Inboard Boat Parts

Keep your inboard boat running strong with genuine replacement parts for Mastercraft, Supra, Moomba, and other top performance brands. Whether you own a ski boat, wakeboard boat, or wakesurf boat, WaterSkis.com has the inboard boat parts you need to keep your time on the water uninterrupted.

Explore our curated selection of Mastercraft boat parts, Supra boat parts, Moomba boat parts, and more—sourced from trusted OEMs and aftermarket brands known for quality, compatibility, and long-term durability. Our inventory includes engine components, electrical parts, ballast fittings, and maintenance essentials tailored to inboard boats used for watersports.

Not sure what fits your boat? Use our Boat Part Lookup Tool to match parts by make, model, and year for total confidence. At WaterSkis.com, we’re committed to helping you get back to skiing, surfing, and riding—with gear that performs when it counts.


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  • Ilmor Transmission Oil Filter | 1173

    Ilmor Transmission Oil Filter | 1173

    Ilmor
    $72.99
    Ilmor Transmission Oil Filter | 1173 This genuine Ilmor ZF Transmission Filter is made with a metal base plate for superior strength specifically designed to work with your ZF Ilmor transmission. The design offers the Ilmor recommended level of...
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    $72.99
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  • Midwest Water Sports Dock Lines Midwest Water Sports Dock Lines

    Midwest Water Sports Dock Lines

    $15.99
    Midwest Water Sports Dock Lines Grab your custom Midwest Water Sports Dock Line for this summer to safely tie up your boat anywhere you go! These dock lines are 3/8" double braided, and 15' in total length. 
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    $15.99
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  • MasterCraft Muffler | Stbd Only | 2020+

    MasterCraft Muffler | Stbd Only | 2020+

    MasterCraft
    $464.99
    MasterCraft Muffler | Stbd Only | 2020+ 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.  
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    $464.99
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  • MasterCraft Muffler | Stbd Side Only | 6.2L/7.4L

    MasterCraft Muffler | Stbd Side Only | 6.2L/7.4L

    MasterCraft
    $749.99
    MasterCraft Muffler | Stbd Side Only | 6.2L/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.  
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    $749.99
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  • MasterCraft Muffler | Stbd Side Only | 5.7L/6.0L

    MasterCraft Muffler | Stbd Side Only | 5.7L/6.0L

    MasterCraft
    $729.99
    MasterCraft Muffler | Stbd Side Only | 5.7L/6.0L 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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    $729.99
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  • MasterCraft Muffler | Port Only| 2020+

    MasterCraft
    $464.99
    MasterCraft Muffler | Port Only| 2020+ 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.  
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    $464.99
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  • MasterCraft Muffler | Port Side Only | 6.2L/7.4L

    MasterCraft Muffler | Port Side Only | 6.2L/7.4L

    MasterCraft
    $749.99
    MasterCraft Muffler | Port Side Only | 6.2L/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.  
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    $749.99
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  • MasterCraft Muffler | Port Side Only | 5.7L/6.0L

    MasterCraft Muffler | Port Side Only | 5.7L/6.0L

    MasterCraft
    $729.99
    MasterCraft Muffler | Port Side Only | 5.7L/6.0L 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.  
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    $729.99
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  • MasterCraft Muffler | 6.2L PS | 081

    MasterCraft Muffler | 6.2L PS | 081

    MasterCraft
    $639.99
    MasterCraft Muffler | 6.2L PS | 081 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.  
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    $639.99
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  • MasterCraft Muffler | 5.7 ProStar Kit | 007

    MasterCraft Muffler | 5.7 ProStar Kit | 007

    MasterCraft
    $1,229.99
    MasterCraft Muffler | 5.7 ProStar Kit | 007 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.  
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    $1,229.99
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  • MasterCraft Muffler | Stainless Steel Flange w/Flap | 041

    MasterCraft Muffler | Stainless Steel Flange w/Flap | 041

    MasterCraft
    $499.99
    MasterCraft Muffler | Stainless Steel Flange w/Flap | 041 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.  
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    $499.99
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  • Supra | Moomba Muffler - Muffler Only - 340 Catalyst - dual 3.5" inlets/outlets

    Supra | Moomba Muffler - Muffler Only - 340 Catalyst - dual 3.5" inlets/outlets

    Skiers Choice
    $1,399.99
    Supra | Moomba Muffler - Muffler Only - 340 Catalyst - 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...
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    $1,399.99
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  • Supra | Moomba Muffler - 3.5" inlet w/60° angle - 3.5" outlet

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

    Skiers Choice
    $624.99
    Supra | Moomba Muffler - 3.5" inlet w/60° angle - 3.5" 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.  
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    $624.99
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  • Supra | Moomba Muffler - 3.5" Inlet w/ extended 60° angle, 3" out

    Supra | Moomba Muffler - 3.5" Inlet w/ extended 60° angle, 3" out

    Skiers Choice
    $599.99
    Supra | Moomba Muffler - 3.5" Inlet w/ extended 60° angle, 3" out 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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    $599.99
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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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Whether you're fixing a small issue or tackling a full-season tune-up, WaterSkis.com is your go-to source for inboard boat parts that match your boat and your lifestyle. We carry trusted parts for MasterCraft, Supra, Moomba, and other leading ski and wakeboard boats—all backed by our expert support. Need help finding the exact part? Use our Boat Part Lookup Tool for a fast, accurate match. And don’t forget to check out related categories like Boat Cleaning Products and Ballast System Parts to complete your setup.