Has anyone used the speedway motors header kit in a sedan? I've been looking at headers for a while whilst most seem to be targeted at t-birds or pickups there seems to be very little for cars.
I have heard that Ted is about to do testing on some headers as part of his ongoing dyno part evaluation. I understand from the alloy head testing that the non fenderwell Reds headers cause a restriction.
What else is available?
I'm looking at freeing the breathing up a bit I have original 56 single exhaust manifolds running duals off these with pipes coming of where the crossover usually bolts on. I have 57 cast iron exhaust manifolds but using these will require a exhaust change. If I can use some decent headers this will assist in later engine changes and get some breathing happening for now.
Grizzly (Aussie Mainline)