which comptech 4-2-1 do you have (94-99 GSR or 00-01 GSR, Type R)?
did you modify the length of your exhaust to get it to fit?

thanks.

I am trying to put a 94-99 GSR Comptech 4-2-1 (slightly shorter than the 00-01) on my exhaust that is setup for the stock B16 exhaust manifold).

 

is this for b16?> i would say the type R

 

the type r is 4.5 inches longer than the GSR.

i don't know which one will fit better?

 

I have a Comptech 4-2-1 on my B16. I believe it's a GSR one (not real sure, I bought it used), but I also use a testpipe as well. The testpipe is from testpipe.com and made for b-series into EF swaps. It is a slightly tight fit, but it does fit. BTW, the 94-99 model header.

 

i had to put and extra section between the cat and header...forgot how long it was...it also has the O2 bung on the section

 

how much piping did you have to add?

can you give me a guess?

 

if i were to guess about the size of my hand...maybe little over 8 inches(got big hands)...

..tell yah when i get home

 

damn...8 inches?

so to get a 94-99 GSR header to work on an ef, you have to extend the stock exhaust 8 inches?

 

i got a comtech 4-2-1 b16a header. which was for the motor.. mine fits perfectly fine. before that i had 4-1 jdm dcsports type R.. Hung too low.. i was juss bouncing off the ground with it..


[Modified by STK B16, 2:12 PM 4/2/2003]

 

1990 CRX + HCP Mount kit + b16a + USDM Comptech 99-00 Civic Si 4-2-1 header + USDM 90 CRX Si Cat + USDM Greddy MX exhaust for CRX = bolts up perfectly.


Pics in sig.

-Todd


[Modified by Count Blah, 2:32 PM 4/2/2003]

 

on a related topic, with the search function down I can't get answers so I need to know some info on the B16a going into my 91 dx hatch. Rather than make a new topic, I thought I'd post here.

I want an AEM CAI intake and a DC Sports 4-2-1 header. Which model should i get (like, the '00 Si intake or the '91 Si intake, same thing for the header)?

I have a Thermal R&D exhaust already that was hooked up to my stock d15.

Thanks for the help on this important (to me!) question.

 

SeaBass,
For your AEM CAI, you have 2 options. The one for the 91 Si would NOT require you to move the battery and would fit OR 99-00 Si AEM CAI (bigger diameter) and move you battery to the trunk.

Get the DC sports 4-2-1 for the 99-00 Si. You will have to weld into the header for your O2 bungs or you will get parial throttle hesitation.


To wrap up this thread, I have come up with the following conclusion.
99-00 Si, 97-00 Type R, 99-00 GSR headers are all the same length (not height) and will bolt up to the stock civic/crx exhaust.
94-99 GSR headers are 6 inches shorter, requiring one to extend their stock exhaust by 6 inches.