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Need Recommendations for '81 Exhaust

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Old Feb 15, 2002 | 02:56 PM
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Default Need Recommendations for '81 Exhaust

I recently installed a high flow catalytic converter on my '81 (four speed). I now want to install a pair of performance mufflers to further reduce back pressure and sweeten the exhaust note. Any suggestions? If so, where's the best place to buy?


[Modified by Biker, 1:01 PM 2/15/2002]
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Old Feb 15, 2002 | 03:09 PM
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Default Re: Need Recommendations for '81 Exhaust (Biker)

I installed Dynomax Super Turbos.....Im very happy with them.
They are louder than stock, but not loud enough to annoy the neighbors.
They will be louder on your car as I havent replaced my Cat yet..and you have a better flowing Cat than stock...but I bet you will like them.
The best price I found was Summit Racing.

Kevin
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Old Feb 15, 2002 | 03:10 PM
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Default Re: Need Recommendations for '81 Exhaust (ksems)

also they have a very stock appearance....:)
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Old Feb 15, 2002 | 03:14 PM
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Default Re: Need Recommendations for '81 Exhaust (Biker)

I just saw that you are in Naperville , IL.

My wife and I met in Naperville, IL back in 1989.
She lived in Cress Creak subdivision off of Ogden Ave by the High School.
I was over off RT59...


small world :D

Kevin
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Old Feb 15, 2002 | 03:22 PM
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Default Re: Need Recommendations for '81 Exhaust (ksems)

Ksema, I live near 87th and Washington. Thanks for the recommendation on the mufflers. Where can I get the best deal on these mufflers?

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Old Feb 15, 2002 | 03:29 PM
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Default Re: Need Recommendations for '81 Exhaust (Biker)

I bought mine almost exactly a year ago..this is the best I could find.

Summit Racing
Part #WLK-17757 Super Turbos 74-82 Corvette $78.69 each
total was $157.00 + $6.95 Shipping = $164.33
http://www.summitracing.com
1-800-230-3030

Kevin
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Old Feb 15, 2002 | 03:30 PM
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Default Re: Need Recommendations for '81 Exhaust (ksems)

I just glanced at their site - looks like they went up to $90.99 each :(

still pretty cheap

Kevin
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Old Feb 15, 2002 | 03:32 PM
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Default Re: Need Recommendations for '81 Exhaust (Biker)

BTW -
be sure to check out
http://www.l81vetteregistry.com

:D
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Old Feb 15, 2002 | 04:06 PM
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Default Re: Need Recommendations for '81 Exhaust (ksems)

Ksems--Thanks for the input. I'll give em a try and let you know what I think. Are you still located in the Naperville area?
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Old Feb 15, 2002 | 04:15 PM
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Default Re: Need Recommendations for '81 Exhaust (Biker)

FLOWMASTER :D three chamber flowmaster with cats will be very mellow. i have two chambers with no cats and i really like it. short of side pipes, i don't know if there is an exhaust i like better. just my $.02 :jester
summit has two chambers for $60/ea and three chambers for $90/ea. more chambers=more 'mellow' (read quiet)
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Old Feb 15, 2002 | 04:17 PM
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Default Re: Need Recommendations for '81 Exhaust (clutchdust)

FLOWMASTER :D three chamber flowmaster with cats will be very mellow. i have two chambers with no cats and i really like it. short of side pipes, i don't know if there is an exhaust i like better. just my $.02 :jester
summit has two chambers for $60/ea and three chambers for $90/ea. more chambers=more 'mellow' (read quiet)
:cheers:
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Old Feb 15, 2002 | 04:33 PM
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Default Re: Need Recommendations for '81 Exhaust (Alwyn678)

I checked the DynoMax and Flowmasters on Summit's website. Both are shown without tips. Aren't they suppose to include tips built into the muffler or am I incorrect. (I'm at my office and don't have my parts catalog handy.)
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Old Feb 15, 2002 | 04:53 PM
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Default Re: Need Recommendations for '81 Exhaust (Biker)

also check with Jeg's http://www.jegs.com, they usually have good prices.
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Old Feb 15, 2002 | 04:53 PM
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Default Re: Need Recommendations for '81 Exhaust (Biker)

tips? you mean shiny, chrome thingies that people stick on their mufflers? the mufflers come with an 'in' pipe and an 'out' pipe, about 3" long. any tips must be supplied by you. pretty stuff doesn't make me go faster so i just had the muffler shop bend a couple pieces of pipe at about 30* and weld 'em in place.
'been thinking about putting a couple of those ricer 6" coffee cans on the back just for S&G :jester
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Old Feb 15, 2002 | 05:08 PM
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Default Re: Need Recommendations for '81 Exhaust (Biker)

I am running a pair of Flowmaster Delta Flow 40's w/true dual 2-1/4" pipes and crossover. I really like them but opinions may vary.
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Old Feb 15, 2002 | 06:30 PM
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Default Re: Need Recommendations for '81 Exhaust (MIKER)

I ordered a pair of DynoMax Super Turbos from Summit Racing for my '81.

Now here's the million dollar question: Will these mufflers sound better with a high flow catalytic converter or a test tube (straight pipe). I have both parts and want to know which setup will offer the least back pressure and best sound.
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Old Feb 15, 2002 | 07:00 PM
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Default Re: Need Recommendations for '81 Exhaust (Biker)

Biker

Performance is best w/ straight pipes. Also the least backpressure & best sound. Sent the million.

Thanks.
:cool:
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To Need Recommendations for '81 Exhaust

Old Feb 15, 2002 | 07:11 PM
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Default Re: Need Recommendations for '81 Exhaust (Biker)

Biker,
I went with the Dynomax Super Turbos on my 82 . . . I think you'll like them. They have a more aggressive sound than the stock cans, but they're not overly loud. Summit Racing had the best price. I also got the free-flow converter. Maybe you could clue me in as to how you got the old converter off. 250lbs of arm strength and a good soaking with "nuts off" hasn't done it yet.
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Old Feb 15, 2002 | 07:22 PM
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Default Re: Need Recommendations for '81 Exhaust (DADS8T2)

go with that straight pipe for less backpressure..more flow...

and no , Im not in Naperville anymore....moved down south to GA....

as far as the tips go, they come in the box with the muffler...an inlet pipe and an outlet pipe/tip.
The outlet pipe is probably what you are referring to....it is bent downward - most people call this the
"tip"

Good Luck - I think you'll love them

Kevin
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Old Feb 18, 2002 | 10:20 AM
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Default Re: Need Recommendations for '81 Exhaust (DADS8T2)

Dads8t2,
The catalytic on my '81 is flanged at both ends. The bolts were rusty. However, with the exception of a couple sets, most of them simply broke in half when I removed them. Try using a breaker bar/socket combination for more leverage. You might also try heating the bolts before removing.
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