head pipe diam

[cwkerr007]

i'm on the fence trying to get details on 4-1 headers i don't want to spend all that money without knowing i'm gaining perf does anyone have the head diam specs on the different brands dragstar,cobra,delv,morley,and any others that might have the larger i.d. pipes any help would be great thanx

 

[[email protected]]

Sorry, I don't have head diameter specs.
Is your engine fairly stock. If so, base your pipe decision on looks/sound. There isn't enough of a difference in power between all the different FULL exhaust systems to base your choice on anything else.

See this recent post:
http://vmaxforum.net/showpost.php?p=470339&postcount=33

 

[Fire-medic]

Sean Morley recently posted-up the difference, it was something like 1.5" vs. 1.625" You wouldn't think it makes a big difference but it does.

 

[Redbone]

There are a lot of variables when looking at performance gains, The stock head pipes have a inner pipe so the outside measurement will be larger. Read Sean Morley's posts in Mike's linked post to gain some insight as to where your performance is typically at stock and where the aftermarket full exhausts can take the performance.