hey h-t im new here and i was just wondering if anybody knew the actual hp and torque gain of a oem itr header on a usdm b18c1. ive searched answers for this question but found nothing so far. Also i was wondering if it performed as well as the DC 4-1 header.


Modified by JDMtype Eg6 at 5:06 PM 4/1/2005


Modified by JDMtype Eg6 at 6:30 PM 4/1/2005


Modified by JDMtype Eg6 at 7:00 PM 4/1/2005

 

anyone?

 

if you are referring to the 98+ jdm itr 4-1, expect some decent gains from a factory header

 

If it's going in a GSR, then don't expect it to just bolt right up (unless it's a rather new GSR).

 

i understand its because honda exhaust manifolds have 1.75" collectors and the itr is 2.25", but can i just buy a new catalytic converter so that it will fit with the collector on the header? if i can, what cat do you recommend? also if theres any other difficulties for this installation feel free to post. thanks for the replies

 

Hi there... As I can see your are quite the same as mine... I have many questions for you or anyone that knows about swamping an ITR header on a 96 gsr... What fits, what don't?? Does it worth and if yes how much gain in hp an torque... I know that ITR get its hp and trq curve at a higher rev than a gsr. I also know that if you want to switch to an after market one, only the Toda, Spoon (witch is made by Toda) Comptech, and Jun header worth the money spend... Other brand, mostly 4-2-1 desing will give you gain in low-mid range trque but you'll lose a bit in the top end... 4-1 desing will make you lose a lot in low-mid and if you gain something in top end, it will be 2-3 real hp at the wheel after spending a couple hours on dyno...

Hope someone could help you/me with that