Fast burn GM heads
Burning Brakes
Joined: Sep 2005
Posts: 895
Likes: 4
From: whitman massachusetts
Fast Burn Heads/Headers
Let me be clear that I am no expert on headers, this is just my .02! While any header may bolt up to the fast burn heads, I assume by the fact you have them, that you are looking for increased performance. If you restrict the exhaust flow from the heads by any appreciable amount, by using the wrong size/shape header flanges, you are robbing the engine of the power that these heads were originally designed to make. Your header choice does not have to have a D-port flange to match your heads, but it should have ports large enough, not to cover the head ports and restrict flow. Good Luck on your search 
Drifting
Joined: Apr 2006
Posts: 1,911
Likes: 2
From: gold coast queensland
willem is right. i have fast burn heads and used d-port header gaskets with d-port headers. now go use oval headers yada yada and you will be cutting off the corners restricting the flow. still work but not optimum .
