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4-Stroke Bolt-on Kits
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Enlarge Honda TRX 450R ('06-'08) Bolt-on Kits
Honda TRX 450R ('06-'08) Bolt-on Kits DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving reliability

Part No. BK4-4456
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Enlarge Yamaha YFZ 450 ('04-'08) Bolt-on Kits
Yamaha YFZ 450 ('04-'08) Bolt-on Kits DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving reliability

Part No. BK4-3450
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Enlarge Suzuki LT R450 ('06-'08) Bolt-on Kit
Suzuki LT R450 ('06-'08) Bolt-on Kit DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving

Part No. BK4-2R45
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Enlarge Yamaha Raptor 700 ('06-'08) Bolt-on Kit
Yamaha Raptor 700 ('06-'08) Bolt-on Kit DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving reliability

Part No. BK4-3700
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Enlarge Honda TRX 450R (04-05) Bolt-on Kits
Honda TRX 450R (04-05) Bolt-on Kits DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving reliability

Part No. BK4-4450
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Enlarge Suzuki LTZ 400/Kawasaki KFX400 Bolt-on Kits
Suzuki LTZ 400/Kawasaki KFX400 Bolt-on Kits DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving reliability

Part No. BK4-2Z40
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Enlarge Polaris Outlaw 525 IRS Bolt-On Kit
Polaris Outlaw 525 IRS Bolt-On Kit DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving

Part No. BK4-8524
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Enlarge Honda 400EX Bolt-on Kits
Honda 400EX Bolt-on Kits DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving reliability

Part No. BK4-4000
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Enlarge Yamaha Raptor 660 Bolt-on Kits
Yamaha Raptor 660 Bolt-on Kits DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving reliability

Part No. BK4-3660
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Enlarge Polaris Predator 500 Bolt-on Kit
Polaris Predator 500 Bolt-on Kit DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving reliability

Part No. BK4-8000
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Enlarge Yamaha Raptor 350 Bolt-on Kit
Yamaha Raptor 350 Bolt-on Kit DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving reliability

Part No. BK4-3350
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Enlarge Honda 250X/300EX Bolt-on Kit
Honda 250X/300EX Bolt-on Kit DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving reliability

Part No. BK4-3000
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