Installing 4-1 headers
 

I was wondering if i have to take out the engine in order to install 4-1 headers. which is better 4-1 or 4-2-1 headers. I might buy some soon.

As I see your profile, you have a 5-speed. So I would suggest the 4-1 headers. The 4-1 headers will produce a greater increase @ a higher RPM. And the 4-2-1 will add low end RPM power. 5-speeds dont really need any more help @ the low end...I really notice a difference since installing mine while in 3rd gear...the power is GREAT. As far as install goes...no you do not need to remove your engine.

Hope this helps

Thanks, that actually cleared something up for me as well.
What kind of exhaust setup do you recommend?
I really like the MBRP off of Speedstate. Do the headers link up or will I have to have some custom work done?

Z?

I have the 4-1 Sr headers and a High flow CAT. And then I had a local shop use 2.5 piping to route to my Apexi N1 exhaust.

Fast.Shark
Did you have to port match to the exhaust manifold?
Does SR give you a gasget for the header?
Did you have any problems hooking it up(relocating stuff?)
Thanks I am thinking of ordering the 4-1 from SR

[ March 02, 2002, 04:17 AM: Message edited by: Tony Montana ]

If I'm not mistaken

The Header re-uses the stock gasket. If your stock gasket is damaged/worn out, a new one would be required.

No porting of the head on the exhaust port side is "required" however it is a task you can decide to do if you wish.

The 4-1 header will NOT bolt to to the stock exhaust. Some fabrication will be required to hook the end of the 4-1 header to the new exhaust. Oxygen (o2) sensor holes will have to be cut out, and threaded nuts either welded on, or threads cut into the hole in either the exhaust pipe, or the header.

Hey Random, wasn't it recommended to replace that gasket for the better with a better one anyway?

Z?

as far as relocating stuff, do you permanently remove the first cat? or relocate it? Will it pass emission? If it had to be relocated, where do you reinstall it. some pics would be nice if there are any. thanks

aktivkontrol-
It is a matter of budget and the condition of your existing stock gasket. If your stock gasket is in 100% pristine condition, you might as well keep it. If your old one is marginal, and you can afford a new one, go for it.

arn-
I don't have any "underbody" shots to post, otherwise I would. Yes, the first cat must be relocated. You can keep both cats, or just one, your call. By law, you need to keep both, but simply moving one is against the law to begin with... If you can afford it, replacing BOTH stock cats with a larger diameter High flow cat to match your exhaust piping is highly reccomended.

I'll snap some pic's of my underbody on Monday. From Engine (top view also) bay back to Exhaust. Here is a "drawing" of my setup:

Click Here

My Second O2 Sensor got relocated BETWEEN High Flow CAT and Exhaust.

[ March 03, 2002, 06:55 AM: Message edited by: Fast.Shark ]