Question about AIR and Cats
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TECH Resident
Joined: Jan 2004
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From: Charleston SC
Question about AIR and Cats Here's the situation:
Installed GMMG, Interior noise level higher than expected with MACS and Ypipe w/ cats, but acceptable.
QTP LT's and ORY on the way. I've been advised the the ORY will make interior noise nearly unbearable.
Switching to QTP y pipe w/ Carsound Cats to keep noise level inside bearable.
The LT's I ordered have no AIR provisions.
Will I mess up the cats in the Y pipe by not having AIR?? I live in SC and NO EMISSIONS.
Can I get away with the "race style" LT's and no AIR and not harm my ypipe and cats??
Thanks
Installed GMMG, Interior noise level higher than expected with MACS and Ypipe w/ cats, but acceptable.
QTP LT's and ORY on the way. I've been advised the the ORY will make interior noise nearly unbearable.
Switching to QTP y pipe w/ Carsound Cats to keep noise level inside bearable.
The LT's I ordered have no AIR provisions.
Will I mess up the cats in the Y pipe by not having AIR?? I live in SC and NO EMISSIONS.
Can I get away with the "race style" LT's and no AIR and not harm my ypipe and cats??
Thanks
Launching!
Joined: Aug 2002
Posts: 253
Likes: 1
From: Decatur, IL
This is something I struggled with when purchasing my headers. The AIR should help the life of the cats by heating them up quicker. However, I think the difference would be small at best, especially considering the LS1 heats up quickly. I doubt it would make more than a 10% difference in the life of the cats. In the end, I got the AIR provisions just for peace of mind.
You shouldn't have any problems, but I was wondering why you are getting cats for the interior noise. Something like bullet mufflers may help too, and they cost 1/4 as much as Carsound cats.
Thread Starter
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Joined: Jan 2004
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From: Charleston SC
Originally Posted by Ferocity02
You shouldn't have any problems, but I was wondering why you are getting cats for the interior noise. Something like bullet mufflers may help too, and they cost 1/4 as much as Carsound cats.
This car is my daily driver so I have to live with it and don't have the $$ to keep changing exhaust systems. People here tell me that the cats will help keep the interior noise level down. I'm also gonna put my rear seats back and see if that helps.
Currently the Car has MAC Mids with the MAC ypipe and cats and the noise level is acceptable, but like I said in another post they were saying that the LT's and ORY would be too loud
Where would the bullet mufflers go??? I went with the GMMG and QTP cause I wanted an all stainless exhaust and don't really want to chop up the y pipe or I pipe
Well...sound level is all opinion. I have MAC's also, with 3" duals dumped before the axle. I think the noise level inside is very acceptable, could even be a little louder... It's all opinion, but it sounds like you don't like noise since you GMMG set-up is significantly quieter then my set-up. If someone is sitting in the passenger seat, I can't hear them talking above 2000 RPM... I don't think bullets will offer the sound deadening you are looking for, but just threw it out there since they flow better and are cheaper than cats. They would go in under the driver and passenger floorboards. And yes, putting in the rear seats will help alot, when I took mine out I noticied a huge increase in interior noise.
Thread Starter
TECH Resident
Joined: Jan 2004
Posts: 882
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From: Charleston SC
Originally Posted by Ferocity02
Well...sound level is all opinion. I have MAC's also, with 3" duals dumped before the axle. I think the noise level inside is very acceptable, could even be a little louder... It's all opinion, but it sounds like you don't like noise since you GMMG set-up is significantly quieter then my set-up. If someone is sitting in the passenger seat, I can't hear them talking above 2000 RPM... I don't think bullets will offer the sound deadening you are looking for, but just threw it out there since they flow better and are cheaper than cats. They would go in under the driver and passenger floorboards. And yes, putting in the rear seats will help alot, when I took mine out I noticied a huge increase in interior noise.
Maybe I'm just getting older but I like it to be loud when I step on the gas but not for regular driving, Of course on my old LT1 Z i had the flowmaster 80 series muffler installed and it was loud as hell inside !!!! Guess i'm just a little gun shy LOL
