does anyone think their would be much diff between just a flowmaster muffler with all stock tubeing, or the catback SLP ? for the money.

 

I had a Flowmaster 80 series welded on for about $90, it was alright definetly louder than stock, one of the sponsors had a GP recently where I'll be getting LM for under $300 shipped.let you know right, now I'm ', running no muffler cut it off at the muffler inlet about two weeks ago sounds like a dump truck IMHO.

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99 Z-28 Convertible,M-6
Loaded xcept CD Changer
B&M Ripper Shifter
Free mods,BMR STB,SFC's
SLP lid,LM on the way

 

Our exhausts are clogged by the cats and most of all the factory muffler. Get that off there and you'll gain power.
I'd put money down that no matter what cat-back you use on a car the hp gain would be within the margin of error of any dyno. Same goes for just changing the muffler.
A cut-out might be worth a tiny bit, but most folks think they sound like a$$.
When you buy a muffler or cat-back, buy for the sound you like and/or the tips you want.
Check my sig, I have a video clip of a car that has the same system my car has. The Dynomouth. You might like it.
Dave

PS: It cost me $140 installed!

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• Dynomouth Exhaust!
• My 1998 M6
• Mesh Grille
• 71-74 Emblems
• Clear Corners
• My New Home Page
• mn55927@citlink.net

[This message has been edited by ratio411 (edited July 15, 2002).]

 

loudmouth


i got it for like280 put it on myself with a friend in like 2 hours

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Ran 13.398 with shi*ty stock bald tires havn't run with the nittos yet.
AOL SN: stik6shift98
1998 Camaro Z-28

 

You talking performance or sound??

As far as sound the LM will be louder.

As far as performance the LM will give you more, as matter of fact the FlowMaster will deliver no significant gains over a stock exhaust.

Good Luck


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'01 Mystic Teal Z28
A4/3.23/Leather/T-Tops
Mods List Here

12.38/110.72/1.74 60'
325 rwhp/341 rwtq
www.MysticZ28.com

NorCal LS1/LT1

"To play it safe is not to play"

 

No, I can't believe you said that. anything is better than that choked off POS stock muffler. The fact is that 90% of the gains from cat-back mods are from dumping that muffler. Not from adding .25" to the I pipe. The gains to be had with a Flowmaster would be significant over a stock muffler, and if it were cat-back to cat-back with another brand, the difference in power would be within the margin of error for any dyno.
Dave

------------------

• Dynomouth Exhaust!
• My 1998 M6
• Mesh Grille
• 71-74 Emblems
• Clear Corners
• My New Home Page
• mn55927@citlink.net

 

LT headers, ORY pipe, NO cats, ANYTHING but the stock muffler, thats all you need to know

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//BLACK 99 SS//M-6//T-Top//TR 224/224 .561/.561 112LSA//CNC Stage 2 Heads 2.08"Intake-1.60" Exhaust Valves//Volant Cold Air Induction//BBK 80mm Throttle Body//SLP Stage 1 Suspension Kit// Powerslut Rotors//Hawk Pads//Mosser 12 bolt-4.10 Gears//SPEC Stage 3 Clutch//ASP Underdrive Pulley//Lingenfelter Aluminum Driveshaft//BMR Sway Bars-Lower Controll Arms-Panhard Rod-Track Pak-Strut Tower Brace//Taylor Wires-NGK plugs//HPP 3-160 Stat//Skip Shift Eliminator//B&M Ripper Shifter//SLP LT Headers-SLP ORY No Cats//Borla Cat Back//Dynomax Bullit//ECT...

 

Big difference, get the Loudmouth, I can't remember where I dug up the info at but flowmaster is one of the worst performance flow mufflers you can buy.

But even if it's not and my memory serves me wrong, I'd still get the Loudmouth


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2001 Camaro SS A4 #4586
Mods: Holley Powershot Filter, WaterWetter, MSD 8.5mm Super Conductor Wires, NGK TR55's, Shaner S2 Polished TB, SLP LT Headers, SLP Loudmouth, SLP Airlid, SLP Bellows, SLP SFC's, 160-Tstat, !FRA, !TB, !MAF Screen, Yank PY3600E, Spohn Adjustable Torque Arm
Coming Soon: Baer Eradispeed Cross-drilled & Sloted Rotors, LS1Edit, Stage 2 heads, TR 224/227 .563/.569 Cam
E-mail: eyedol_2000@yahoo.com

 

I HATE flowmasters.


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2001 Pewter Z28 Hardtop auto with a 2.73 gear
The factory freak
COMPLETE MOD LIST:
Whisper Lid w/ K&N filter, DynoMax bullet muffler dumped, Gutted cats, Free air mod, Stock aluminum D.S. (Mine had steel), !MAF screen, !front swaybar, !rear seats

Best ET: 12.59
Best mph: 111.23
Best 60FT on stock tires, stall and
gear: 1.88

2000 Pewter SS 6-speed
Basic bolt-ons, Eibachs & Koni's
Best ET: 13.26
Best MPH: 109.7
Best 60FT: 2.15 (Nittos)

 

slp loudmouth is betr the sound is awsome and i think it prob does more for ya

------------------
Ran 13.398 with shi*ty stock bald tires havn't run with the nittos yet.
AOL SN: stik6shift98
1998 Camaro Z-28

 

Sorry I've got the dyno pulls to prove it. Every time I opened my cutout on my stock muffler I gained 10-12 rwhp. Did this about six times.

After putting on a Flowmaster, when I opened the cutout I still gained 10-11 rwhp ... As you said well within the the margin of dyno error.

If the Flowmaster was flowing more freely than the the stock muffler I would have seen less gain when opening the cutout.