Inboard Boat Parts

Get the performance and reliability your inboard boat demands with premium replacement parts from WaterSkis.com. Whether you’re maintaining a MasterCraft, Supra, or Moomba boat, we offer a wide selection of genuine and OEM-compatible inboard boat parts to keep your engine, drivetrain, and cooling systems running strong.

From impellers and ignition components to thermostats and transmission parts, every item in this category is curated for quality, compatibility, and long-lasting performance. Not sure where to start? Use our Boat Part Lookup Tool to instantly find the exact part you need for your specific make, model, and engine configuration.

At WaterSkis.com, we know your time on the water matters. That’s why we make it easy to find the right boat parts—fast, accurate, and backed by real-world expertise.


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  • Supra | Moomba Muffler - 0437 - 3.5" in/out inline - approx 15" OAL

    Supra | Moomba Muffler - 0437 - 3.5" in/out inline - approx 15" OAL

    Skiers Choice
    $489.99
    Supra | Moomba Muffler - 0437 - 3.5" in/out inline - approx 15" OAL This is a genuine replacement fiberglass muffler for many Supra and Moomba Boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $489.99
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  • Supra | Moomba Muffler - Muffler Only - V-drive dual 3.5" inlets/outlets

    Supra | Moomba Muffler - Muffler Only - V drive dual 3.5" inlets/outlets

    Skiers Choice
    $1,199.99
    Supra | Moomba Muffler - Muffler Only - V-Drive dual 3.5" inlets/outlets This is a genuine replacement fiberglass muffler for many Supra and Moomba Boats. Muffler Only - Does not include elbow hoses. Use the boat part look up below to ensure you are...
    Qty in Cart: 0
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    $1,199.99
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  • Supra | Moomba Muffler - 3.5" inlet w/60° angle  - 3" outlet

    Supra | Moomba Muffler - 3.5" inlet w/60° angle - 3" outlet

    Skiers Choice
    $559.99
    Supra | Moomba Muffler - 3.5" inlet w/60° angle - 3" outlet This is a genuine replacement fiberglass muffler for many Supra and Moomba Boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $559.99
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  • MasterCraft Muffler | Muffler Only - MCX

    MasterCraft Muffler | Muffler Only - MCX

    MasterCraft
    $1,449.99
    MasterCraft Muffler | Muffler Only - MCX This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $1,449.99
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  • MasterCraft Muffler | Muffler Only- 6.0 VRS - Cadillac

    MasterCraft Muffler | Muffler Only- 6.0 VRS - Cadillac

    MasterCraft
    $1,399.99
    MasterCraft Muffler | Muffler Only- 6.0 VRS - Cadillac This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat. Hose Sold Separately. Not...
    Qty in Cart: 0
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    $1,399.99
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  • MasterCraft Muffler | Muffler Only- 8.1L 4" VRS

    MasterCraft Muffler | Muffler Only- 8.1L 4" VRS

    MasterCraft
    $1,439.99
    MasterCraft Muffler | Muffler Only- 8.1L 4" VRS This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $1,439.99
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  • MasterCraft Muffler | 3.5" In/Out - Stbd Universal

    MasterCraft Muffler | 3.5" In/Out - Stbd Universal

    MasterCraft
    $819.99
    MasterCraft Muffler | 3.5" In/Out - Stbd Universal This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $819.99
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  • MasterCraft Muffler | 3.5"In/Out - Port Universal

    MasterCraft Muffler | 3.5"In/Out - Port Universal

    MasterCraft
    $819.99
    MasterCraft Muffler | 3.5"In/Out - Port Universal This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $819.99
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  • MasterCraft Muffler | 3.5" In/Out - Stbd (7.4L)

    MasterCraft Muffler | 3.5" In/Out - Stbd (7.4L)

    MasterCraft
    $719.99
    MasterCraft Muffler | 3.5" In/Out - Stbd (7.4L) This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $719.99
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  • MasterCraft Muffler | 3.5" In/Out - Port (7.4L)

