4-1 vs 4-2-1

[xplode]

Why am i seeing so many 4-1 headers now.. they say they produce more power than a 4-2-1.. now this seems to make sense to me.. but whats your input on this.. i know fizz youl have somthing to say

[phatdoughnut]

4-1 is just ideal.. flows better.. less time its is crapped into less pipes.. like from 4-2 ad then again from 2-1...

4 into 1 pipe, and out the exhaust... wow how much better flowing does it get?

[h22sparkle]

Its like that with the exahust less stuff floatin around in there to a certain extent. It may not be good for the short run but like on the highway its more beneficial the only thing i dont like about the 4-1 is ground clearance issues if your at where im at you wouldnt want that on your car . Either that or whenever you go out youll be driving really slow.

[91accord4door]

wouldnt you have less backpressure woth 4-1? sounds to me like 4-2-1 is better.i cant wait till fizz tears this thread up.

[phatdoughnut]

Yes it does have less back presure, and so does 2.5 piping... thats why you some times loose some low end power when you put in a header.. and gain some top end..

[xplode]

back pressure is not good..

[91accord4door]

hhmmm i figured the right amount was good.my car had backpressure stock,how is that not good.i know a lot aint good.,but stock they come with backpressure.

[xplode]

back pressure is good.. Too much is BAD and too little is VERY Bad..

[Nycxeracer]

what up, from what I have always known a 4-1 header is for more high end, and a 4-2-1 design is for more low-mid range power. peaCe.

[h22sparkle]

Interesting . I prefer the 4-2-1 overall cause of the clearance issues. And as far as the choosing unless u doin the highway id go for more torque and traction too but with a mix of both 4-2-1 exhaust and the 2.5 exhaust.

[SoySauceCb7]

ok first of all you do need some backpressure but headers would be sufficient enough if you were racing you could have a exhaust plummed out the fender, second 4 to 2 to 1 will give you more torque and bottom end than flat hp and 4 to 1 will give you better top end. so it depends on what you like or where you need your power.

[HondaFan81]

typically...

4-2-1 better for street-use

4-1 on most drag cars


but it does depend on the manufacturer and what they designed it for as well.

[DrLove'sKuDang]

4-2-1 can be most advantageous if its constructed properly... such as a sms or hytech.

and to my knowledge, a 4-1 doesnt exist for our car due to the front torque mount and crossmember being in the way.

[gloryaccordy]

Originally posted by DrLove'sKuDang
4-2-1 can be most advantageous if its constructed properly... such as a sms or hytech.

and to my knowledge, a 4-1 doesnt exist for our car due to the front torque mount and crossmember being in the way.

Kamikaze makes one, and I think Tsudo does too for the 0--0-0--0 engines.

I STILL don't see why if the H-head fits our block the H22 headers don't fit our motors. What's the deal? Is the bolt pattern different? I want some kind of Mugen or Spoon header for the H...

[Slateboy]

The H head doesn't fit our block.

I'm pretty sure the LX/DX exhaust manifold is 4-1.