should i use high flow cats or replace my cats with resonators on my j30?
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infinitiboyj30
- Posts: 87
- Joined: Wed Feb 04, 2009 6:42 pm
- Car: 1993 infiniti j30
should i use high flow cats or replace my cats with resonators on my j30?
i have a 93 j30 and im gonna do a full exhaust system on it. i was thinkin to remove the cats and replace them with high flow cats or resonators what do u think is best? or should i just go catless since i dont have emissions in my state for my car? also i wanna replace the air box with a k&n cone filter what do you think?
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Infinitiguy19
- Posts: 7787
- Joined: Sat Dec 22, 2007 4:58 pm
- Car: 1993 Infiniti Q45 188580 Miles
1994 Infiniti Q45a 240000 Miles
Re: should i use high flow cats or replace my cats w ... (infinitiboyj30)
If you want loudness with no side effect but wasting money I would go with the exhaust.
If you want to ruin your intake tract then go with the K/N filter.
I would keep it stock because only a few J30 with an aftermarket exhaust sound good so search.
Welcome to NICO
If you want to ruin your intake tract then go with the K/N filter.
I would keep it stock because only a few J30 with an aftermarket exhaust sound good so search.
Welcome to NICO
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Q45tech
- Moderator
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- Joined: Tue Apr 30, 2002 3:19 am
- Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
Re: should i use high flow cats or replace my cats w ... (Paul Wall)
I would never publically admit to a Federal Felony violation of the Clean Air Act on the internet- emission tampering. Just because a state doesn't test NOW who knows in future. What if you get caught in another state or by an EPA spot inspection.If you ever sell an emission tampered vehicle you can be made to restore to compliance years after the sale because you committed a fraudulent sale.
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#1 Sailor Scout
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Infiniti J30 fan - Location: Mobile, AL
Re: should i use high flow cats or replace my cats w ... (infinitiboyj30)
What size were you going to make your exhaust? I say don't make it larger than 2.5"s. If you delete the stock cats, replace them with high-flow cats that are CARB/50 state legal. Basically, replace the 2 mid-section mufflers & delete the rear resonator that resembles a muffler.infinitiboyj30 wrote:i have a 93 j30 and im gonna do a full exhaust system on it. i was thinkin to remove the cats and replace them with high flow cats or resonators what do u think is best? or should i just go catless since i dont have emissions in my state for my car? also i wanna replace the air box with a k&n cone filter what do you think?
I think gr8scott can help you with this more than I could. He had a custom exhaust on his J before he sold it.
As far as the K&N filter goes, go with the drop in. The only way you should do a cone filter is if you plan on installing a custom CAI. Besides, HP/torque gains are minimal & you can barely hear the "hiss" of the intake.