# Wiseco 90-93 Polaris 350 Trail Boss (639M08150) Piston

Premium materials produce the best sealing technology available exceeding O.E.M. standards. 2-Stroke: Wiseco top end gasket kit; Dedicated forging; Superior strength/weight ratio utilizing Aerospace alloy; Race-proven designs; Chosen by top race teams, in all forms of racing; CNC machined; Optimal cam shape and profile for peak HP and service life; Premium top end needle bearing; Precision-machined, highest-quality materials for strength and reduced friction; High-performance ring set; Extended life and sustained power; Highest-quality alloy pin; Consistently true and durable. 4-Stroke: Wiseco top end gasket kit; Premium materials produce the best sealing technology available, exceeding O.E.M. standards; Dedicated forging; Superior strength/weight ratio utilizing Aerospace alloy; Dome design; Improved flame travel; Chrome plated piston pin; Horizontal slot pin oiling; Reduced friction/scuff resistant; Pressure seal groove; Maximum ring seal; Armor Glide Skirt-Coated available for select models; Dedicated Rings; Maximum compression and oil control.

-   Dedicated forgings and additional lightening operations allow for optimized strength-to-weight ratio
-   Improved tensile strength of forged material optimizes strength and service life
-   Designed and built for each specific 2-stroke powersports engine
-   Includes high-quality piston ring(s), wrist pin(s), and circlips
-   Engineered, forged, and machined in the USA in Mentor, OH

This Part Fits:

Year

Make

Model

Submodel

1990-1993

Polaris

Trail Boss 350L 2x4

Base

1990-1993

Polaris

Trail Boss 350L 4x4

Base

## Details

- **Price:** 354.87 CAD
- **Vendor:** Wiseco
- **Type:** Piston Sets - Powersports

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 354.87 CAD | In stock |

## Images

- Photo - Primary
- Photo - Primary
- User 1
- Photo - out of package
- User 1

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/wiseco-90-93-polaris-350-trail-boss-639m08150-piston)
> Updated: 2026-07-03