TM 9-2320-209-10-1 (3) On earlier model M44A2 series trucks with LD465-1 and LD465-lC engines, the exhaust system (fig. 2-9) is made up of front and rear exhaust pipes, muffler, and tail- pipe. The exhaust pipes are connected directly to the manifold. 1. Manifold 2. Exhaust pipe 3. Muffler 4. Tailpipe Figure 2-9. Exhaust System Component Location (LD 465-1-1C Engine). 2-11