4-2-1 vs 4-1 HEADERS!!

[Sid77]

In reply to:

"intake means you'll hydrolock your engine? no.

get a bypass valve if you have a cold air intake or get a ram air intake..."

Although a bypass valve HELPS it does not completly prevent hydrolocking compared to the stock setup.

Also in reply to:

"im guesing you aren't sure what a header is, its the part on you engine that lets exhaust move out and down to you cat, look under your car and you'll be able to see the end part of it"

I understand what a header is I meant to refer to a performance header sorry bout tha

[Sid77]

What are the disadvantages of a 2 peice vs one or are there any? thx

[PWMAN]

Easier to install mostly
no performance gain that I am aware of

[Sid77]

dam i'm full of questions but does an aftermarket header usually mount up to the stock exaust system(im going to put a catback on after the header)cuz i don't have my catback yet and i wan't to make sure it will fit

[smokey8890]

there is a couple of reason you don't see most companies have OEM headers. Emission is a big thing and its a lot more durable and cheaper to manufacture our regular manifold than the tubular design.

[B16EJ1]

Originally posted by Sid77
dam i'm full of questions but does an aftermarket header usually mount up to the stock exaust system(im going to put a catback on after the header)cuz i don't have my catback yet and i wan't to make sure it will fit

No because it doesn't mount up to your cat back. It mounts up to the cat and yes most of them mat to your stock cat. The problem lies when you get a " race header " or a 98 JDM ITR header. They have a 2 1/2 in collector. In this case a new cat or flange is needed.