    MasterCraft Muffler | 3.5" In/Out - Port (7.4L)

    MasterCraft
    $719.99
    MasterCraft Muffler | 3.5" In/Out - Port (7.4L) This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $719.99
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  • MasterCraft Muffler | 3.5" In/Out - Stbd (6.0L/6.2L)

    MasterCraft Muffler | 3.5" In/Out - Stbd (6.0L/6.2L)

    MasterCraft
    $649.99
    MasterCraft Muffler | 3.5" In/Out - Stbd (6.0L/6.2L) This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $649.99
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  • MasterCraft Muffler | 3.5" In/Out - Port (6.0L/6.2L)

    MasterCraft Muffler | 3.5" In/Out - Port (6.0L/6.2L)

    MasterCraft
    $649.99
    MasterCraft Muffler | 3.5" In/Out - Port (6.0L/6.2L) This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $649.99
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  • MasterCraft Muffler | 3.5" In/Out - Stbd (5.7L)

    MasterCraft Muffler | 3.5" In/Out - Stbd (5.7L)

    MasterCraft
    $639.99
    MasterCraft Muffler | 3.5" In/Out - Stbd (5.7L) This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $639.99
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  • MasterCraft Muffler | 3.5" In/Out - Port (5.7L)

    MasterCraft Muffler | 3.5" In/Out - Port (5.7L)

    MasterCraft
    $639.99
    MasterCraft Muffler | 3.5" In/Out - Port (5.7L) This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $639.99
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  • MasterCraft Muffler | 3.5" In/Out - Stbd - MCX

    MasterCraft Muffler | 3.5" In/Out - Stbd - MCX

    MasterCraft
    $614.99
    MasterCraft Muffler | 3.5" In/Out - Stbd - MCX This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $614.99
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  • MasterCraft Muffler | 3.5" In/Out -Port - MCX

    MasterCraft Muffler | 3.5" In/Out -Port - MCX

    MasterCraft
    $614.99
    MasterCraft Muffler | 3.5" In/Out -Port - MCX This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $614.99
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  • MasterCraft Muffler | 4" In w/60° Angle - 3.5" Out w/ 80° Angle - Vertical

    MasterCraft Muffler | 4" In w/60 Degree Angle - 3.5" Out w/80 Degree Angle - Vertical

    MasterCraft
    $689.99
    MasterCraft Muffler | 4" In w/60° Angle - 3.5" Out w/ 80° Angle - Vertical This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat...
    Qty in Cart: 0
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    $689.99
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  • MasterCraft Muffler | 3.5" Offset Inlet/Outlet

    MasterCraft Muffler | 3.5" Offset Inlet/Outlet

    MasterCraft
    $519.99
    MasterCraft Muffler | 3.5" Offset Inlet/Outlet This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $519.99
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  • MasterCraft Muffler | 3" Inline Lift W/60° Angle - 3" outlet

    MasterCraft Muffler | 3" Inline Lift W/60° Angle - 3" outlet

    MasterCraft
    $579.99
    MasterCraft Muffler | 3" Inline Lift W/60° Angle - 3" outlet This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $579.99
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  • MasterCraft Muffler | 3.5" In/Out Inline Horizontal

    MasterCraft Muffler | 3.5" In/Out Inline Horizontal

    MasterCraft
    $564.99
    MasterCraft Muffler | 3.5" In/Out Inline Horizontal This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $564.99
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At WaterSkis.com, we combine deep product knowledge with industry-leading tools to help boat owners find the exact inboard boat parts they need. Whether you're working on a MasterCraft, Supra, or Moomba, our parts deliver the fit and reliability you can trust.

Use our Boat Part Lookup Tool to simplify your search, or explore related categories like cooling systems, engine components, and ignition parts. We’ve got everything you need to keep your boat running at its best.