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Re: Quiet non-restrictive exhaust?
I've used Dynomax Super Turbos with the 20" case on at least two vehicles over the years. They're not a heck of a lot louder than OE-type mufflers, but they are less restrictive than Flowmasters according to tests done by David Vizard.
If you decide to use OE-type mufflers, keep in mind that they reduce sound by "restriction", so they typically "neck down" 1/2" or more internally. Good for quietness, but bad for power and efficiency. An option is to buy OE-type mufflers that are 1-2 sizes larger than your pipes, and connect them with adapters. For example, 2.5" mufflers on 2" to 2.25" pipes.
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Mike
1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes.
1982 C10 SWB -- sold
1981 C10 Silverado LWB -- sold, but wish I still had it!
1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming.
Retired as a factory automation products salesman.
Worked part-time over the years for an engine builder and a classic car repair shop.
Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!
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