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Aluminized muffler, (2) 2-1/2" inlet, (1) 3" outlet, '96-On GM/Workhorse
Hanger for Double Pipe - 1996 - On GM / Workhorse including the W42 RV chassis.
Aluminized tail pipe, 3" dia. Formed in two pieces for shipping purposes. 1991-on
Y-Pipe, .made with 409 stainless steel
2-Piece 'Y' pipe for the 4.8L and 6.0L Workhorse Chassis. Your original 'Y' pipe is connected at the base by a 'Football Flange'. By ... more
Left Exhaust Manifold Kit - 6.0 Liter Engines. Includes 3 studs, 3 nuts and a gasket - Drivers Side
Muffler with 3" fittings. Fits 87-on Chev P-30 with 350 c.i. engine
Right Exhaust Gasket. Fits on the right side of our 57-280 Y pipe and fits our pipe 57-9163
Pipe Extension, 3" dia. x 55" long. Fits 87-on Chev P-30 with 350 c.i. engine
Left Exhaust Gasket. Fits on left side of our Y pipe 57-280. Also fits our 57-9162 left side exhaust pipe.
Right Exhaust Manifold kit that fits Chevrolet 8 cylinder, 350 CID '87-ON, includes: 3 studs, 3 nuts, 3 springs. Come with Preheat Sh... more
Left Exhaust Manifold kit that fits Chevrolet 8 cylinder, 350 c.i. engine, 1996-on. Order gasket set 57-390 separately.
Right Exhaust Manifold Kit - 6.0 Liter Engines. Includes 3 studs, 3 nuts and a gasket - Passenger Side
Aluminized extension pipe, 14ga, 2-1/2 dia. x 59-3/4", '76-87 for 178" WB, cut for shorter wheelbase.
3" muffler/exhaust pipe clamp. Guillotine (single saddle) style.
Football shaped flange gasket, fits 4.3L, 4.8L, 5.7L and 6.0L
Universal pipe hanger. Heat this 1/2" dia. x 11" rod and bend it around pipes or mufflers and weld it on. or use two, one welded to t... more
Mill Supply's GM/Workhorse exhaust system line covers a vast amount of applications and it keeps on growing. We stock parts that fit from 1976 chassis' to today's most current chassis'. We also carry parts for the 1982-1994 6.2L diesel chassis as well as the 1995-present 6.5 liter diesel chassis. We make it a priority to be able to have the parts you need no matter how old or new your stepvan may be.
Our newest addition to our GM/Workhorse line is a two piece Y pipe. It fits the 4.8L and 6.0L Workhorse gasoline chassis'. Our staff designed this new Y pipe to eliminate the "football flange" design which is known for causing cracking by the manifold. The cracks by the manifold are a result of the flange design which does not enable the pipes to flex.