GM & Workhorse Stepvan Exhaust Systems

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  3" Muffler/Exhaust Pipe Clamp

  SKU: 57-300

  3" muffler/exhaust pipe clamp. Guillotine (single saddle) style.

  $4.42

   
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  Aluminized Tail Pipe

  SKU: 57-235

  Tail Pipe, 3" dia. Fits 87-89 Chev P-30 with 350 c.i. engine, double converter (cut for shipping)

  $163.95

   
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  Manifold Studs - 2 Per Pack

  SKU: 57-480

  Manifold Studs - 2 Per Pack

  $6.38

   
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  Right Exhaust Manifold Kit

  SKU: 57-357

  Right Exhaust manifold kit that fits Chevy. 8 Cylinder, 5.7L/350 CID '79-'86, includes: 3 studs, 3 washers, 3 nuts. Order gasket set ... more

  $133.43

   
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  3" Bottom Clamp Bracket

  SKU: 57-267

  3" Bottom Clamp Bracket

  $10.32

   
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  2-1/2" Bottom Clamp Bracket

  SKU: 57-262

  2-1/2" Bottom clamp bracket.

  $4.95$4.21

  Special Sale
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  Left Exhaust Manifold Kit

  SKU: 57-355

  Left exhaust manifold kit that fits Chevrolet 8 cylinder 5.7L/350 CID '79-'86, includes: 3 studs, 3 washers, 3 nuts - Order gasket se... more

  $109.93

   
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  Aluminized Muffler

  SKU: 57-222

  Muffler, fits 76-81 Chev P-30 with 350 c.i. engine

  $103.95$98.75

  Special 10 available.
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  Universal Exhaust Pipe Hanger - ( 1/2" Diameter )

  SKU: 57-268

  Universal exhaust pipe hanger - Can be bolted or welded to frame - ( 1/2" diameter )

  $16.60

   
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  Right Exhaust Manifold with Gasket & Hardware

  SKU: 57-383

  Right exhaust manifold with gasket & hardware

  $222.14$199.93

  Special 1 available.
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  Y-Pipe

  SKU: 57-240

  Y-pipe for 6.5L diesel

  $557.95$518.89

  Special 3 available
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  Manifold Bolt Kit

  SKU: 57-395

  Manifold Bolt Kit, 12 pcs. Fits 6.0L. Bolt Size: M8-1.25 x 30M.

  $16.38

   
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  Aluminized Extension Pipe

  SKU: 57-211

  Aluminized extension pipe, 14ga, 2-1/2 dia. x 59-3/4", '76-87 for 178" WB, cut for shorter wheelbase.

  $56.50$48.03

  Special 4 available.
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  Manifold Gasket Set

  SKU: 57-390

  Gasket set, 3 pieces. Fits all manifolds shown on this page.

  $13.95

   
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  Right Exhaust Manifolds with Gasket & Hardware

  SKU: 57-370

  Right exhaust manifolds with gasket & hardware

  $328.37

   
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  Exhaust Manifold Kit 4.8L Gas Engine - Left Side

  SKU: 57-378

  Exhaust manifold kit 4.8L gasoline engines - Drivers Side

  $166.95

   
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  Left Exhaust Manifold with Gaskets & Hardware

  SKU: 57-382

  Left exhaust manifold with gaskets & hardware

  $296.42

   
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  Left Exhaust Manifold Kit

  SKU: 57-360

  Left Exhaust Manifold kit that fits Chevy. 8 Cylinder 5.7L 350 CID '87-95, includes: 3 studs, 3 nuts. No additional donut needed. Ord... more

  $141.79

   
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  Right Exhaust Manifold Kit, 4.8L

  SKU: 57-379

  Right exhaust manifold kit 4.8L gasoline engines

  $141.34

   
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  Left Exhaust Manifold with Gasket & Hardware

  SKU: 57-369

  Left exhaust manifold with gasket & hardware

  $134.05$117.96

  Special 1 available.

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.