390 exhaust
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Elder User
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390 exhaust
What are you 390 guys running as far as dia. and mufflers? Full exhaust, dumped or side exit? Mine has long tubes with 2 1/4 to a pair of 2 1/2 magnaflows but it just sounds like theres a bunch of socks stuffed in the pipes. Ive been thinking of going 2 1/2 with single chamber flows and either side exit or coming out through the bedside with a nice bologna cut coming out about 1/2in past the sheet metal. One last question, I dont have smog on my truck so whats ideal for exhaust? It sounds great with open headers but I dont want to be harassed by the fuzz lol.
More Turbo
Joined: Nov 2007
Posts: 703
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From: Western Washington
My 390 is running a set of headers to some 2 1/2'' pipes to dual Magnaflows, then exit straight out under the rear bumper. Sounds all quiet and mellow until you put your foot in it, then they get loud.
OJ
OJ
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Joined: Apr 2010
Posts: 56
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From: Los Alamos, New Mexico
Just my opinion but, I personally think for performance that 2 1/2" is a little big for a stock 390. 2 1/4" is plenty and I really like the two chamber flowmaster 40 series. Here is an excellent video that shows the different sounds of the flowmaster line. YouTube - Flowmaster Muffler Comparison
I know that it is for a chevy small block and 3" pipes but, it shows the difference between each.
LT.
I know that it is for a chevy small block and 3" pipes but, it shows the difference between each.
LT.
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Elder User
Joined: Jul 2010
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Well I pulled the exhaust of today and found that the pipe going into the collector on the driver side is leaking and its bearly welded on. So this weekend I think in going to find some scrap bends, get new collectors, pipe and fab up my own exhaust.
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