Ok so they dont really look alike but performance wise are you taking that much of a plunge going to the cast piece?

WOnderin how big of a dif it makes from going fromt he 4 large primarys on the reg-Sidewinder to the single pipe of the Cast.

Not trying to create dimeaner between products just trying to find out will it be worth it to wait and just get the stainless piece.

will be going on a street car.

 

Cody said that the cast sidewinder will flow just as well or even a little bit better than welded version. Also said that for turbo, larger diameter runners will just create more turbulence for the airflow. So its pretty much just preference. You want to save a little bit of money - buy the cast sidewinder. You want more bling factor and willing to spend some extra cash - buy the welded sidewinder.