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  • Real men don’t use mufflers

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New Exhaust and Mufflers

2139 Views 29 Replies 10 Participants Last post by  Alwhite00
I finally got around to finishing my exhaust system. It consists of Dynatech Musclemaxx 1-3/4” to 1-7/8” stepped headers. Dynomax Super Turbo 17793 mufflers. 3 inch mandrel bent from front to back with turn downs near the rear bumper. No crossover. Tucked up nicely. Good clearance over the axle.

Sounds good and it tames it down inside the car. Now I have the pleasure of hearing my electric fuel pump. What do you guys think? I’m really happy with it. Plus I have room to grow for future power.

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The best is yet to come. You can't get any kind of idea what an exhaust system will sound like until the exhaust gets a good four or five thousand miles on it. The top muffler out of any other muffler made is the Dyno Max 17749. This muffler has gone through more tests and has passed with flying colors.
I have about 17,000 miles on mine now and wow does it sound fantastic! Crusing, it reminds me of our Chris Craft ski boat we had back in the 60s.The boat had a 348 police enforcer motor that was out fitted for a boat. My el Camino has a 454 truck engine. So while its not a race engine, it isn't really stock, since truck engines are built to rev while keeping a strong torque band.
Mine didn't sound too good with the X pipe but once I removed it, that great big block, Duntov Chevrolet sound came back..
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The exhaust cutouts I used were the old style that you opened by hand. I used to see guys at car cruises always playing with them trying to get them open or closed.
The cutouts really dont do much. They also weaken exhaust velocity.

I've found from my own and others cars is two dedicated runs, all the way to the rear bumper with a muffler right before the rear end. works and sounds best. Those X pipes make the exhaust sound muffled to me. When I removed the Pypes X pipe that came with my car when I bought it, I noticed two things. My car ran just as good if not better and it sounded much better, that cool Chevrolet big block sound was back.
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