FLOWMASTER OUTLAW VRS. SLP LOUDMOUTH - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

mgb · 12-08-2014, 07:00 AM

I have long tube headers, high flow cats, mild cam, with corsa exhaust. Want more aggressive sound. If I go muffler delete, will I loose any hp or trq. I'm trying to decide between Outlaws and Loudmouths. I can't see videos, looking for opinions.

Taco Time · 12-08-2014, 08:32 AM

I'm very pleased with my Outlaws. However since you're cammed I'd recommend American Thunders. I think mine is just a little too loud. I think I'd be better with high flow cats and swapping to the American thunder mufflers.

I haven't heard the SLP exhaust, so I can't help you there.

MightymouseSS · 12-08-2014, 09:50 AM

I have slp loudmouth 2 and they sound good. Nice deep tone but not annoying. Theres a lil bit of drone in 6th between 1800/2000 rpm. I've heard borla atak on cammed cars and its louder than my slp.

mgb · 12-08-2014, 10:36 AM

Quote:

Originally Posted by MightymouseSS

I have slp loudmouth 2 and they sound good. Nice deep tone but not annoying. Theres a lil bit of drone in 6th between 1800/2000 rpm. I've heard borla atak on cammed cars and its louder than my slp.

What is drone? Also, what about hp lose or gain. Tell me about the nightfury cam.

ChocoTaco369 · 12-08-2014, 10:38 AM

You will not lose any horsepower going with a muffler delete. Mufflers are so far past the crossover they can only cost you horsepower by running one with an inefficient design. There shouldn't be any power difference between an SLP Loutmouth, Flowmaster Outlaw or muffler delete because they are all straight-through designs. The only difference should be sound, and all may be unbearably loud for if not you, at least your neighbors on your setup.

Flowmaster American Thunders will cost you significant horsepower. They flow horribly - much worse than even the stock cans. It is probably one of the only catbacks on the market that will cost you significant horsepower.

Beckmann2420 · 12-08-2014, 10:41 AM

Quote:

Originally Posted by MightymouseSS

I have slp loudmouth 2 and they sound good. Nice deep tone but not annoying. Theres a lil bit of drone in 6th between 1800/2000 rpm. I've heard borla atak on cammed cars and its louder than my slp.

Ahhhhh I can't take it anymore! I can't wait to get this cam in! Hope the combo I have going sounds great with the cam. Especially with the ATAK.

Taco Time · 12-08-2014, 10:48 AM

Quote:

Originally Posted by ChocoTaco369

You will not lose any horsepower going with a muffler delete. Mufflers are so far past the crossover they can only cost you horsepower by running one with an inefficient design. There shouldn't be any power difference between an SLP Loutmouth, Flowmaster Outlaw or muffler delete because they are all straight-through designs. The only difference should be sound, and all may be unbearably loud for if not you, at least your neighbors on your setup.

Flowmaster American Thunders will cost you significant horsepower. They flow horribly - much worse than even the stock cans. It is probably one of the only catbacks on the market that will cost you significant horsepower.

What are you basing this on?

MightymouseSS · 12-14-2014, 09:45 AM

Night fury cam el paso: http://youtu.be/ts6RUwE-pFc

avido · 12-14-2014, 01:47 PM

Quote:

Originally Posted by ChocoTaco369

You will not lose any horsepower going with a muffler delete. Mufflers are so far past the crossover they can only cost you horsepower by running one with an inefficient design. There shouldn't be any power difference between an SLP Loutmouth, Flowmaster Outlaw or muffler delete because they are all straight-through designs. The only difference should be sound, and all may be unbearably loud for if not you, at least your neighbors on your setup.

Flowmaster American Thunders will cost you significant horsepower. They flow horribly - much worse than even the stock cans. It is probably one of the only catbacks on the market that will cost you significant horsepower.

what are you saying

..there is no difference in power with any kind of muffler...it's just sound/noise.

just remember if the exhaust has a incredible flow you got the power on the big rpm.if you have back pressure you see power in the low rpm..

i have done a lot of test with exhaust when i have had a golf gti. totally straight,76mm 70mm and mixed..

Quote:

Originally Posted by MightymouseSS

Night fury cam el paso: http://youtu.be/ts6RUwE-pFc

it sounds awesome...i like just a few cars cammed ,most of it sound too much metallic,but this is a lovely sound!...

ZuluKilla8 · 12-15-2014, 03:22 PM

Ls3 Lt headers high flow cats and boost cam through outlaws

https://vimeo.com/114600186

Sent from my iPhone using Tapatalk

avido · 12-15-2014, 04:22 PM

Quote:

Originally Posted by ZuluKilla8

Ls3 Lt headers high flow cats and boost cam through outlaws

https://vimeo.com/114600186

Sent from my iPhone using Tapatalk

my god,there is a devil inside

96MrBass · 12-15-2014, 05:18 PM

Quote:

Originally Posted by MightymouseSS

I have slp loudmouth 2 and they sound good. Nice deep tone but not annoying. Theres a lil bit of drone in 6th between 1800/2000 rpm. I've heard borla atak on cammed cars and its louder than my slp.

Couldn't have said it any better I'm more than happy with mine. SLP

ChocoTaco369 · 12-15-2014, 06:10 PM

Quote:

Originally Posted by Taco Time

What are you basing this on?

