Question about header pipes...

[SlimJim1284]

If and when I get headers I'm gonna get the rksport ones cause i heard they flow the best and have the best performance. Whats the pipe diameter on these at the end? The part that goes into the cat.

[pigglyroot]

the collecter size, im not sure of, but just about everyone who's bought RK sport headers has had a problem with them leaking bad, i'd ask around and see what thats all about before i purchased them..

[SlimJim1284]

<blockquote>quote:</font><hr>Originally posted by pigglyroot:
just about everyone who's bought RK sport headers has had a problem with them leaking bad, i'd ask around and see what thats all about before i purchased them..<hr></blockquote>

I would have them welded to eliminate that problem.

[1998silverbird]

I have the 3 bolt flange welded on the pipes and the end of the headers and I also use metal gaskets with o rings in between the pipes.. They leak a little but at least I can unbolt them when I drop the motor out the car.. The y pipe is either 2.25 inches or 2.50 inches and 3 inches is the diameter of it when it bolts up to the cat..