Thread: What kind of header is better ASP 4-2-1 or protech-fabrication 4-1

What is the best opcion for stock VE only with N1 cams

There have not been any results posted for the protech yet unfortunately.

an honda tri -y like i did modify it and lets go to dyno

I have a protech. I gain bout 6whp from a fuji but i believe it can do better. My motor run a 8cwc so i feel that its probably robbing a few hp cause the weight.

I would prefer a 4-2-1 header!! The gains of the 4-1 is very small at very high rpm only!!! To all other rpm range the 4-2-1 is much better!!

This is such a very vague dumb statement. 4-1 headers can be made to suit any rpm range just as a 4-2-1 header can...

i personally at this point wouldnt go with a asp header. it hasnt made any power on any of the cars it was on to warrant its price brand new.

i would get a custom header made something like the one cory runs, one like kesi made years ago, or the ones jmr is making. these headers have been proven to make numbers on cars.

stratton.

ASP makes more power on my car than Kesi's header, tested back to back on the same dyno

hahaha. you can't be serious

Depends how cheap you can get an ASP header for
If very cheap, they're ok, didnt give me anything over my cheap as chips Xforce header though.