Cadillac STS Forum 2005 through 2012
I'm currently looking into a few things for my 4.6
-Timmy's ported throttle body $400
-Ported intake manifold $200-$400
-Ported heads $2k roughly
-Custom headers (maybe, somewhat cost prohibitive) $2k-3k at least.
I'll be topping these off and bringing it all together with a tune, ideally a...