Which configuration on the headers is better for torque and horsepower on my 01 type-r? Is there a 4-2-1 JDM header or are they only 4-1?

 

Just get the Hytech headers

 

I have never heard of those. Why do you reccomend those headers?

 

best 3 headers on the market:

Smsp
Hytech
Toda

I suggest search the board for "header(s)" and these brands and you'll find more answers.

 

check out the header test in my sig.

 

I see you haven`t get your question answered, butz I agree... Hytech seem to be one of the best header.... Quality and gains included.

But regarding the design:

The 4-1 will free more top end power, which is good for drag racing and tracks with flat ins and flat outs (so you can take curves at high revs).

The 4-2-1 design is good for some gains in the midrange. You feel the difference when you often have to press and lift the gas pedal at low/mid range.
It`s good for WRC and every other tracks where you are forced to let the revs fall down and you simply need torque at 4k
For some reasons the 4-1 makles better peak power than the 421.

But both have their right to exist.

I hope, this helps a bit