JDM DC 4-1 header+2.5" Carsound cat
I'm using the header and an SMS/Carsound cat. Donut gasket and a JDM flange...fits great. The only thing is that the header hangs pretty low. My car is lowered about 2.25" up front, and I have about 3" of ground clearance. I've banged up the header pretty bad, but that wasn't quite my fault. You just need to be aware that as low as your car is, the header hangs even lower. Drive carefully.
And I got my whole exhaust (header, cat, exhaust) replaced at the same time, so I can't really distinguish between the gains from the header, and the gains from the cat, and the gains from the exhaust...you get the idea. Bottom line is there was a noticeable gain, from 4400 rpm up. I'm very happy with everything, except for the ground clearance...which is really in my hands.
And I got my whole exhaust (header, cat, exhaust) replaced at the same time, so I can't really distinguish between the gains from the header, and the gains from the cat, and the gains from the exhaust...you get the idea. Bottom line is there was a noticeable gain, from 4400 rpm up. I'm very happy with everything, except for the ground clearance...which is really in my hands.
I'm using the header and an SMS/Carsound cat. Donut gasket and a JDM flange...fits great. The only thing is that the header hangs pretty low. My car is lowered about 2.25" up front, and I have about 3" of ground clearance. I've banged up the header pretty bad, but that wasn't quite my fault. You just need to be aware that as low as your car is, the header hangs even lower. Drive carefully.
And I got my whole exhaust (header, cat, exhaust) replaced at the same time, so I can't really distinguish between the gains from the header, and the gains from the cat, and the gains from the exhaust...you get the idea. Bottom line is there was a noticeable gain, from 4400 rpm up. I'm very happy with everything, except for the ground clearance...which is really in my hands.
And I got my whole exhaust (header, cat, exhaust) replaced at the same time, so I can't really distinguish between the gains from the header, and the gains from the cat, and the gains from the exhaust...you get the idea. Bottom line is there was a noticeable gain, from 4400 rpm up. I'm very happy with everything, except for the ground clearance...which is really in my hands.
I also have a 2.5 manderbent exhaust. All I can say is Top end power
I'm using the header and an SMS/Carsound cat. Donut gasket and a JDM flange...fits great. The only thing is that the header hangs pretty low. My car is lowered about 2.25" up front, and I have about 3" of ground clearance. I've banged up the header pretty bad, but that wasn't quite my fault. You just need to be aware that as low as your car is, the header hangs even lower. Drive carefully.
looks like i have something else to worry about although the gains do sound good. bishop not wanting to buy this combo for it to look like this:
-tell

[Modified by bishop, 12:17 AM 7/10/2002]
Same here
I also have a 2.5 manderbent exhaust. All I can say is Top end power
I also have a 2.5 manderbent exhaust. All I can say is Top end power
.Notice the dents:
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Well Bishop if you are looking for a header that has the same gains as the 4-1 you might want to look into the Comptech 4-2-1. Has the same gain and same price. although it has a 2" collector, but you will have ground clearance.
you need one of these (its made for JDM ITR 4-1):
Its cheap too, ($39-49)
http://fastlineperformance.com/products.htm
Its cheap too, ($39-49)
http://fastlineperformance.com/products.htm
Well Bishop if you are looking for a header that has the same gains as the 4-1 you might want to look into the Comptech 4-2-1. Has the same gain and same price. although it has a 2" collector, but you will have ground clearance.
Will that header guard work on other JDM headers besides the ITR 4-1?
-tell
Will a 4-1 header for a D16y8 hang that low?
from what i saw from the great header test, the DC JDM 4-1 w/2.5 Collector, made more pwr & torque over the JDM 4-1!
if ur looking for the test, do a search!
vnt
if ur looking for the test, do a search!
vnt
Yea, i been doing research, and i have also asked people around for their opinions. Most people say the same as you... that the DC JDM 4-1 are better.. well thnx
The Great Header Test = http://www.automotiveperformanceengi...om/header.html
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oryanh
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