Flowmaster Super 10 Muffler 409S - 2.50 Center In / 2.50 Center Out - Aggressive Sound R060002S 6" covers work well on

6" covers work well on 5" springs and pull bar applications

M6 nut pre-installed for easy FHR Installation

1988-1991 GMC R3500

Display boost levels in PSI

1965-1965 Oldsmobile Jetstar I

Flowmaster Super 10 Muffler 409S - 2.50 Center In / 2.50 Center Out - Aggressive Sound R060002S 6" covers work well onSuper 10 Muffler 409S 2. 50 Center In 2. 50 Center Out Aggressive Sound Universal Race Muffler Not a direct fit. Some adaptation required. Super 10 Series 409S stainless steel, single chamber mufflers. Intended for customers who desire the loudest and most aggressive sound they can find. Because these mufflers are so aggressive, they are recommended (Only) for off highway use and not for street driven vehicles. These mufflers utilize the same patented