For you DIY 5.3 guys
ill have more pics up tommorow these are just some rough cuts..lol 



and if anybody ever wondered about the truck mani's primaries and outlet they are 1.63 across and 1.59 up, the outlet specs at 2.25, Comparing the manifolds to the corvette ones, Truck manifolds actually have a bigger I.D primary and same size collector outlet, I will port the Exaust manifold slighlty after i reposition the 02 bung and other things.
Truck mani's.


Corvette mani's

Outer portion measured at 2.55, i couldnt hold the camera and keep my caliper inside but the inner "sleeve" is 2.25
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Last edited by 91parkave; Mar 17, 2008 at 02:37 PM.



