Quote:
Originally Posted by FirstOwner69
I bought a 2-1/2" Heartthrob dual system for my 2WD and am pleased with it. They also make a system for a K20s. The pipes are mandrel bent. Systems are available for 4X4s with behind the wheels or rear exits and with "stock" (#4149SK and or #1014149...actually fairly loud) or glass pack mufflers (#4149GP or #1024149). The part numbers starting with 101 and 102 are rear exit.
I got mine from Auto Accessories Garage with free shipping ( https://www.autoaccessoriesgarage.co...SABEgI42vD_BwE)
The Heartthrob website ( http://www.heartthrobexhaust.com/manifolddualkits.htm) says the system won't work with a Rockwell transfer case.
Perhaps someone here has some personal experience with the 4X4 system.
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I installed their exhaust in my 1970 (chassis) K10 4X4 with an SBC and stock ramhorn manifolds.
My biggest challenge was clearing the NP205 transfer case. To do that I had to shorten the passenger side down tube about 2-3 inches, as well as do a lot of fussing with the mufflers and hangers. I can't say it wasn't challenging (aka PIA), but after a fair amount of trial and error I think it came out okay. The pipes are long enough for a long bed, and have to be shortened just before the mufflers for my short bed. I am using the stock type mufflers and think they sound pretty good.
-Steve