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Yamaha Raptor 660 DRI 660cc National Engine Kit - Duncan Racing

    https://www.duncanracing.com/4-stroke-engine/yamaha-raptor-660-national-engine-kit
    Duncan Racing's Complete 660cc Engine Performance Package for the Yamaha Raptor. Includes: Fat Boy 4 Complete Exhaust System, 660cc Forged JE Piston Kit (12-1 or 10.75-1 …

Yamaha Raptor 660 Bolt-on Kit — Duncan Racing

    https://www.duncanracing.com/4-stroke-engine/yamaha-raptor-660-bolt-on-kit
    Yamaha Raptor 660 Bolt-on Kit. 0.00. DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving reliability. Product Information: S-1 Kit #BK4 …

Yamaha Raptor 660 Camshafts — Duncan Racing

    https://www.duncanracing.com/4-stroke-engine/yamaha-raptor-660-camshafts
    Please call Duncan Racing International and a DRI staff member will assist you by collecting the required specifications and placing your order. Thank you. ... Yamaha Raptor 660 Camshafts. …

Yamaha Raptor 660 4-Stroke Power Exhaust-Lifetime Warranty

    https://www.duncanracing.com/4-stroke-exhaust/fb4-ey3660
    Best Raptor 660 Exhaust. Outstanding Performance Gain-Excellent Reliability-Great Value. Lifetime Warranty. Money Back Guarantee. Made in USA. #1 Raptor 660 Pipe. Learn More ...

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