Can a high flow cat pass emissions? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sin0186 · 10-29-2014, 10:53 AM

I'm trying to get my S13 SR on the road and need to pass emission. I'm currently in the process of acquiring a 3" inlet HF cat and a muffler. Can I pass Oregon emissions with a HF cat? I also read that sniffer tests are no longer in effect? Should I get a regular cat and a HF cat for after emissions?

Maxima92se · 10-29-2014, 11:19 AM

Why don't you try to use the high flow cat and if you don't pass change it to the regular. I passed with mine in MA but on a supercharged maxima.

sin0186 · 10-29-2014, 11:30 AM

I need to purchase a HF cat and my cat for the KA was stolen along with the muffler. And at this moment the funds are running a bit low.

K_style · 11-03-2014, 10:47 PM

I used to work at DEQ, pm me for any question.

sin0186 · 11-12-2014, 10:03 AM

Hey K_Style, I appreciate your willingness to help. I passed the DEQ and my baby was back on the road for a week.....Until my ECU fried...Now back to square one.

CPT · 01-23-2015, 11:29 AM

I know its not the same but I passed in AZ with a test pipe lol

spooled240 · 01-23-2015, 12:08 PM

Depends where you are and what kind of high-flow cat you get. If it's just an older s13 where you just have to pass a sniffer in a state other than CA, there's a good chance you'll pass with a HF cat.

10-29-2014, 10:53 AM	#1
sin0186 Join Date: Nov 2008 Location: Portland OR Posts: 15 Trader Rating: (0) Feedback Score: 0 reviews	Can a high flow cat pass emissions? I'm trying to get my S13 SR on the road and need to pass emission. I'm currently in the process of acquiring a 3" inlet HF cat and a muffler. Can I pass Oregon emissions with a HF cat? I also read that sniffer tests are no longer in effect? Should I get a regular cat and a HF cat for after emissions?

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10-29-2014, 11:19 AM	#2
Maxima92se Join Date: Oct 2014 Location: Niagara Falls Posts: 4 Trader Rating: (0) Feedback Score: 0 reviews	Why don't you try to use the high flow cat and if you don't pass change it to the regular. I passed with mine in MA but on a supercharged maxima.

10-29-2014, 11:30 AM	#3
sin0186 Join Date: Nov 2008 Location: Portland OR Posts: 15 Trader Rating: (0) Feedback Score: 0 reviews	I need to purchase a HF cat and my cat for the KA was stolen along with the muffler. And at this moment the funds are running a bit low.

11-03-2014, 10:47 PM	#4
K_style Post Whore! Join Date: Dec 2007 Location: Henderson, NV Posts: 7,666 Trader Rating: (63) Rides Gallery: K_style Feedback Score: 63 reviews	I used to work at DEQ, pm me for any question.

11-12-2014, 10:03 AM	#5
sin0186 Join Date: Nov 2008 Location: Portland OR Posts: 15 Trader Rating: (0) Feedback Score: 0 reviews	Hey K_Style, I appreciate your willingness to help. I passed the DEQ and my baby was back on the road for a week.....Until my ECU fried...Now back to square one.

01-23-2015, 11:29 AM	#6
CPT Join Date: Jan 2015 Location: Montana Age: 29 Posts: 10 Trader Rating: (0) Feedback Score: 0 reviews	I know its not the same but I passed in AZ with a test pipe lol

01-23-2015, 12:08 PM	#7
spooled240 Post Whore! Join Date: Mar 2008 Location: San Diego, CA Posts: 4,143 Trader Rating: (27) Feedback Score: 27 reviews	Depends where you are and what kind of high-flow cat you get. If it's just an older s13 where you just have to pass a sniffer in a state other than CA, there's a good chance you'll pass with a HF cat.