i was plannin on puttin on a stock 98 USDM header and catback on my 01 gsr. do you guys think this will bring a noticable improvement in performance?

btw, the header is not the JDM header, it is the USDM cast iron exhaust manifold, taken directly from a stock USDM 98 ITR.

 

has anyone gone with this setup?

 

I am looking for a ITR header. I have a friend that was running one on his GSR and loved the difference. The ITR header gives you more low end Torque and less highend horsepower, but for dragging and having fun around town the ITR is the way to go. Good luck with it. If you know of any other ITR headers for sale let me know.

 

sounds good to me. thanks.

 

are you talking about the USDM one or the JDM 4-1 ITR header?

 

USDM header will bring you .5 HP, lol seriously IF that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMAGR &raquo;</TD></TR><TR><TD CLASS="quote">I am looking for a ITR header. I have a friend that was running one on his GSR and loved the difference. The ITR header gives you more low end Torque and less highend horsepower, but for dragging and having fun around town the ITR is the way to go. Good luck with it. If you know of any other ITR headers for sale let me know.</TD></TR></TABLE>


i just put a type r header on my ls. i was trying to find a stock ls header because i am starting to return my car to stock, but i found this type r one for $10 locally. keep looking and im sure you will find one.

 

You won't notice any difference.

 

im guessing jdmmagr was talkin about the JDM header then?

orange - did you notice any difference in your car with the itr header?

 

is your icon the guy from punch out?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by smooz EK &raquo;</TD></TR><TR><TD CLASS="quote">im guessing jdmmagr was talkin about the JDM header then?

orange - did you notice any difference in your car with the itr header?
</TD></TR></TABLE>


well i went from a 4-1 R1 brand (shitty ebay brand) header to the stock itr header and it is quieter, but i really cant tell the performance difference with the butt dyno. i think the R1 header added a few more hp since it was lighter and had larger openings, but i really cant tell.

 

ic...i was thinking that there is no point in me swapping out my stock gsr header for the type-r header if there will be absolutley no improvement. i thought even the us itr header would up the hp a little bit, but i guess i was wrong.

 

just spend the money on an aftermarket header that is meant to give your car a boost in hp. stock exhaust manifolds are heavy and restrictive, even the type r one.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM-Rota &raquo;</TD></TR><TR><TD CLASS="quote">is your icon the guy from punch out?</TD></TR></TABLE>

yep. its lil mac from punch out. my favorite nes game.

 

i read an article in import tuner where they the tested four kinds of DC Headers on a GSR, 4-2-1 two piece, 4-1 one piece, 4-1 USDM ITR, 4-1 JDM ITR. the 4-2-1 had its power speaded out throughout the entire powerband, the 4-1 made more top end power, now the trickey part was the discussion between the jdm or usdm headers, naturally everyone would think that JDM header would make more power, but in the test the USDM header made more power on a stock integra than the JDM header, infact the JDM header made the least max HP than all, Import tuner was describing why it made less power, saying its due to the collector plate at the end of the headers, the jdm header is further back and longer and some other stuff but, my suggestion would be to go with the USDM integra type R header, IT WAS TESTED AND PROVEN BY IMPORT TUNER (kid tested, mother approved)

 

I Must Apologize, it wasnt import tuner, it was the May 2006 issue of TURBO MAGAZINE,
Due to jdm headers larger piping, a stock GSR cant make enough exhaust gas velocity to facilitate for the larger piping, the jdm header was designed for high-compression engines (11.0:1 and higher) so if you have a pretty much stock integra the usdm would be better, "there is no such thing as a miracle header. Variables such as displacement, cam design, compression, cylinder head, etc, must be taken into consideration, the test proves that just because you heard the JDM type R is the best header doesnt mean it is for your application, dyno testing is the only way to know what will work best for you"

Here is what kind of power each header made:
Stock - 165.7 HP 109.2 TQ
4-2-1 two piece 173.1 HP 110.6 TQ
4-1 one piece 173.4 HP 109.6 TQ
4-1 USDM ITR 173.5HP 110.9 TQ
4-1 JDM ITR 168.0 HP 110.0 TQ

 

thanks for that informative reply alex.

but what if there are other variables in my situation. my car has USDM itr cam shafts and cam gears, with a USDM ITR catback and muffler. basically my gsr is stock with some USDM itr parts so i guess it would work together nicely. but the tests shows the USDM header to out perform all the other headers if my car was COMPLETELY.

i should go pick that issue up.

 

"Due to jdm headers larger piping, a stock GSR cant make enough exhaust gas velocity to facilitate for the larger piping, the jdm header was designed for high-compression engines (11.0:1 and higher) so if you have a pretty much stock integra the usdm would be better"

i do not agree with that. I have seen many dyno where the jdm 4-1 header improves whp over the stock oem header on the B16, B18c1 and b18c5

 

can anyone else vouch for either view?

 

anyone else read that article?

 

forget the article, with your mods grab a jdm itr 4-1 or dc jdm 4-1, or if you want a stainless 4-2-1 w/ 2.5 inch collector get a vibrant 4-2-1 jspec header (EXACT same as T1R response header).

 

i wanted to stay legal with it so i dont have any trouble with smog or the po's. the only after market header i was thinkin of was the comptech.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by smooz EK &raquo;</TD></TR><TR><TD CLASS="quote">i wanted to stay legal with it so i dont have any trouble with smog or the po's. the only after market header i was thinkin of was the comptech.</TD></TR></TABLE>

kind of funny you mention that, i have a comptech ss 4-2-1 header and a stock usdm 98 spec header for sale

lmk if interested. and yeah, the usdm itr header does nothing as far as gains