USDM vs JDM Header...

***P1NGP1NG*** · 10-07-2008, 02:54 AM

Hi guys...

i'm in the market for a RH.
i live in socal where i heard we need cat or we can get ticket.

as you guys now, all aftermarket 4-2-1 header for USDM car will remove the cat.
(Header - cat back exhaust)

however, for FD2 CTR, you can install an aftermarket header without removing the cat.
(Header - cat - cat back exhaust)

here is the pics of the mugen rr set up.

my questions are,
is it possible to install JDM 4-2-1 header + JDM cat + USDM exhaust in our car?
would it be legal if i use JDM cat?

how nice to have the performance and stay legal...

i really appreciate your comments guys...
thanks...

***Zeuceone*** · 10-07-2008, 02:57 AM

well according to the law removing/messing with the oem cat is illegal.

SIg · 10-07-2008, 03:27 AM

get the vibrant RH with high flow cat.

Lev · 10-07-2008, 03:28 AM

O this is interesting, in for results

vingavina · 10-07-2008, 03:30 AM

Quote:

Originally Posted by SIg

get the vibrant RH with high flow cat.

chugiboi · 10-07-2008, 03:30 AM

not sure if anyone ever try that yet.

***P1NGP1NG*** · 10-07-2008, 03:37 AM

what about getting JDM FD2 4-2-1 header and JDM FD2 cat ?

i was thinking about that but im sure it will be so expensive..

Asif22 · 10-07-2008, 03:45 AM

hi flow cat still won't pass...you can't tamper with it...get a comptech shorty

ebphoto · 10-07-2008, 07:43 AM

well... the toda header and exhaust(built for the jdm ctr) are being sold as a kit for the fa5, due to the fact that the header is a different length than our stock one with the cat, and the only thing different would be the hangers on the exhaust....
so id think jdm header, jdm cat, and jdm exhaust would work with new hangers welded on the exhaust?..

twfa1 · 10-18-2008, 09:03 AM

I was thinking about the fd2 header. You'll need possibly cut the mid-pipe along with an custom length cat. I stopped thinking about it when I was quoted $1300 for it...

I was hoping it would be around $400 like jdm 4-1 98 spec ITR header.

***P1NGP1NG*** · 10-18-2008, 04:07 PM

im not getting jdm header an cat since it will expensive and ILLEGAL in california.
i go with T1R RH + magnaflow HFC.

e60.deluxe · 10-18-2008, 04:19 PM

replacing the cat with a JDM cat is as illegal as not having one.
in CA, its stock, comptech shorty, or bust.

e60.deluxe · 10-18-2008, 04:19 PM

Quote:

Originally Posted by P1NGP1NG

im not getting jdm header an cat since it will expensive and ILLEGAL in california.
i go with T1R RH + magnaflow HFC.

also illegal in CA.

***P1NGP1NG*** · 10-18-2008, 04:26 PM

yeah but its still legal in 49states and canada.
i dont know if the jdm set header and cat will be legal in us and canada.

anyway, i'm going for full T1R I/H/E.

e60.deluxe · 10-18-2008, 04:27 PM

basically, anything that has to do with a cat that is not OEM or does not meet the same specs as the OEM, is illegal.

***P1NGP1NG*** · 10-18-2008, 04:31 PM

well, i dont know the truth about that.
but if you go to magnaflow's website it says that it is 49state legal.
anyway, i just want to minimize the risk.

2likru · 10-18-2008, 08:39 PM

Quote:

Originally Posted by ebphoto

well... the toda header and exhaust(built for the jdm ctr) are being sold as a kit for the fa5, due to the fact that the header is a different length than our stock one with the cat, and the only thing different would be the hangers on the exhaust....
so id think jdm header, jdm cat, and jdm exhaust would work with new hangers welded on the exhaust?..

Evan is absolutely correct. The jdm fd2R has a cat of a diffrent length than our fa5. So even if you were able to source an full jdm exhaust system it wouldn't work unless you fab up some all new hangers from front to back under the car. Depending on you it my not be worth the expense.

Si Speed 317 · 10-18-2008, 08:46 PM

taffysi · 10-19-2008, 02:37 AM

Quote:

Originally Posted by P1NGP1NG

well, i dont know the truth about that.
but if you go to magnaflow's website it says that it is 49state legal.
anyway, i just want to minimize the risk.

Depends on what product magnaflow is selling. Any "race" header is illegal in pretty much all states.

Harry · 10-19-2008, 03:38 AM

In California with any OBDII car you can't mess with the cat. So even if you have a high flow cat it's still illegal so I think you might as well just go catless.

