370z Catalytic converters

felt · 10-13-2010, 11:34 PM

Just curious, how many cats does the stock 370z exhaust have? Also, with test pipes (stock headers), will you throw a cel?

cab83_750 · 10-14-2010, 12:44 AM

2 cats and 4 OXS

BOLIO 671 · 10-14-2010, 12:49 AM

Our Z's come with two Cats... With the test pipes it is dependent on the type of brand of TP's that you but you will have a higher chance of throwing a CEL with TP's Vs. HFC's...Most of the CEL's that amount from TP's or HFC's have been due to imporper installs...I know a few members that have had issues with CEL's and performed the non-fouler method of stuffing steel wool into the O2 bungs.

TongMan · 10-14-2010, 03:37 AM

I thought the headers each have a catalytic converter too.

ProfessorDave · 10-14-2010, 08:26 AM

Felt, I see you have a Mazdaspeed. Did you delete one or both cats on that? Just curious, I know it's a popular mod in the Mazda3 camp.

BOLIO 671 · 10-14-2010, 07:00 PM

Quote:

Originally Posted by TongMan

I thought the headers each have a catalytic converter too.

The Cat Converters are seperate from the Header...The Cats are the parts that go between the end of the header and the beginning of the Y or X Pipe

TongMan · 10-14-2010, 07:37 PM

Ok. So I guess there would not be much gain in replacing the headers as there are no cats.

corner3garage · 10-14-2010, 07:41 PM

2 cats

felt · 10-15-2010, 12:03 AM

Quote:

Originally Posted by ProfessorDave

Felt, I see you have a Mazdaspeed. Did you delete one or both cats on that? Just curious, I know it's a popular mod in the Mazda3 camp.

Yes sir, I have a 3" Turboback exhaust on the MS3, it's catless. Best modification I did on the case besides an intake.

Marcusz · 03-30-2012, 07:59 PM

Would high flow cats make it louder

SS_Firehawk · 03-30-2012, 10:17 PM

Indeed

Japanjay · 03-31-2012, 01:48 AM

Same topic but if I go with PPE race header I am sure I will through a code, which can be bypassed with a dummy O2 sensor, but will it pass the sniffer at the emmisions station? Something I have been wondering due to planning out parts.

SS_Firehawk · 04-01-2012, 10:55 PM

So long as it isn't throwing a code I don't think it should. But I haven't had to try.

Trips · 04-01-2012, 11:08 PM

Yup two Cats

10-13-2010, 11:34 PM	#1 (permalink)
felt Base Member Join Date: Oct 2010 Location: inland empire Posts: 29 Drives: mazdaspeed3 Rep Power: 14	370z Catalytic converters Just curious, how many cats does the stock 370z exhaust have? Also, with test pipes (stock headers), will you throw a cel?

10-14-2010, 12:49 AM	#3 (permalink)
BOLIO 671 A True Z Fanatic Join Date: Mar 2010 Location: GUAHAN Posts: 1,198 Drives: To & From then Back Rep Power: 3399	Our Z's come with two Cats... With the test pipes it is dependent on the type of brand of TP's that you but you will have a higher chance of throwing a CEL with TP's Vs. HFC's...Most of the CEL's that amount from TP's or HFC's have been due to imporper installs...I know a few members that have had issues with CEL's and performed the non-fouler method of stuffing steel wool into the O2 bungs. __________________ 2013 Nismo Z34 / FI TT #091 / IG: @lilzilla_z34

10-14-2010, 08:26 AM	#5 (permalink)
ProfessorDave A True Z Fanatic Join Date: Jul 2010 Location: Scranton, PA Posts: 1,580 Drives: In the fairway Rep Power: 18	Felt, I see you have a Mazdaspeed. Did you delete one or both cats on that? Just curious, I know it's a popular mod in the Mazda3 camp. __________________ Rain, snow, sleet, hail: 2009 Mazda 3 sGT HB Everything else: 2009 370z, PW Touring 6MT

10-14-2010, 07:41 PM	#8 (permalink)
corner3garage The370Z.com Sponsor Join Date: Oct 2009 Location: Laguna Hills, CA Posts: 9,879 Drives: 240sx, 350z, 370z Rep Power: 34	2 cats __________________ Corner3motorsports.com

03-30-2012, 10:17 PM	#11 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7334	Indeed __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

10-14-2010, 12:44 AM	#2 (permalink)
cab83_750 Track Member Join Date: Apr 2009 Location: CA Posts: 887 Drives: 09 NISSAN 370Z Rep Power: 417	2 cats and 4 OXS

10-14-2010, 03:37 AM	#4 (permalink)
TongMan A True Z Fanatic Join Date: Feb 2010 Location: NorCal Posts: 1,297 Drives: 2013 Nissan GTR Rep Power: 715	I thought the headers each have a catalytic converter too.

10-14-2010, 07:37 PM	#7 (permalink)
TongMan A True Z Fanatic Join Date: Feb 2010 Location: NorCal Posts: 1,297 Drives: 2013 Nissan GTR Rep Power: 715	Ok. So I guess there would not be much gain in replacing the headers as there are no cats.

03-30-2012, 07:59 PM	#10 (permalink)
Marcusz Enthusiast Member Join Date: Feb 2012 Location: Orangeville Ontario Posts: 388 Drives: 370z black on black Rep Power: 13	Would high flow cats make it louder

03-31-2012, 01:48 AM	#12 (permalink)
Japanjay Track Member Join Date: Mar 2012 Location: Puyallup Posts: 856 Drives: 09 Nissan 370z MB M6 Rep Power: 14	Same topic but if I go with PPE race header I am sure I will through a code, which can be bypassed with a dummy O2 sensor, but will it pass the sniffer at the emmisions station? Something I have been wondering due to planning out parts.

04-01-2012, 10:55 PM	#13 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7334	So long as it isn't throwing a code I don't think it should. But I haven't had to try. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

04-01-2012, 11:08 PM	#14 (permalink)
Trips Administrator Join Date: May 2009 Location: Disneyland, Ca Posts: 8,728 Drives: 🔰 Rep Power: 10	Yup two Cats __________________

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