Years and years of dyno testing. Flowmaster 80 series and 40 series mufflers are horrific. On H/C/I cars, I've seen cutouts gain 40-50rwhp. Blowmaster, Slowmaster, Flowstopper...these nicknames were coined back in the earliest days of the LS1 for a damn good reason. Probably the only catback that will cost you horsepower is a Flowmaster American Thunder. You'll perform better stock.

The Outlaws, however, are excellent.

ChocoTaco369 · 12-15-2014, 06:13 PM

Quote:

Originally Posted by avido

what are you saying

..there is no difference in power with any kind of muffler...it's just sound/noise.

just remember if the exhaust has a incredible flow you got the power on the big rpm.if you have back pressure you see power in the low rpm..

i have done a lot of test with exhaust when i have had a golf gti. totally straight,76mm 70mm and mixed..

That is not true. There are restrictive mufflers out there. It just so happens that the stock catalytic converters on the 5th generation Camaro are so terribly inefficient, the muffler isn't the bottleneck. Swap to a longtube header with high flow catalytic converters and your mufflers will start to matter. They will become the bottleneck.

A Flowmaster multi-chambered muffler will likely be the poorest flowing of any mainstream catback, especially when compared to "straight through" designs. The giant stock cans outperform 40-series mufflers. If I were a betting man, I'd bet 40-series mufflers will cost you rwhp versus stock, even. They are known to be that horrifically restrictive. On a LT setup, they will be a serious bottleneck.

12-08-2014, 07:00 AM	#1
mgb Drives: 2010 ABM 2SS - 2012 ZL1 Join Date: Nov 2014 Location: NC Posts: 98 View My Garage	FLOWMASTER OUTLAW VRS. SLP LOUDMOUTH I have long tube headers, high flow cats, mild cam, with corsa exhaust. Want more aggressive sound. If I go muffler delete, will I loose any hp or trq. I'm trying to decide between Outlaws and Loudmouths. I can't see videos, looking for opinions.

12-08-2014, 08:32 AM	#2
Taco Time Drives: 2014 1SS Join Date: Jun 2014 Location: Angleton, TX Posts: 1,339 View My Garage	I'm very pleased with my Outlaws. However since you're cammed I'd recommend American Thunders. I think mine is just a little too loud. I think I'd be better with high flow cats and swapping to the American thunder mufflers. I haven't heard the SLP exhaust, so I can't help you there. __________________ Taco's 2014 SS Mods: 417 Stroker \| CAI \| Bo's PTB \| Kooks LTs \| Flowmaster Outlaw Catback \| Night Fury Cam \| Powerbond UDP \| Apex Catch Can \|PRC Ported Heads \|FAST 102 Intake \|Suspension Crap\| Built by J-Rod.

12-08-2014, 09:50 AM	#3
MightymouseSS Drives: 2011 LS3 Join Date: Jan 2012 Location: el paso tx Posts: 547	I have slp loudmouth 2 and they sound good. Nice deep tone but not annoying. Theres a lil bit of drone in 6th between 1800/2000 rpm. I've heard borla atak on cammed cars and its louder than my slp. __________________ Vararam Stainless Works Headers Vmax TB SLP loudmouth 2 Nightfury Cam Mike Norris CC Tuned by Southwest Speed

12-08-2014, 10:38 AM	#5
ChocoTaco369 145lb Powerlifter Drives: 2013 Camaro 2SS RS LS3 Join Date: Jan 2014 Location: Conshohocken, PA Posts: 1,146	You will not lose any horsepower going with a muffler delete. Mufflers are so far past the crossover they can only cost you horsepower by running one with an inefficient design. There shouldn't be any power difference between an SLP Loutmouth, Flowmaster Outlaw or muffler delete because they are all straight-through designs. The only difference should be sound, and all may be unbearably loud for if not you, at least your neighbors on your setup. Flowmaster American Thunders will cost you significant horsepower. They flow horribly - much worse than even the stock cans. It is probably one of the only catbacks on the market that will cost you significant horsepower. __________________

12-14-2014, 09:45 AM	#8
MightymouseSS Drives: 2011 LS3 Join Date: Jan 2012 Location: el paso tx Posts: 547	Night fury cam el paso: http://youtu.be/ts6RUwE-pFc __________________ Vararam Stainless Works Headers Vmax TB SLP loudmouth 2 Nightfury Cam Mike Norris CC Tuned by Southwest Speed

12-15-2014, 03:22 PM	#10
ZuluKilla8 Drives: 2010 Camaro 1SS/RS RJT Join Date: Jan 2010 Location: NJ Posts: 831	Ls3 Lt headers high flow cats and boost cam through outlaws https://vimeo.com/114600186 Sent from my iPhone using Tapatalk __________________ 2010 Camaro SS LS3 Holley Hi-Ram Manifold,Custom grind boost cam,Vortech V-3,10Rib 3.47 Pully Airfilter Pipe Delete, 10 PSI, TSP LT Headers, Flowmaster Outlaws, Alky Control Meth Kit, PFADT 1.25, ZL1 Fuel Pump, DSS 1000HP axles, Mantic ER2 Clutch, Full BMR rear suspension drag pack upgrade. C6 Vette 18 rims with M/T 305 out back. COPO Hood Race Proven Motorsports tuned