I have seen alot of realy nice headers out there and i know some work better on stock engines and some work better on built ones. I waunted to get some oppinions on what yall think would be the best for my settup, and any reasons why. I like the idea of a full merge collector and money is no option.

Here is what i have:
H22a
Mahle gold +10cc pistons
Scat rods
ported head (stage 2)
Fierra valves springs retainers valvestem seals
5 angle on intake and a radious on the exhaust
Block sleeved
head shaved a couple thousanths (dont remember exactly)
Calculated compression with CC'ed head was around 11.5:1
AEM EMS
AEM V2 intake

Have not decided on cams yet but am thinking about going with crower stage 3
Debating between ITB's or ported stock manifold.

 

Something definately custom since you have a ported head and other built components.
RMF is my vote

 

oh yah i am in a 4th gen and am willing to modify subframe but would absolutely love if i didn't need to.

 

randy (RMF) can make you a header that will fit around the subframe....his production peice would suit your motor well....but if you wanted to go more custom he could do that as well....

either way it will make great power...who did your head work?

 

http://sms-products.com/Headers.html

 

Yep, RMF was my choice, and I was in a very similar situation. Built H series in need of an awesome flowing header....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 &raquo;</TD></TR><TR><TD CLASS="quote">either way it will make great power...who did your head work?</TD></TR></TABLE>

I am down in neworleans and the valve jobs were done at shreve automotive and the head was ported by the guys at cycle dynamics. I lost the flowbench charts but the biggest gains where on the midrange flow and the high end was a nice inprovement also. I dont know the numbers on it though. sry