View Poll Results: Should i take them off?
Yes
![](https://ls1tech.com/forums/images/polls/bar2-l.gif)
![](https://ls1tech.com/forums/images/polls/bar2.gif)
![](https://ls1tech.com/forums/images/polls/bar2-r.gif)
![](https://ls1tech.com/forums/clear.gif)
107
62.57%
No
![](https://ls1tech.com/forums/images/polls/bar3-l.gif)
![](https://ls1tech.com/forums/images/polls/bar3.gif)
![](https://ls1tech.com/forums/images/polls/bar3-r.gif)
![](https://ls1tech.com/forums/clear.gif)
64
37.43%
Voters: 171. You may not vote on this poll
Poll: should i take my cats off?
#41
TECH Resident
iTrader: (12)
Join Date: Dec 2005
Location: woodstock GA
Posts: 897
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
All i here is a bunch of tree huggin hippies, what do you think hospitals do with theyre waste from the O.R. it goes to places nobody ever realizes but you know why its not a big deal??? BECAUSE WE DONT THINK ABOUT IT!
So take your KNOTT damn tree hugger convention and go post up in a MUSTANG forum cause i dont wanna hear it, i just wanna know what its like to run no cats cause im about to toss mine!
![Bang Head](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_banghead.gif)
![Devil](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_devil.gif)
![Devil](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_devil.gif)
![Devil](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_devil.gif)
#43
Banned
iTrader: (115)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Originally Posted by CNVRTmyZ
All i here is a bunch of tree huggin hippies, what do you think hospitals do with theyre waste from the O.R. it goes to places nobody ever realizes but you know why its not a big deal??? BECAUSE WE DONT THINK ABOUT IT!
So take your KNOTT damn tree hugger convention and go post up in a MUSTANG forum cause i dont wanna hear it, i just wanna know what its like to run no cats cause im about to toss mine!
![Devil](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_devil.gif)
![Bang Head](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_banghead.gif)
![Devil](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_devil.gif)
![Devil](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_devil.gif)
![Devil](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_devil.gif)
![Rolleyes](https://ls1tech.com/forums/images/smilies/LS1Tech/rolleyes.gif)
#44
LS1Tech Administrator
iTrader: (3)
Join Date: Nov 2001
Location: Schiller Park, IL Member: #317
Posts: 32,338
Likes: 0
Received 1,774 Likes
on
1,264 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech20year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I'd say to keep the cats for a stock/bolt-on motor. But if you're planning big mods and looking for a max effort race car, ditch 'em..... it'll save weight, make exhaust routing easier, and free up some power. Not to mention, once you get into really big cams, usually a cat won't last very long.
IMO, if you're talking about a race car that sees nothing but the track and maybe a few hundred street miles a year (to and from events), you won't be doing any real harm.
I used to be 100% anti-cat. But I got sick of the smell on street gas. If you're running 100 octane or better though, then it smells great.
IMO, if you're talking about a race car that sees nothing but the track and maybe a few hundred street miles a year (to and from events), you won't be doing any real harm.
I used to be 100% anti-cat. But I got sick of the smell on street gas. If you're running 100 octane or better though, then it smells great.
![Grin](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_grin.gif)
Last edited by RPM WS6; 01-12-2006 at 04:56 PM.
#46
TECH Fanatic
iTrader: (30)
Join Date: Aug 2005
Location: Northern VA
Posts: 1,504
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
transamsixspeed you are killing sooo many people...you murderer!!! nah im just joking. theres no need for everybody to get mad at each other here. some have a difference in opinion. me personally, i dont run cats. i dont want to hear how wrong i am but im also not gonna give anyone **** for being pro-cats.
#48
LS1Tech Administrator
iTrader: (3)
Join Date: Nov 2001
Location: Schiller Park, IL Member: #317
Posts: 32,338
Likes: 0
Received 1,774 Likes
on
1,264 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech20year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Originally Posted by Louie83
I think LS1's sound better with cats.
But when it comes to true duals, I think it sounds better without them.
