Dual Exhausts
Thread Starter
Heel & Toe
Joined: Aug 2005
Posts: 17
Likes: 0
Dual Exhausts
I recently put a new exhaust system on my 81. I left the H pipe cat assembly out and just did true duals straight back to Flowmaster 40 series mufflers.
Can anyone offer any comments good or bad? I wanted to get a few more ponies out of that choked 350, but I don't want to mess anything up either ...
Can anyone offer any comments good or bad? I wanted to get a few more ponies out of that choked 350, but I don't want to mess anything up either ...
Melting Slicks
Joined: Aug 2003
Posts: 2,135
Likes: 2
From: Dayton Oh
I've been running true duals the last few years without an H or X. I don't think they contribute to any noticable performance. However, I'm sure they will tone down the exhaust more than straight pipes.
Melting Slicks
Joined: Dec 2004
Posts: 2,161
Likes: 0
From: pr, frederick md.
Originally Posted by 77BuffaloVet
I have headers with 2 1/2 pipes straight back with no crossover... sound great and increased performance...
Pro
Joined: Feb 2005
Posts: 627
Likes: 5
From: Frisco TX
I just put on Dynomax ceramic headers with 2.5 inch exhaust back to Flowmaster 40's. A little loud for me but I can live with it. The part I'm not sure if I can live with is the resonance at about 40mph. BTW, I have a '74 L-48 with true duals.
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Le Mans Master
Joined: Sep 2000
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From: Westfield Indiana
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I had Dynomax ceramic coated headers, true duals with H-pipe just behind tranny, going out to Flowmaster Deltaflow 50 series mufflers and loved the sound. I also had electric cutouts for that added noise when I wanted it. The 81 cats were less restrictive than the 79 cats, but if you add headers, I would recommend tuning the carb because you will probably start to run lean.
