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The Wiseco 675M08400 piston kit is engineered from high-silicon aluminum alloy, ensuring maximum strength and durability for both trail riding and racing applications. Designed specifically for Polaris 400 ATVs, this piston kit enhances engine performance by providing increased horsepower, longevity, and consistent power delivery. The innovative forging design and piston skirt optimize horsepower and torque, making it suitable for demanding riding conditions and competitive racing environments.
Each piston features forged construction, rings, wrist pins, and circlips, all engineered to withstand high-stress operation. The high-tech piston design allows for maximum compression ratios, ultra-stiff strutted forgings, and titanium nitride-coated rings, which contribute to sustained power output and reduced wear. The pistons are E-coated on the crown, ring grooves, and pin bore, offering superior wear resistance and protection against micro-welding, galling, and detonation.
Furthermore, the GP Series pistons generally feature less external machining, which enhances sealing efficiency within the bore for higher compression ratios. The removal of boost ports results in a more predictable powerband and increased top-end pull, making this piston kit ideal for experienced racers and tuners seeking performance gains. Cylinder sleeves are sold separately, allowing for customization based on specific engine modifications. Service intervals can be extended when using Racer's Choice pistons, providing added reliability during intensive racing sessions. This piston kit is a perfect choice for those looking to improve their ATV's performance with a high-quality, durable, and precisely engineered component.
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