10-07-2008, 02:54 AM	#1 (permalink)
*P1NGP1NG* -=[P1NGP1NG]=- Join Date: Jul 2007 Location: 626 SoCal Posts: 1,413 Ping Ping iTrader: 3 / 100%	USDM vs JDM Header... Hi guys... i'm in the market for a RH. i live in socal where i heard we need cat or we can get ticket. as you guys now, all aftermarket 4-2-1 header for USDM car will remove the cat. (Header - cat back exhaust) however, for FD2 CTR, you can install an aftermarket header without removing the cat. (Header - cat - cat back exhaust) here is the pics of the mugen rr set up. my questions are, is it possible to install JDM 4-2-1 header + JDM cat + USDM exhaust in our car? would it be legal if i use JDM cat? how nice to have the performance and stay legal... i really appreciate your comments guys... thanks... __________________

10-07-2008, 03:37 AM	#7 (permalink)
*P1NGP1NG* -=[P1NGP1NG]=- Join Date: Jul 2007 Location: 626 SoCal Posts: 1,413 Ping Ping iTrader: 3 / 100%	what about getting JDM FD2 4-2-1 header and JDM FD2 cat ? i was thinking about that but im sure it will be so expensive.. __________________

10-18-2008, 04:07 PM	#11 (permalink)
*P1NGP1NG* -=[P1NGP1NG]=- Join Date: Jul 2007 Location: 626 SoCal Posts: 1,413 Ping Ping iTrader: 3 / 100%	im not getting jdm header an cat since it will expensive and ILLEGAL in california. i go with T1R RH + magnaflow HFC. __________________

10-18-2008, 04:26 PM	#14 (permalink)
*P1NGP1NG* -=[P1NGP1NG]=- Join Date: Jul 2007 Location: 626 SoCal Posts: 1,413 Ping Ping iTrader: 3 / 100%	yeah but its still legal in 49states and canada. i dont know if the jdm set header and cat will be legal in us and canada. anyway, i'm going for full T1R I/H/E. __________________

10-18-2008, 04:31 PM	#16 (permalink)
*P1NGP1NG* -=[P1NGP1NG]=- Join Date: Jul 2007 Location: 626 SoCal Posts: 1,413 Ping Ping iTrader: 3 / 100%	well, i dont know the truth about that. but if you go to magnaflow's website it says that it is 49state legal. anyway, i just want to minimize the risk. __________________

10-07-2008, 03:27 AM	#3 (permalink)
SIg Senior Member Join Date: Jan 2007 Posts: 1,010 iTrader: 0 / 0%	get the vibrant RH with high flow cat.

10-07-2008, 03:28 AM	#4 (permalink)
Lev Senior Member Join Date: Nov 2007 Posts: 693 iTrader: 0 / 0%	O this is interesting, in for results

10-07-2008, 03:30 AM	#6 (permalink)
chugiboi Senior Member Join Date: Aug 2007 Location: stockton ca Age: 22 Posts: 3,836 chue hang iTrader: 3 / 100%	not sure if anyone ever try that yet.

10-07-2008, 03:45 AM	#8 (permalink)
Asif22 Senior Member Join Date: Jul 2007 Location: United States Posts: 4,110 Asif El-Mubaslat iTrader: 2 / 100%	hi flow cat still won't pass...you can't tamper with it...get a comptech shorty

10-07-2008, 07:43 AM	#9 (permalink)
ebphoto Senior Member Join Date: Oct 2007 Location: panhandlingg.. Age: 24 Posts: 1,603 Evan iTrader: 1 / 100%	well... the toda header and exhaust(built for the jdm ctr) are being sold as a kit for the fa5, due to the fact that the header is a different length than our stock one with the cat, and the only thing different would be the hangers on the exhaust.... so id think jdm header, jdm cat, and jdm exhaust would work with new hangers welded on the exhaust?..

10-18-2008, 09:03 AM	#10 (permalink)
twfa1 Senior Member Join Date: Aug 2007 Location: toronto Posts: 481 08 si sedan iTrader: 0 / 0%	I was thinking about the fd2 header. You'll need possibly cut the mid-pipe along with an custom length cat. I stopped thinking about it when I was quoted $1300 for it... I was hoping it would be around $400 like jdm 4-1 98 spec ITR header.

10-18-2008, 04:19 PM	#12 (permalink)
e60.deluxe Senior Member Join Date: Apr 2007 Location: Lake Forest, CA Age: 23 Posts: 5,906 iTrader: 3 / 100%	replacing the cat with a JDM cat is as illegal as not having one. in CA, its stock, comptech shorty, or bust.

10-18-2008, 04:27 PM	#15 (permalink)
e60.deluxe Senior Member Join Date: Apr 2007 Location: Lake Forest, CA Age: 23 Posts: 5,906 iTrader: 3 / 100%	basically, anything that has to do with a cat that is not OEM or does not meet the same specs as the OEM, is illegal.

10-18-2008, 08:46 PM	#18 (permalink)
Si Speed 317 Senior Member Join Date: Apr 2007 Location: Long Island Posts: 4,350 Dan iTrader: 30 / 100%

10-19-2008, 03:38 AM	#20 (permalink)
Harry Senior Member Join Date: Mar 2007 Location: Morgan Hill/San Jose Posts: 2,375 iTrader: 6 / 88%	In California with any OBDII car you can't mess with the cat. So even if you have a high flow cat it's still illegal so I think you might as well just go catless.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
JDM vs USDM rear end	dcubed121	Inside and Out	17	07-27-2008 09:20 PM
Got JDM or (USDM>>JDM) with Mugen kit ? Post the pics !	xheartcore_boyx	Inside and Out	1	04-15-2008 05:09 PM
JDM vs EDM vs USDM	KingMarineM16a4	Garage	37	11-21-2007 08:10 AM
usdm si to jdm si	galaxygraysi	Bolt-Ons And All-Motor	11	07-08-2007 10:12 PM
Brakes- USDM vs JDM	cmf	Suspension and Brakes	16	06-15-2006 12:10 PM