hi there,
just wanting to know which headers should i use for smooth reving up to 8,400RPM. 4>2>1 or 4>1??? has everything changed to aftermarket parts from bottom to top. Not a sleeved engine but only using B16B cams at the moment. Thanks


Modified by JC_1 at 7:34 PM 9/27/2006

 

your stock valvetrain won't really make power up that high, why do you want to rev that high?

 

sorry, i was suppose to say aftermarket parts. Sorry for the misunderstanding

 

i just got some 4>2>1 headers with a 2.45 collector. WIll this benefit??

 

Low to mid range. If you want up high power, 4-1.

 

a 4-1 header benefits top end slightly more than a 4-2-1 which is more midrange oriented. you might want to look into a 4-1, but it wont be too much more of a difference.

 

ooh!!! ok then, but what if the 4>2>1 has a 2.5 collector?? same as 4>1 and collector of 2.5?? They wont be much difference?? i was planning to put some JUN3 cams, so it is a ok choice getting 4>2>1 headers??