestly won't feel much of a difference.

 

so with better flow does that mean my mpgs would go up? Also I figured it would save me some time to do it now cause im doing a mini me swap in the near future.

 

nah it's not going to affect your mpg. changing your driving habits will though lol.

 

haha, well im not gonna change that.

 

Not on a stock setup, no. However they are better manifolds.

 

alright well im gonna be building my motor soon while in the process of the mini me and im thinkin about ditching my y8 manifold for a skunk2 manifold, along with cams and camshafts and high compression pistons. Anyone wanna estimate the numbers id put down to the wheels?