I have a 2" diameter 18" long Cherry Bomb glasspack attached to each pipe from Langdon cast irons. Both pipes come out in front of the left rear tire. My son wanted it be loud and sound cool. It does both of those, but at about 3500 you can't hear yourself think in the cab ('67 C-20 with no cab insulation other than the padding under the floor mat.)
I'm sure my neighbors are happy with me on the days I drive it to work (I leave between 5:15a and 5:40a).
Panic and Armond are right - there is such a thing as too loud and I'm sure my son and I have found it.
We're currently trying to find a quieter conversion. Any advice is appreciated.
p.s. - it is pretty neat though to watch traffic part like the Red Sea when merging from an on ramp in heavy traffic - especially when along a concrete retaining wall
swap them out for the generic turbo mufflers at your local muffler shop...or go with a Y pipe into a single 2.5" pipe, into a single turbo muffler.
