Smog question cali - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

bouncin_180 · 04-26-2009, 03:09 PM

hey got a 96 zenki wondering does anyone know how closely smog techs look at our cat when doing smog ... i mean can we get away with replacing at least the front cat with a aftermarket non obd2 compliant cat ... i would think they can see what they need on the back on but just wondering ... this is getting stupid with +$500 for cats oem replacements

Om1kron · 04-26-2009, 08:27 PM

Quote:

Originally Posted by bouncin_180

hey got a 96 zenki wondering does anyone know how closely smog techs look at our cat when doing smog ... i mean can we get away with replacing at least the front cat with a aftermarket non obd2 compliant cat ... i would think they can see what they need on the back on but just wondering ... this is getting stupid with +$500 for cats oem replacements

you can get an aftermarket cat welded in as far as I know.

smirfs2k05 · 04-27-2009, 01:39 AM

Its not about the tech its the reading. OBD cats reduce NOx, older cats don't.

bouncin_180 · 04-28-2009, 02:03 AM

but im saying in california where i live they jack up the car and look at the cat to see if its cali legal and/or stock ...

yes i know what a cat would do but what i was asking is if the front cat on our cars ... if anyone know how well a tech takes a look at it ... http://www.car-sound.com/04basics/gifs/stamp_lg.jpg ... just asking thanks

*Jonnie Fraz* · 04-28-2009, 08:14 AM

It is going to depend on your tech. Some guys are real anal, and some guys are real easy. Just make sure you go to no pass no pay tech.

04-26-2009, 03:09 PM	#1
bouncin_180 Zilvia Junkie Join Date: Oct 2003 Location: San Diego Posts: 356 Trader Rating: (1) Feedback Score: 1 reviews	Smog question cali hey got a 96 zenki wondering does anyone know how closely smog techs look at our cat when doing smog ... i mean can we get away with replacing at least the front cat with a aftermarket non obd2 compliant cat ... i would think they can see what they need on the back on but just wondering ... this is getting stupid with +$500 for cats oem replacements

04-28-2009, 08:14 AM	#5
Jonnie Fraz Premium Member Join Date: Jan 2005 Location: Cali Age: 56 Posts: 1,371 Trader Rating: (29) Rides Gallery: Jonnie Fraz Feedback Score: 29 reviews	It is going to depend on your tech. Some guys are real anal, and some guys are real easy. Just make sure you go to no pass no pay tech. __________________ Stealth-Custom-Fab.com

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04-27-2009, 01:39 AM	#3
smirfs2k05 Join Date: Dec 2008 Location: Apple Valley Age: 37 Posts: 18 Trader Rating: (0) Feedback Score: 0 reviews	Its not about the tech its the reading. OBD cats reduce NOx, older cats don't.

04-28-2009, 02:03 AM	#4
bouncin_180 Zilvia Junkie Join Date: Oct 2003 Location: San Diego Posts: 356 Trader Rating: (1) Feedback Score: 1 reviews	but im saying in california where i live they jack up the car and look at the cat to see if its cali legal and/or stock ... yes i know what a cat would do but what i was asking is if the front cat on our cars ... if anyone know how well a tech takes a look at it ... http://www.car-sound.com/04basics/gifs/stamp_lg.jpg ... just asking thanks