hi-flow cat passing smog? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

teampulse · 06-19-2007, 05:25 PM

I was wondering if those of you with hi-flow cats have passed smog in california with them? i need a new cat and was gonna grab a hi-flow cat for cheap but just wanted to see if they pass smog normally. thanks for any help

dan240 · 06-19-2007, 05:43 PM

Mine wouldn't but that doesn't mean yours won't. You do need to make sure that you purchase a 3-way cat for testing in California and most, if not all, of the high flow cats I have seen are 2-way (the catalyst).

Hopefully someone that has passed will let you know what they ran.

dopeassjackson · 06-19-2007, 07:45 PM

i got a cheap ($50) 3in in/out 4inch around cat off ebay. i replaced a test pipe with it and it made NO diferance at all. its also OBD2 compliant. the catalyst is only about 5 inches long.

06-19-2007, 05:25 PM	#1
teampulse Zilvia Member Join Date: Nov 2001 Location: san Diego, CA Age: 42 Posts: 213 Trader Rating: (0) Feedback Score: 0 reviews	hi-flow cat passing smog? I was wondering if those of you with hi-flow cats have passed smog in california with them? i need a new cat and was gonna grab a hi-flow cat for cheap but just wanted to see if they pass smog normally. thanks for any help __________________ - jared - Motorcycle Track days!

06-19-2007, 05:43 PM	#2
dan240 Leaky Injector Join Date: May 2002 Location: San Diego Posts: 139 Trader Rating: (0) Feedback Score: 0 reviews	Mine wouldn't but that doesn't mean yours won't. You do need to make sure that you purchase a 3-way cat for testing in California and most, if not all, of the high flow cats I have seen are 2-way (the catalyst). Hopefully someone that has passed will let you know what they ran.

06-19-2007, 07:45 PM	#3
dopeassjackson Zilvia Member Join Date: Oct 2005 Location: stone ridge NY Posts: 150 Trader Rating: (0) Feedback Score: 0 reviews	i got a cheap ($50) 3in in/out 4inch around cat off ebay. i replaced a test pipe with it and it made NO diferance at all. its also OBD2 compliant. the catalyst is only about 5 inches long.