Debating exhaust??
Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 2,096
Likes: 15
Debating exhaust??
I have been going back and forth on which exhaust to get for my 82. I know it's going to be a dual kit with Magnaflow mufflers but it's with the headers or keep the stock ones?? If I keep the stock ones I want to cut off the air tubes but don't know if the stockers will flow as much as the aftermarket ones? Then if I go with the aftermarket ones I can keep the originals with the air tubes. What's your thoughts?? 
Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 2,096
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Good thought but using the stock shortys after I grind off the air tubes and weld in the holes you will be able to see the difference. That's what I'm not sure about.
Safety Car
Joined: Oct 2000
Posts: 3,593
Likes: 103
From: Southern Indiana
A set of free flowing mufflers like Dynomax or Pypes mufflers is a better choice or Flowmasters if you have a nice sounding cam to make them thump.
Last edited by Tim H; Apr 7, 2012 at 10:20 AM.
Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 2,096
Likes: 15
[QUOTE=Tim H;1580491423]
Yes you are right, but for the 82 and being the crossfire I'm limited to what I can do as far as performance. This is just gonna be a driver and looking for a slight improvement. I have Flowmasters on there now but can't get the potential out of them as far as sound goes because the cat is drowning them out. I don't like the way they look, in order to get them in there they had to hang them down some and look stupid. I wished Pypes made a kit for the 82 though, used them in the past on a 79 T/A and the kit was awesome, great fit and sound.
Good thought but using the stock shortys after I grind off the air tubes and weld in the holes you will be able to see the difference. That's what I'm not sure about.[/QUOTE
Nothing is better than a set of long tube headers.
A set of free flowing mufflers like Dynomax or Pypes mufflers is a better choice or Flowmasters if you have a nice sounding cam to make them thump.
Nothing is better than a set of long tube headers.
A set of free flowing mufflers like Dynomax or Pypes mufflers is a better choice or Flowmasters if you have a nice sounding cam to make them thump.
Le Mans Master
Joined: Sep 2004
Posts: 5,116
Likes: 5
From: Livonia MI
I'd probably just stay with the stock exhaust manifolds for now, until you decide on headers later. Doubt shorty's will do much, except improve a more tuned exhaust sound. Really nothing like long tube headers, that will beef up mid torque feel.
Team Owner
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
The stock 81-82 exhaust manifolds are some of the best GM ever had. They amount to short tube headers. You will not see enough gain with aftermarket headers to get your money out of them. Your gains will come from dual exhaust.
Keep your stock manifolds and the AIR. The AIR doesn't cost you any performance losses.
All of this is a moot point if you have to pass emissions testing.
Keep your stock manifolds and the AIR. The AIR doesn't cost you any performance losses.
All of this is a moot point if you have to pass emissions testing.
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
Either someone picked the wrong part number, or the installer wasnt very good at their job.
Flowmasters can be tucked up as well as any other muffler.
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Thread Starter
Melting Slicks
Joined: Jun 2011
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Yea exactly, they were on there when I bought the car. No emission testing where I live.
Melting Slicks
Joined: Aug 2010
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From: Palm Beach Florida
St. Jude Donor '12
Nothing wrong with your stock manifolds. They are factory headers. We did this on my buddy's 82. We turned it into a carb. Car. Had the tunes cut and pluged. Works great.
Thread Starter
Melting Slicks
Joined: Jun 2011
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Yes I can plug them but unlike others that are screwed in these are welded so they will need to be cut.
Le Mans Master
Joined: Feb 2011
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From: Southern NH
Those factory stainless manifolds are JUNK. They were put on for weight savings, not performance. Get some long tube headers and the dual system and do it all at once. Also, I prefer Flowmasters. I have Magnaflows with true duals and long tubes and the car is quiet.
Thread Starter
Melting Slicks
Joined: Jun 2011
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I'm not going to use long tubes because no one makes a kit that will just bolt up. Remember the 82 has the cross member with only one hump so you have to make a turn right away and don't think there is room when using long tubes. No I'm not going to replace the cross member.
Racer
Joined: Dec 2007
Posts: 341
Likes: 29
From: vancouver washington
I'm not going to use long tubes because no one makes a kit that will just bolt up. Remember the 82 has the cross member with only one hump so you have to make a turn right away and don't think there is room when using long tubes. No I'm not going to replace the cross member.
Team Owner
Joined: Jun 2000
Posts: 38,923
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From: Southbound
Cruise-In II Veteran
Yes.
Partially true; they are lighter than the older cast iron. They flow better than cast and that offers a performance gain. They are certainly not junk.
Team Owner
Joined: Jan 2006
Posts: 37,637
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From: Crossville TN
If you aren't modifying the engine significantly, you don't need a better exhaust system. Are you getting rid of the catalytic converter too? If so, just buy a nice 2-1/2" aluminized stock exhaust system that will mount up to your present exhaust manifolds. Install whatever mufflers you want, but get aluminized or stainless units that will last a long time.
And, don't plan on being able to sell that car (without the emissions stuff) across state lines or to anyone wanting a 'stock' configuration car.
And, don't plan on being able to sell that car (without the emissions stuff) across state lines or to anyone wanting a 'stock' configuration car.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
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From: Oxford MA-----You just lost the game!!!!
http://www.corvettecentralexhaust.co...mance_dual.php
Just throwing it out there as something to think about if you haven't already.
Keep the shiny side up!
Scott
Just throwing it out there as something to think about if you haven't already.
Keep the shiny side up!
Scott
Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 2,096
Likes: 15
If you aren't modifying the engine significantly, you don't need a better exhaust system. Are you getting rid of the catalytic converter too? If so, just buy a nice 2-1/2" aluminized stock exhaust system that will mount up to your present exhaust manifolds. Install whatever mufflers you want, but get aluminized or stainless units that will last a long time.
And, don't plan on being able to sell that car (without the emissions stuff) across state lines or to anyone wanting a 'stock' configuration car.
And, don't plan on being able to sell that car (without the emissions stuff) across state lines or to anyone wanting a 'stock' configuration car.
Yes I'm getting rid of the cat and I'm looking at the dual kit from CC but whether or not to get them with the headers is my debate. If I could find a used set of manifolds I'd use those and keep my originals.