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Discussion Starter · #1 ·
Has anyone used that "american thunder" exhaust system? I have one on it's way. Are there are any complications I might run into. I'm putting it on a '66 el camino with a big block. Is it an easy bolt up?
 

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Guy's,

Are the series 30 mufflers that are provided with the American Thunder package too loud?
Might you be able to compare them with the series 40 mufflers, which I have had in the past, and I thought were too loud.

Argus
 

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I used the 2 1/2 inch system on my BB elco. I am pleased with it but I am dissapointed with the boat sound of the muffers on take off.


I wish I could return the muffs and get a different style.
I used the 3 chamber deltas. Plenty loud but don't like the take-off sound. otherwise sound good.

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Mr. D



72 454 El Camino turbo400
68 Camaro RS/SS 350 M4
73 RS/LT/Z28 Camaro M4
99 Firebird TA WS-6 A4 Color: Pewter
1995 WWW LT-1 Caprice A4
An all GM site http://www.gmforums.com

[This message has been edited by Mr. D (edited 12-12-2001).]
 

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Sprout, I am using the Flowmaster 30 series mufflers on the 3in system on my 66. I am running a Dr Gas-X crossover (3.5 in, 3 out) and 3in tailpipes to the bumper. I think these sound really nice. Not to loud, not to quiet. Nice rumble at idle as well.

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Tom Wood
Gold Member #66
502 Powered '66 SS

Some pictures of my '66 under construction;
My 66 Pictures
 

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one question, for the XX series of the flowmaster, as the numbers increase, does that mean its louder, or does a lower number mean its louder? thanks

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70 El Camino SS 396
3.73 with a 12 bolt

have pics taken, but just need to upload them somewhere.....cmon alan
 

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Im not positive, but I think the 40 series is louder then the 30 series? I think there is one louder then the 40 series, but its a one chamber race muffler. 50 series is a 3 chamber, and 70 series is suppose to be only slightly larger then stock (my friend has thse on his firebird, it is very quiet).

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Justin Kramer
[email protected]
1968 Chevelle 300 Deluxe Sport Coupe 350ci
1978 Malibu Classic 305ci
Everyone wants their car to look stock and haul ass, my car looks ass; hauls stock.
 

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I used the American Thunder system on my 67 BBC and I'm very pleased with it. The 30 series mufflers aren't nearly as loud as I expected them to be. Aside from a bit of welding to the header collectors, it was a bolt in, so-to-speak. For my car, they have two sets of exhaust tips; the factory style exit location (down and out just behind the rear tire) and straight out the back. I elected to use the latter but left them short of the rear bumper and pointed them down.

I recorded a short .WAV in my garage.

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Dale McIntosh
TC Gold #92/ACES #1709
67SS & 67 Elky
Dale's Place
Team 67
Integrity: If you have it, it doesn't matter - If you don't have it, it doesn't matter.
 

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I have this system on my 68, I also have the Hotchkiss braces that connect the lower and upper control arm mounts. The only difficulty I had was the mufflers barely fit between the bolts for the braces. I think they actually rub a bit, but I've had no problems.

chris
 

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I put the kit on my 67 BB too, but with the Dynomax mufflers, coming straight out the back. I was on my back on the garage floor,
and hung the whole kit without any help. I got my bones into positions I didn't think were possible. If it didn't go together so well, I'd have ended up in traction.
After I was done I took it to a shop just to have a few tack welds put on. I like the sound of the Dyno's.

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Don - Chicago 'Burbs
Yous got a problem wit dat?
'67 Malibu Street Machine
"Under Construction" - Still!
Parts left over = Less weight!
Gold #43
 

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I have the American Thunder with 30 series on my 67 Malibu. Its all 2 1/2. Prior to the switch I ran 40`s. I like the tone of the 30`s better when Im doing 70 on the highway. Kind of a hollow gutteral growl is my description. Nice idle tone and little cab resonance. Kit was a breeze and mandrel bends are where its at.
 

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Discussion Starter · #15 ·
I just got if from UPS just now. Thanks for the help you guys. I'm going outside to put this stuff on!


now, if I could only order paint through the mail......
 
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