Polaris Predator Piston Kit - Wiseco - 3905XK, 12.5:1 CR, 99.20 mm Bore - `03-`07. A direct-fit forged piston kit engineered for Polaris Predator applications from 2003–2007, built to replace worn components and restore compression and reliability.

This Wiseco piston kit is designed specifically for 4-stroke powersports engines, using dedicated forgings and tight machining tolerances to provide consistent strength and service life. The forging process improves tensile strength versus cast pistons, and the kit is supplied complete with piston rings, wrist pin(s), and circlips for straightforward installation. Engineered, forged, and machined in Mentor, OH, the 3905XK pistons match the stock bore specification and compression profile for the listed Predator models; verify fitment for your exact year and configuration before ordering.

Features

• Fitment: Polaris Predator `03-`07 (confirm specific model/year)
• Bore: 99.20 mm (standard bore)
• Compression Ratio: 12.5:1
• Includes: high-quality piston rings, wrist pin(s), and circlips
• Forged 4-stroke piston, engineered and machined in the USA (Mentor, OH)

If you have questions or need help confirming fitment, call us directly — we’re happy to assist. Austin, TX customers can reach us at 512-982-9393 (TX), and Los Angeles area customers can call 562-981-6800 (CA). We have two locations (Austin, Texas and Los Angeles, California area) where we offer installation and customization services. If you’re considering multiple items, contact us for possible shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov