Lower stack with quiet muffler insert has a taper lock top and 5"ID expanded end bottom. Lower stack fits between the top stack and elbow to create a complete stack. Taper Lock design gives you a seamless fit and the flexibility to replace specific parts instead of the entire stack. These semi truck stacks measure 5" dia x 52"L. The 52" lower stacks fit most Peterbilt 379, Kenworth W900L, Freightliner, and Western Star models. One year manufacturer's warranty.
Sold individually.