Will a high flow cat reduce noise levels by much?

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Mike Wazowski

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Discussion starter · #1 · Dec 7, 2004

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I have a GReddy Ti exhaust and it's way too loud for my tastes. At first I thought it would be cool to have a loud exhaust but it drones too loud when cruising.

Will a high-flow cat such as a Catco decrease my sound levels by a good amount? Or is it not even worth bothering to reduce noise?

I've read that I will lose a few HP by running this rather than a straight pipe, but that is fine to me for the reduction in noise and saving the planet.

If I can't solve the problem with a high flow cat then I will probably get a GReddy Power Extreme 2 as it is JASMA certified.

Thanks,
Victor

 

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Mike Wazowski

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Discussion starter · #2 · Dec 7, 2004

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On a side note, I put on a resonated test pipe from Project Silvia and it didn't do anything to the noise level, so I wonder why they even both resonating it.

 

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James

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#3 · Dec 7, 2004

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My exhaust (Greddy TR EVO II) was MUCH quieter with the high flow cat converter but I also wasn't boosting as high. I had only driven less than 5000 miles with the 240SX last year so I took the cat off after the smog test. If I ever travel, I'll put the silencer on. I could see myself going crazy without it on a long trip.

 

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Mike Wazowski

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Discussion starter · #4 · Dec 7, 2004

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Yeah the silencer is an easy way to kill the noise but I don't want to run around with that thing stuck up my ***. Hehehe

 

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geist

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#5 · Dec 7, 2004

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i hate to say it but thats the way the exhaust is, i wear earplugs. you might try going to an rsr exhaust, those are real quiet and they look good too.

 

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Mike Wazowski

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Discussion starter · #6 · Dec 7, 2004

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Yeah I considered all those quiet exhaust, but I didn't like the look of the muffler. The GReddy PE2 is the only one that has the angled up design and is quiet.

 

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Maximus

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#7 · Dec 8, 2004

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a high flow cat will dampen the noise a bit but probably wont make it as quiet as you want I went from a test pipe to a catco highflow and once I lay into it it's almost just as loud as it was before but for jsut cruising aorund town it's tame enough for me

 

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Mastaflash

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#8 · Dec 8, 2004

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i had a straight pipe on my car, then when i had to get it e-checked i had to put a ca on it. when i put the cat on it the noise increased prety much. it sounded way worse IMO too. have you tried a straight pipe?