question: Cats and Horses
Thread Starter
Instructor
Joined: Apr 2009
Posts: 205
Likes: 19
From: Denver Colorado
St. Jude Donor '09
question: Cats and Horses
I am having LG street series headers / x pipe / BB Bullets and a beefy CAM installed later this week onto my 08 Z51
my question is regarding CATS - I have some race cats, but being in Oklahoma I dont have to install them. How much horsepower / torque is lost by adding cats to the system?
I was told by Jim at swtuning that it will be LOUD without the cats.
any opinons would be welcome
my question is regarding CATS - I have some race cats, but being in Oklahoma I dont have to install them. How much horsepower / torque is lost by adding cats to the system?
I was told by Jim at swtuning that it will be LOUD without the cats.
any opinons would be welcome
Drifting
Joined: Apr 2009
Posts: 1,307
Likes: 26
From: Miami
I have the bullets and LG pros W/CATS on mine and let me tell you brother unless you've had headers and a loud exhaust before, you are going to be surprised! Loud like BAM!!! Cops come get me, theres a nascar loose on the street!
Im extreme and I love it but I find myself driving slower not to scare the hell out of everyone and get tickets.
So maybe you should try without cats first and THEN if you need more ... Go for it!!
Just my .02
Rod
Im extreme and I love it but I find myself driving slower not to scare the hell out of everyone and get tickets.
So maybe you should try without cats first and THEN if you need more ... Go for it!!
Just my .02
Rod
Last edited by SgtRod; May 31, 2009 at 10:56 PM.
Melting Slicks
Joined: May 2004
Posts: 3,017
Likes: 2
You will loose 3-5hp with quality high flow cats. Get the TB ported at the same time and make that up and then some..
Melting Slicks
Joined: Jul 2006
Posts: 2,136
Likes: 0
From: Stillwater MN
I have a cam, headers with offroad x-pipe (no cats) and B&B Bullets on my Z06. The car is definently loud but not crazy loud. The smell of running no cats on a cammed car is not as bad as I thought it would be, it does have a stronger gas odor but I only notice it if I'm standing directly behind the car.
Your car is going to sound mean, especially if you have no cats.
Here's a video of mine, yours should sound even louder.
http://www.youtube.com/watch?v=wkyER2sp3cQ
Your car is going to sound mean, especially if you have no cats.
Here's a video of mine, yours should sound even louder.http://www.youtube.com/watch?v=wkyER2sp3cQ
Thread Starter
Instructor
Joined: Apr 2009
Posts: 205
Likes: 19
From: Denver Colorado
St. Jude Donor '09
I have a cam, headers with offroad x-pipe (no cats) and B&B Bullets on my Z06. The car is definently loud but not crazy loud. The smell of running no cats on a cammed car is not as bad as I thought it would be, it does have a stronger gas odor but I only notice it if I'm standing directly behind the car.
Your car is going to sound mean, especially if you have no cats. Here's a video of mine, yours should sound even louder.
http://www.youtube.com/watch?v=wkyER2sp3cQ
Your car is going to sound mean, especially if you have no cats.
Here's a video of mine, yours should sound even louder.http://www.youtube.com/watch?v=wkyER2sp3cQ
thanks everyone for the opinons and help...I need to think about it
1 option is to leave the NPP on my car...but that seems like a waste of a good cam / headers / tune to me...
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Melting Slicks
Joined: Nov 2004
Posts: 2,408
Likes: 145
From: Northcentral, Pennsylvania
St. Jude Donor '09-'11
The NPP mufflers will probably surprise you after headers/cam. I have high flow cats with my headers/cam/Npp and the car is very loud. I get plenty of positive comments from people who like the sound of a beefed up exhaust system. However, sometimes it is nice to just have a quiet ride, and all I have to do is push a button to close the muffler flaps.
Thread Starter
Instructor
Joined: Apr 2009
Posts: 205
Likes: 19
From: Denver Colorado
St. Jude Donor '09
The NPP mufflers will probably surprise you after headers/cam. I have high flow cats with my headers/cam/Npp and the car is very loud. I get plenty of positive comments from people who like the sound of a beefed up exhaust system. However, sometimes it is nice to just have a quiet ride, and all I have to do is push a button to close the muffler flaps.
Melting Slicks
Joined: Nov 2004
Posts: 2,408
Likes: 145
From: Northcentral, Pennsylvania
St. Jude Donor '09-'11
I don't think there would be any difference. GM says 6 ponies for the NPP mufflers. If you don't want the NPP mufflers, you will easily sell them on this forum or eBay.