Duct Insulations

Genuine Duct Insulations for Diesel Engines by Onan, Cummins & Fleetguard

Optimize your diesel engine’s thermal management with our premium duct insulations. Specifically designed for Onan, Cummins, and Fleetguard power engines, these genuine duct insulations provide superior heat resistance, noise reduction, and durability to ensure your equipment operates efficiently under demanding conditions.

Durable Duct Insulations for Enhanced Engine Performance

Our duct insulation range includes high-quality thermal wraps, acoustic insulation, and heat shields tailored to fit your diesel engine’s ductwork. Crafted to withstand extreme temperatures and harsh environments, these genuine insulation parts protect vital components while improving overall engine reliability.

  • Expertly Engineered: Designed to meet OEM specifications for Onan, Cummins, and Fleetguard engines, ensuring perfect fit and function.
  • Thermal & Acoustic Efficiency: Reduces heat loss and engine noise, enhancing operational comfort and safety.
  • Long-Lasting Durability: Made from premium materials to resist wear, corrosion, and environmental damage.

Choose our genuine duct insulations to maintain your diesel engine’s peak performance and extend its lifespan.

Why Choose Our Duct Insulations?

We offer authentic, high-quality duct insulation parts expertly crafted for Onan, Cummins, and Fleetguard engines, ensuring reliable performance, enhanced efficiency, and trusted durability for your diesel power equipment.

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  • ONAN 404-0576 - 4040576 DUCT INSULATION ONAN Genuine OEM Part - Original OEM part - Image 1
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    ONAN 4040576 DUCT INSULATION ONAN Genuine OEM Part

    ONAN

    $35.33
    $32.27
    Genuine ONAN OEM Part designed specifically for Onan and Cummins generatorsProvides superior thermal insulation to maintain optimal engine temperaturesReduces noise and vibration for quieter...
    $35.33
    $32.27
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    Qty in Cart: 0
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    Price:
    $35.33
    $32.27
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  • ONAN 405-8719 - 4058719 LEFT HAND DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 4058719 LEFT HAND DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $577.73
    $527.75
    Cummins LEFT HAND DUCT INSULATION 405-8719 Find the authentic LEFT HAND DUCT INSULATION you need with the Cummins 405-8719. With our high-quality replacement parts, ensure your outdoor equipment...
    $577.73
    $527.75
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    Qty in Cart: 0
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    $577.73
    $527.75
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  • ONAN 405-8718 - 4058718 RIGHT HAND DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 4058718 RIGHT HAND DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $585.24
    $534.62
    Cummins RIGHT HAND DUCT INSULATION 405-8718 Discover the genuine Cummins RIGHT HAND DUCT INSULATION with product SKU 405-8718, crafted to precision for your outdoor equipment. Trust our store for...
    $585.24
    $534.62
    Add to Cart
    Qty in Cart: 0
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    Price:
    $585.24
    $534.62
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  • ONAN 405-8272 - 4058272 LEFT HAND DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 4058272 LEFT HAND DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $548.28
    $500.86
    Cummins LEFT HAND DUCT INSULATION 405-8272 Find genuine Cummins LEFT HAND DUCT INSULATION with SKU 405-8272 in our store. Ensure your equipment remains efficient with this original part designed for...
    $548.28
    $500.86
    Add to Cart
    Qty in Cart: 0
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    Price:
    $548.28
    $500.86
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  • ONAN 405-8271 - 4058271 RIGHT HAND DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 4058271 RIGHT HAND DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $548.28
    $500.86
    Cummins RIGHT HAND DUCT INSULATION 405-8271 Discover the authentic Cummins RIGHT HAND DUCT INSULATION, SKU 405-8271, and ensure peak performance for your outdoor equipment. Our store provides...
    $548.28
    $500.86
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    Qty in Cart: 0
    Quantity:
    Price:
    $548.28
    $500.86
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  • ONAN 405-9969-03 - 405996903 DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 405996903 DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $232.60
    $212.49
    Engineered for Excellence: Precision-crafted duct insulation designed to maintain optimal thermal performance. Durability in Every Detail: Built to withstand the rigors of continuous operation,...
    $232.60
    $212.49
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    Qty in Cart: 0
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    $232.60
    $212.49
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  • ONAN 405-8273-03 - 405827303 FRONT DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 405827303 FRONT DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $171.95
    $157.08
    Cummins FRONT DUCT INSULATION 405-8273-03 Discover the authenticity and precision of the Cummins 405-8273-03 FRONT DUCT INSULATION, meticulously crafted to ensure optimal performance for your...
    $171.95
    $157.08
    Add to Cart
    Qty in Cart: 0
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    Price:
    $171.95
    $157.08
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  • ONAN 405-8273-04 - 405827304 FRONT DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 405827304 FRONT DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $245.56
    $224.32
    Precision-engineered protection for lasting generator performance Enhances thermal insulation to maintain optimal engine temperature Genuine OEM ONAN part ensuring perfect compatibility and...
    $245.56
    $224.32
    Add to Cart
    Qty in Cart: 0
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    Price:
    $245.56
    $224.32
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  • ONAN 405-9969-02 - 405996902 DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 405996902 DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $106.52
    $97.30
    Engineered for enduring thermal efficiency and noise reduction. Optimizes airflow while safeguarding critical components from heat damage. Guaranteed OEM quality from ONAN for perfect fit and peak...
    $106.52
    $97.30
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $106.52
    $97.30
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  • ONAN 405-9969-01 - 405996901 DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 405996901 DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $97.07
    $88.68
    Enhance your generator’s reliability with precision-engineered insulation Maintains optimal temperature control for sustained engine performance Crafted by ONAN, guaranteeing full OEM compatibility...
    $97.07
    $88.68
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $97.07
    $88.68
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  • ONAN 405-7990-01 - 405799001 DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 405799001 DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $80.95
    $73.95
    Precision engineered for enduring performance and energy efficiency. Thermal protection that safeguards your generator’s critical components. Reduces heat loss and noise for quieter, more efficient...
    $80.95
    $73.95
    Add to Cart
    Qty in Cart: 0
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    Price:
    $80.95
    $73.95
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  • ONAN 405-8273-02 - 405827302 FRONT DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
    Add to Cart

