Quote:
Originally Posted by Grenade180sx
port the stock exhaust mani.. ull make more power then any tubular. i have seen many dyno sheets with stock to tomei manis and hks, ud be surprised at what the stock cast irons ones can do!
they dont crack A problem with tubular ones 
the hold heat better, which means lower engine bay temps and better exhaust flow.
port the bitch! and have fun |
You know a spot that can do it?