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Re: full length exhaust vs fr. of tire noise level
I've had 3 dual exhaust systems on these trucks and here is my take:
Full length headers, 3" 40 series flowmasters (2 chamber), no crossover side exit behind the rear wheels, long bed. Loud, substantial interior resonance, good pop but not too harsh.
Factory manifolds, 2" +/- short glass packs no crossover, straight out the back, short bed. Loud glass pack crack, not as loud in the cab as out, but still quite a bit of noise while cruising.
Currently full length headers, 2.5" 50 series flowmasters (3 chamber), summit h-pipe, side exit behind the rear wheels, short bed. Really deep but mellow sound. Not too much resonance at all while cruising. I haven't gotten after it since I got this installed (less than a month ago) because it has been pretty slick out, but I like it a lot. I've noticed my wing windows whistle, and I never noticed with the glass packs.
Exhaust note is very subjective, but if you are trying to quiet it down and mellow it out on the cheap I would add an h-pipe and extend the exhaust to the rear, either straight out the back or behind the rear tires. I prefer behind the tires on old trucks but again to each their own.
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