whcih will sound better on my 86 Z28 w/ LG4, edelbrock headers, gutted cat: 80 series 2.5" flowmaster exhaust or 3" american thunder exhaust? if 1 is louder, then how much louder?

 

I am not 100% sure, but I think the American Thunder system comes with an 80 series muffler. But I don't know. Also, I have heard that Flowmasters sometimes sound crappy with gutted cats. I have the 3" American Thunder on my car with headers and a high-flow cat and it sounds awesome.

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1984 Camaro Sport Coupe - 73K Miles, Rebuilt 355 TPI L98, Crane 2032 CompuCam - 214/220 @ .050", Crane adjustible fuel pressure regulator, custom burned PROM, stock TPI intake, gutted air box with K&N filters
F41 Suspension Package, 700R4 Tranny, 3.27 Disc Brake Posi Rear
Hooker Shorty Headers, Catco High-Flow 3" Cat, Flowmaster 3" American Thunder Cat-Back
New Paint
Best 1/4 Mile Run (with old LG4 motor):
16.760 @ 80.74 MPH

Coming Soon:
Aluminum Drive Shaft

 

If you go to Flowmaster's website you'll see where the American Thunder system for our cars have 50 series mufflers. Right now I'm running the stock intermediate pipe with an 80 series Flowmaster and muffler turndowns. Oh yeah, I have an open element air cleaner too. But the muffler turndowns did ALOT for the sound of the car. I wonder what it would sound like with an Aerochamber muffler! My car has a REALLY deep tone now and it almost hurts my ears at cruisin' RPMs but I'm very satisfied with the turndowns. But my 80 series just sounds too tinny and I hate it!

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91 Camaro RS - Black with red tweed - t-tops - 700 watt sound system - 14x3 open element - 80 Series Flowmaster - muffler turndowns - Poly transmission mount - Future 12 second street car

88 TransAm GTA - WS6 - red with grey cloth - K&N Filters - TPIS Airfoil - Wonder Bar - Future Restoration

 

What are the turndowns that you talk about, and where to get them, and for how much. thanks

 

I just went to the muffler shop and told the guy I wanted my pipes to turn down right out of the muffler and he did it. Cost me 20 bucks and I love it. They come straight out of the muffler like 4 inches and then they take a direct plunge to the earth. Gives a nice stealth look and a DEEP sound that get attention alot better than those 3 inch tips I had. Sounds SO much better.

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91 Camaro RS - Black with red tweed - t-tops - 700 watt sound system - 14x3 open element - 80 Series Flowmaster - muffler turndowns - Poly transmission mount - Future 12 second street car

88 TransAm GTA - WS6 - red with grey cloth - K&N Filters - TPIS Airfoil - Wonder Bar - Future Restoration

 

I had the same thing done with my Dynomax Super Turbo, and it sounds very deep under hard accelleration. I did it when I first put the muffler on, not because of sound resonance, but because I don't like to see exhaust tips sticking out from under a 3rd Gen - just my personal preference. But I have heard other Camaro/Fiebirds w/ the Dynomax and tailpipes, and they don't sound near as good as mine do IMO.

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82 Z28 383, Ported 215cc Dart Iron Eagle Heads 72 cc Comb. Chambers, Comp custom grind Hyd roller cam, Speed Pro .250" domes, Wheeler Motorsports 4340 I beam rods, Eagle 5140 steel crank, Weiand Team G intake, Holley 830 DP, hedman headers
Trans: Turbo 350 w/ 4000 stall -- Rearend 7.5 w/ Richmond 4.10's, Auburn Minispool
Best ET:11.60 @ 114.56, w/ a 7.34 1/8 @ 93.50, and a 1.622 60'


89 RS, L03 305, Hypertech Chip,cat delete, Dynomax exhaust,K&N open element Filter,160 stat, MSD coil --Trans:700R4 Corvette Servo -- Rearend: 7.5 GM 3.42 w/ posi-lock

Bassett Racing