#50
10 Second Club
iTrader: (18)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
No cats here either. Here's how I look at it. Get all the POS cars and trucks off the road that burn as much oil as they do fuel. I see those things going down the highway with a cloud of blue smoke behind em, and I think to myself "now that's what screws the environment...not a good running LS1 car without cats." That's my opinion on it.
#51
8 Second Club
iTrader: (9)
Join Date: Oct 2005
Location: Ellicott City,MD
Posts: 1,085
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
x2, I do recycle thought so that kinda makes up for it
. I watched an episode of Sports Car Revlution on speed and the did a dyno test of a car with cats vs no cat and I think it was a 5hp difference. They also said that most racers claim that their cars run cleaner with out cats becasue they rev the cars up high and cats really work best at low rpms. Dont hold me to this info its just what I remember from the episode.
![Grin](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_grin.gif)
#52
On The Tree
iTrader: (1)
Join Date: Dec 2005
Location: Diamond Bar, Ca
Posts: 127
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Hey Guys,
I'm running on stock cats right now and since I live in CA i will fail emissions for sure if I go catless. However, I love the sound of CATLESS cars so I was wondering if High-Flow cats will improve the sound of my LS1? BTW I already have a magnaflow catback.
I'm running on stock cats right now and since I live in CA i will fail emissions for sure if I go catless. However, I love the sound of CATLESS cars so I was wondering if High-Flow cats will improve the sound of my LS1? BTW I already have a magnaflow catback.
![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
#54
12 Second Club
Join Date: Jun 2005
Location: Kansas City, MO
Posts: 1,275
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
A break in the comotion - I think LS1's sound better with cats.
![Nod](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_nod.gif)
#55
TECH Addict
iTrader: (3)
Join Date: Nov 2005
Location: Lincoln, NE
Posts: 2,869
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Originally Posted by BLACKNREDSS
I totally agree with you, sounds much cleaner IMO. Just sucks that your cant lower your car, well i cant anyway, they hang so low. If you daily drive the car i say cats, if its your weekend warrior or strip car i say ORY. ![Nod](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_nod.gif)
![Nod](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_nod.gif)
Catless Y = Rasp
Catted Y = Smoother
Duals = Don't need them because they sound good to begin with...I have the TSP X system with Bullets off my Pacesetter and there is no rasp at all, just deep and smooth.
As for pollution, sure I don't like doing it and I don't like the smell either. But it's just too damn expensive to put them on.
#57
11 Second Club
iTrader: (5)
Join Date: Jul 2005
Location: Crestview, FL
Posts: 510
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
yeah, i respect the opinons all of you have, but i run a cat-less car for over a year now. i really can't stand the smell being dumped out of my headers/ORY w/ a dynomax bullet welded on it, but i did build the formula as an aspiring race car... sorry mother earth...
#59
TECH Addict
iTrader: (8)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
no cats on all my vehicles. When i buy a car thats the first to go.
If people are concerned about poluting. Smokers polute. Factorys, Airplanes, trains, ships. I was watching TV and this one huge ship burned 1 gallon of fuel per so many INCHES in moved. INCHES!! What about the military always testing bombs? are they emission friendly? If cats have been on most cars since what '74? and the environment is still going to hell. I think the problem lies elsewhere. And even if, the percentage of people that take them off is so small that it hardly would matter. That one ship going across the ocean probably put off more polutants than everyone in the US driving catless could in a year.
If people are concerned about poluting. Smokers polute. Factorys, Airplanes, trains, ships. I was watching TV and this one huge ship burned 1 gallon of fuel per so many INCHES in moved. INCHES!! What about the military always testing bombs? are they emission friendly? If cats have been on most cars since what '74? and the environment is still going to hell. I think the problem lies elsewhere. And even if, the percentage of people that take them off is so small that it hardly would matter. That one ship going across the ocean probably put off more polutants than everyone in the US driving catless could in a year.
#60
Pontiacerator
iTrader: (12)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
When I feel like polluting the environment, I hop into one of my 69 GTO's. That fills the need, so I don't have to do it every day. Part of what's involved in driving a modern car is being responsible about emissions. Plus the consensus is that the sound is better with cats on most exhausts. When I get headers, I'll run cats. For the few hp they cost, the benefits outweigh the liabilities.