Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

A New Catback, Need Suggestions

Thread Tools
 
Search this Thread
 
Old Nov 12, 2008 | 06:34 PM
  #1  
Unleash's Avatar
Thread Starter
Staging Lane
 
Joined: Jan 2008
Posts: 52
Likes: 0
From: St. Louis, MO
Default A New Catback, Need Suggestions

Hey guys, I currently am running LT headers with an ORY without cats. I was thinking of getting the SLP LM II but wasn't too sure how loud and raspy it would be wihtout cats.

I know I can only get so much input without hearing it first hand but does anyone have any suggestions on a catback? I have the original catback that came on this hawk. No idea what it is I'm guessing a custom SLP one. But it is SOO quiet. I can bearly hear the car at idle and at WOT it sounds ok I've heard. But in the car it's still really quiet.

My past car was a 94z without cats and had long tubes with a cutout. That thing was loud but sounded great. I want to make some noise but not kill anyone you know?
Reply
Old Nov 12, 2008 | 06:45 PM
  #2  
redbadss's Avatar
TECH Enthusiast
iTrader: (4)
 
Joined: Jul 2008
Posts: 540
Likes: 0
From: Oklahoma
Default

lm1 would be really raspy.. i'm don't think lm2 would be raspy. i have lm2 with stock manifolds and stock y-pipe and there isn't any rasp at all. lm2 will be a lot louder than your stock catback, but won't be obnoxiously loud like some set-ups..
Reply
Old Nov 12, 2008 | 06:47 PM
  #3  
blownws6_nc's Avatar
Launching!
iTrader: (10)
 
Joined: Jun 2007
Posts: 279
Likes: 1
From: NC.
Default

I'm in the same boat as you. I'm thinking of a corsa r the new slp powerflo catback. as for as the lm. I've only heard them with cats, and they was not that bad.
Reply
Old Nov 12, 2008 | 08:25 PM
  #4  
Shockwave179's Avatar
TECH Fanatic
iTrader: (7)
 
Joined: Oct 2005
Posts: 1,416
Likes: 0
From: Western NY
Default

Stainless Gibson is $467

http://www.lmperformance.com/16645/1.html

Comes with 4 inch tips, which some may not like but I think it's one of the easier catbacks to have corsa clones put on as another option. Also louder than stock slp dual dual but not quite as loud as a loudmouth.




Reply
Old Nov 12, 2008 | 08:27 PM
  #5  
LS1-NAVY's Avatar
TECH Fanatic
15 Year Member
iTrader: (1)
 
Joined: Oct 2007
Posts: 1,007
Likes: 0
From: Denver, Colorado
Default

i say borlamouth
Reply
Old Nov 12, 2008 | 10:25 PM
  #6  
IZRED's Avatar
TECH Apprentice
 
Joined: Sep 2007
Posts: 364
Likes: 0
From: Bossier City, LA
Default

I got a SLP dual-dual catback. I just swapped the muffler out and put a Magnaflow in it's place, now it sounds louder, but not obnoxious, kinda' strange because Magnaflow is supposedly one of the quietest mufflers out there. Also, I got stock manifolds and stock Y-pipe, but that's going to change pretty soon.
Reply
Old Nov 13, 2008 | 12:35 PM
  #7  
Unleash's Avatar
Thread Starter
Staging Lane
 
Joined: Jan 2008
Posts: 52
Likes: 0
From: St. Louis, MO
Default

Hmm, I was also thinking of Magnaflow. Found a sponser with some on sale. But I was told it isn't much louder than my stock exhaust. I will keep looking and thanks for the input.

I've never heard of gibson. How is it? 4 Inch seems pretty big but it's all relative.

I may end up getting LM II, that's what I've wanted. I know GMMG is awesome but they are pricey. Then again you get what you pay for.
Reply
Old Nov 13, 2008 | 07:03 PM
  #8  
zracer323's Avatar
12 Second Club
iTrader: (12)
 
Joined: Oct 2007
Posts: 1,340
Likes: 1
From: Dayton, Ohio
Default

Magnaflow sounds great in my opinion. When I was running stock manifolds and cats it was way too mild for me but after headers, it just roars!
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Nov 13, 2008 | 09:36 PM
  #9  
Unleash's Avatar
Thread Starter
Staging Lane
 
Joined: Jan 2008
Posts: 52
Likes: 0
From: St. Louis, MO
Default

Originally Posted by zracer323
Magnaflow sounds great in my opinion. When I was running stock manifolds and cats it was way too mild for me but after headers, it just roars!
Really? That's good to hear. Could you get a clip for me? I'm really almost considering just buying SLP cause I know it's loud. I just don't want another quiet one.
Reply
Old Nov 13, 2008 | 10:21 PM
  #10  
mean_greenZ's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Oct 2007
Posts: 1,142
Likes: 1
Default

i say put a dynomax bullet p/n : 24219 on the end of the y and dump it at the axle! of course im bias though (check sig.)

