hey, im looking into buying a header, not sure which one, but one with a 2.5 in collector, then a carsound 2.5 cat. converter, and a fujitsubo rm01a? would this all bolt up straight? any input on what i should and shouldn't do? oh and what about 4-1 vs. 4-2-1 header if i plan on supercharging? -thanks for the help

 

Nice choice for an exhaust. I'm pretty positive the exhaust will fit with that cat, but about the headers, go with JDM ITR, 2.5 collector also and it should bolt right into the cat.

 

It sounds alright to me, there is a lot of 2.5 collector headers on the market. As for which design is better, well the 4-1 provides better top end, and 4-2-1 provides better low to mid-range. If you are supercharging then you will already have a strong low-mid-and upper. It is gonna depend more on what plans do you have for this car. Other than that, it sounds like a real mean setup.

 

It depends, do you have an LS, a GSR, or an ITR? For an ITR or GSR I'd run just a JDM DC 4-1 header, for an LS, I'd look at the Comptech Race header, and forego the cat.

 

gsr for me.. as far as headers...im soo confused on what will be best for a sc..

 

ok, so i figured that the jdm dc 4-1 ss headers will be of my choice... would this be a problem running it with a 2.5 carsound cat? (looking for direct fitment)

 

The DC JDM header sports a 2.5 collector, you should be fine.

 

thats what im running, it will work fine.

 

yea the DC jdm header is nice b/c its stainless, but it sits relativly lower to the ground=bad ground clearance over the JDM ITR 4-1. i have and would prefer the jdm ITR 4-1 b/c you can get a bash guard plate from Fastlineperformance.com, to protect it from any dents or encounter with the street! plus the jdm ITR 4-1 sits higher from the ground.

 

would i have to get a carsound cat for an itr so it will bolt up correctly?