I have a Nismo Exhaust with RT cats, and its too loud for my taste, with a lot of droon. I want to replace them with a more mellow sounding High flow Cat. Anyone having any experience or advice on different cats? I was thinking of the Ultimate Racing ones.

 

I believe the UR and Kinetix are the same Carsound/Magnaflow brand. I think RT may be as well. Make sure so that you don't end up with the same units you now have.

Helix is coming out with some very nice looking units in January and according to Gruppe-S they are not that loud. You may want to make inquiries.

 

Ill check on it, thanks I don't believe RT is the same as the UR.

 

if you decide to sell your rt cats just let me know. hope it has carb #.

 

We use the magnaflow converters on our pipes, and they are not noticeably louder than factory

 

yep, I have the Ultimate's on my car and have had the same exact reply from every customer who went from RT to UR.....they all said the car sounded exactly like they hoped!

Adam

 

Dude, quiet and HF/cats are not compatible. I have Kinetix hf cats, headers and Borla exhaust and they sound great but not too loud.
No rasp.
Rasp is something that you don't want.

 

Thanks for the responses guys. Now searching for any fitment, or failure issues on Kinetix, and UR.

 

Can't hear any difference from stock with the Crawford cats.

 

stock....the crawfords are louder

 

I love my Crawfords!

 

Loved my Crawfords.

My kinetix were louder then my Crawfords from what I remember.

Someone said they dont notice much of a diff from stock to the Crawfords.. Well with my experiance, they were WAY louder then stock.

 

ok, lets cut to the bottom line. Some people are saying Crawfords and others UR. What is the cost of each of these and what is the hp gain? Anyone know and dare to post or pm????

 

I've been debating whether to get the Crawfords as well... wondering if they're worth it performance-wise... plus I haven't found a video clip of them with the Nismo exhaust... curious about how it sounds.

 

Or just have a muffler shop weld in some resonators on your Y pipe.

 

I've never dynoed just cats, but maybe one of our customers did a before/after. Price for the Ultimate's are $439 + shipping from us

 

Crawfords go for $500 plus shipping.

 

Kinetix are $369.99 plus shipping.

 

I think that the quality and fit of the Ulitmate Racing Cats, looks to be the best for the price. I also heard from a few that the sound is just right. Thanks for all the opinions. I will be contacting Adam at Z1 for these shortly.