but of the options you said my vote is LM2. i like loud and aggressive sound too so i know where your coming from.
Reply
Old Nov 13, 2008 | 10:22 PM
  #11  
Mint02CETA's Avatar
Teching In
 
Joined: Oct 2008
Posts: 40
Likes: 0
From: Kingsville, TX
Default

The LM1 would be almost "impossible to bear with" loud if you go with an ory and headers. LM1 only is the best sounding cat-back only in my opinion. but ya, if ur gonna add hearders/ORY you need to go with 1.Magnaflow 2. GMMG 3. B&B Triflo . IMO
Reply
Old Nov 13, 2008 | 10:25 PM
  #12  
LT1 > LS1's Avatar
On The Tree
 
Joined: Oct 2008
Posts: 110
Likes: 0
From: Aurora, IL
Default

magnaflow catback, ORY, Long tube headers

on a LT1


Reply
Old Nov 13, 2008 | 10:33 PM
  #13  
mean_greenZ's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Oct 2007
Posts: 1,142
Likes: 1
Default

^^^ sounds good man!
Reply
Old Nov 13, 2008 | 10:38 PM
  #14  
Detoxx03's Avatar
10 Second Club
iTrader: (14)
 
Joined: Jan 2007
Posts: 7,336
Likes: 74
From: Woodward Avenue
Default

I'm running the borlamouth because the lm2 was super raspy and I might even change it out.
Reply
Old Nov 14, 2008 | 04:49 PM
  #15  
Darksol's Avatar
TECH Enthusiast
 
Joined: Jan 2005
Posts: 697
Likes: 0
From: On a car lot, shopping...
Default

That vid is of a LT1 not Ls1. Lt's sound very different from ls's.
Reply
Old Nov 14, 2008 | 06:43 PM
  #16  
Unleash's Avatar
Thread Starter
Staging Lane
 
Joined: Jan 2008
Posts: 52
Likes: 0
From: St. Louis, MO
Default

Well guys, I've decided on SLP LM II. I will let you know how it sounds and I will put up a vid once I'm done. Only reason I decided on this is because my friend said if I didn't like it or thought it was too loud, etc. he would buy it off me. So I have nothing to lose really besides time installing it.

I will post it up midweek next week.
Reply
Old Nov 15, 2008 | 09:41 AM
  #17  
Fabian's Avatar
TECH Enthusiast
15 Year Member
Liked
iTrader: (5)
 
Joined: Aug 2006
Posts: 731
Likes: 10
From: Albuquerque, NM
Default

Dude, I have a cutout and I modified a smaller opening plate for it and the rest passes thru my Slowmaster catback. I love it, it took a few times desiging a little plate for the tone I want, but it is now adjustable like a Borla system.
Reply
Old Nov 15, 2008 | 11:16 AM
  #18  
wannafbody's Avatar
TECH Senior Member
20 Year Member
Community Builder
Liked
Loved
iTrader: (3)
 
Joined: Apr 2006
Posts: 5,603
Likes: 1,149
From: Pittsburgh
Default

The Gibson is the best bang for the buck. Sounds good without being obnoxious.
Reply
Old Nov 15, 2008 | 11:21 AM
  #19  
blownws6_nc's Avatar
Launching!
iTrader: (10)
 
Joined: Jun 2007
Posts: 279
Likes: 1
From: NC.
Default

I ordered a slp powerflo, so I'll keep you guys posted on how I like it next week when I put it on. I'll try to get some video of it for you other guys also. should sound good with the kooks & ory.
Reply
Old Nov 19, 2008 | 12:37 PM
  #20  
Unleash's Avatar
Thread Starter
Staging Lane
 
Joined: Jan 2008
Posts: 52
Likes: 0
From: St. Louis, MO
Default

Just wanted to to say that I got my package a day early. Thanks to SpeedInc. They provided great help through phone and email.

So anyways, the install took longer than I expected. I ended up cutting my exhaust pipe to take everything out then welded it back together for storage. Not sure why, but just figured if it's all in one part can't lose anything.

I had to start it up with no catback, damn was it loud. Especially in my garage. But I have to say the Loud Mouth II is quieter than I was expecting. I thought it was gonna be like cutout loud. But no, it's idle is almost perfect for me. It's fairly deep and mellow. Sounds great going through gears and at WOT it screeeeeams. No drone on the highway, but I do have a 6-speed so I'm sure that helps alot.

I have to say I like it alot. Just my opinion though. I will get a clip for you guys hopefully soon.
Reply



All times are GMT -5. The time now is 11:11 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE