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Re: Exhaust, duels, crossover, H pipe, or Y pipe?
Any crossover like an h allows the exhaust to cross paths, which helps with exhaust scavenging, takes some of the harshness and *snap* out of the tone. This is how modern exhausts are designed, and thus what would be "expected" on an LS motor. Not running one is ok as well, but as mentioned, there are a couple of percievable drawbacks.
Right after the trans is the common place for one, since its the first place where there is usually room to run a 2"+ pipe. Anywhere under the cab should be fine.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING 
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