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Manifold Conversion Kit for Mercruiser V6


  • Part #: BPI58992

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Manifold Conversion Kit is designed to convert all Single Piece Exhaust Manifolds to the Center Riser Manifolds on V6 4.3L Engines with GM 262 CID Blocks from 1996 to 2000 that have Raw Water Cooling.
Kit includes 2 Manifolds, 2 Risers, 2 Elbows, Exhaust Tubes, Gaskets, Hardware (as pictured)
*Does NOT contain original exhaust tube (OEM: 32-807458T) to be used with original Y-Pipe. You may re-use original exhaust tube with this kit.
Used to replace One-Piece manifold/risers like these:
Mercruiser V6 1-piece riser-manifold
Replaces Osco part # OMC643-KIT; HGE # 58992; GLM # 58992; Mallory # 9-40600
Cross Reference Component Part Numbers
Mercury Quicksilver Manifolds 99746A17
  Risers 807988A2, 44354A3
Osco Manifolds 9745
  Risers 4354
Barr Manifolds MC-1-99746
  Risers MC-20-44354
GLM Manifolds 51220
  Risers 51140
Sierra Manifolds 18-1952-1
  Risers 18-1976-1
HGE Manifolds 9746
  Risers 4354
Mallory Manifolds 9-40505
  Risers 9-40559

Extra Shipping applies for Manifold/Riser Kits: $59 for states east of the Mississippi, $79 for states west of the Mississippi
Cast Iron Exhaust Parts come with a 3-Year Manufacturer's limited warranty!

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