Exhaust Muffler for 4in. Round Glasspack Performance Exhaust Muffler MagnaFlow 18129 drive-shafts-and-parts Hooker recommends using cast iron

Hooker recommends using cast iron exhaust manifolds or old headers to break in new engines to avoid coating damage

2 L L6 1972 - 1973 Jeep J-4700 258/4

9 V8 1968 - 1974 Pontiac Firebird 400/6

Mechanical Bond Between Layers

Includes O-Rings

Exhaust Muffler for 4in. Round Glasspack Performance Exhaust Muffler MagnaFlow 18129 drive-shafts-and-parts Hooker recommends using cast ironOverview: MagnaFlow Glasspack mufflers feature a reversible straight through design and with single stage packing these mufflers bring back that classic deep glasspack sound. Interchange: Brand Interchange Part Number Application: Year Make Model Submodel Engine Size Universal Specs: Body Finish Aluminized Series Glasspack Exhaust Tip Quantity 0 Overall Length (In.) 22 Subtitle Center Center Title 4" Round Glasspack Outlet Type Center Outlet Quantity