    ONAN 405827302 FRONT DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $76.03
    $69.45
    Precision-engineered to enhance thermal performance and reliability Designed for superior heat insulation to protect your generator’s front duct Durable materials guarantee long-lasting resistance...
    $76.03
    $69.45
    Add to Cart
    Qty in Cart: 0
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    Price:
    $76.03
    $69.45
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  • ONAN A035C180 - DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN A035C180 DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $28.44
    $25.98
    Reliability engineered for every watt generated Superior thermal insulation to maintain optimum engine temperature Durable material design specifically tailored for ONAN generators 100% Genuine OEM...
    $28.44
    $25.98
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $28.44
    $25.98
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  • ONAN A030C408 - DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
    Add to Cart

    ONAN A030C408 DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $33.60
    $30.70
    Engineered for excellence: optimize your system's thermal management with precision duct insulation. Exceptional thermal resistance: safeguards your generator’s operational integrity under rigorous...
    $33.60
    $30.70
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $33.60
    $30.70
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  • ONAN 405-9732 - 4059732 DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
    Add to Cart

    ONAN 4059732 DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $34.89
    $31.88
    Precision-engineered insulation for optimal thermal management Enhances energy efficiency by maintaining consistent duct temperatures Certified genuine OEM component crafted by ONAN for seamless...
    $34.89
    $31.88
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $34.89
    $31.88
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  • ONAN 405-9731 - 4059731 DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
    Add to Cart

    ONAN 4059731 DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $31.15
    $28.46
    Precision-engineered thermal protection for optimal generator performance Durable insulation material ensures long-lasting heat resistance and noise reduction Genuine OEM ONAN component,...
    $31.15
    $28.46
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $31.15
    $28.46
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  • ONAN 405-9616 - 4059616 DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
    Add to Cart

    ONAN 4059616 DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $23.28
    $21.27
    Engineered for unmatched thermal protection and lasting durability. Optimizes generator airflow and noise reduction for quiet operation. Crafted as a genuine ONAN OEM component to guarantee flawless...
    $23.28
    $21.27
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $23.28
    $21.27
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  • ONAN 405-6992 - 4056992 DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 4056992 DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $15.55
    $14.20
    Maximize your generator's efficiency with precision-engineered duct insulation Enhance thermal protection and reduce heat loss Designed exclusively by ONAN for seamless integration and guaranteed...
    $15.55
    $14.20
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $15.55
    $14.20
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  • ONAN 405-8498 - 4058498 INSULATION OUTLET DUCT Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 4058498 INSULATION OUTLET DUCT Original ONAN/CUMMINS OEM part

    ONAN

    $7.10
    $6.49
    Cummins INSULATION OUTLET DUCT 405-8498 Our store proudly offers the original INSULATION OUTLET DUCT with SKU 405-8498 from the renowned brand, Cummins. This high-quality replacement part ensures...
    $7.10
    $6.49
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $7.10
    $6.49
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  • ONAN 405-8492 - 4058492 INSULATION OUTLET DUCT Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
    Add to Cart

    ONAN 4058492 INSULATION OUTLET DUCT Original ONAN/CUMMINS OEM part

    ONAN

    $6.99
    $6.39
    Cummins INSULATION OUTLET DUCT 405-8492 Discover the genuine Cummins INSULATION OUTLET DUCT, SKU 405-8492, at our online store. Crafted with precision, this essential part ensures optimal...
    $6.99
    $6.39
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $6.99
    $6.39
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  • ONAN 405-8491 - 4058491 INSULATION OUTLET DUCT Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
    Add to Cart

    ONAN 4058491 INSULATION OUTLET DUCT Original ONAN/CUMMINS OEM part

    ONAN

    $8.72
    $7.96
    Cummins INSULATION OUTLET DUCT 405-8491 Find the original Cummins INSULATION OUTLET DUCT with SKU 405-8491 at our store for a seamless replacement experience. Our commitment to offering authentic...
    $8.72
    $7.96
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $8.72
    $7.96
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  • ONAN 405-8489 - 4058489 DUCT INSULATION Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
    Add to Cart

    ONAN 4058489 DUCT INSULATION Original ONAN/CUMMINS OEM part

    ONAN

    $8.26
    $7.55
    Engineered to protect and optimize your power system’s airflow Superior thermal insulation reduces heat loss and prevents engine overheating Durable material specifically tailored for Onan...
    $8.26
    $7.55
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $8.26
    $7.55
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