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Pick a muffler that is free flowing, and suits you taste for the sound. There are alot of choices so you need to go to youtube and view corvettes with different mufflers.
Mufflers will sound different with a longer tailpipe on, so that is why I recommend only listening to corvettes.
If you don't want increased sound then go with stock or something like the walker quiet flow.
If the car is truly stock(especially the exhaust)then nothing will be overly loud.Magnaflow might give it a little rumble and the Dynomax Super Turbo would be a step up and more stock appearing.
If you don't want increased sound then go with stock or something like the walker quiet flow.
If the car is truly stock(especially the exhaust)then nothing will be overly loud.Magnaflow might give it a little rumble and the Dynomax Super Turbo would be a step up and more stock appearing.
The above is a very comprehensive answer.
I had Dynomax Ultra Flows on my 78 from the time it had a stock GW350 (essentially identical to an L48 and similar in tone/aggressiveness to the CFI motor), to the current engine and the motor has a big impact on how an exhaust sounds. With the L-48, there was just a slight rumble vs the Super Turbos which didn't sound much different from stock.
I would not describe my current engine as having a "slight rumble", I can set off some of the more sensitive car alarms driving down the road. It's not Harley loud by any stretch, but most people would say that it's loud.
For a short time I have the Summit street/strip muffler on my '71. They sound just like Flowmaster 40 series but are less than $30 each! I now have side pipes so I got rid of them, but here is how they sounded through the stock engine and stock 2" pipe.