2 SPI Piston Kits for Polaris 440 XCF TranSport Indy Trail .030 Over Bore 68.5mm
2 SPI Piston Kits for Polaris 440 XCF TranSport Indy Trail .030 Over Bore 68.5mm
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SPI Piston Kit .030 Over Bore 68.5mm for Polaris
This set of two SPI piston kits provides .030 over bore 68.5mm pistons for Polaris 440 XCF, TranSport, and Indy Trail snowmobiles, delivering reliable replacement for worn cylinders.
Overview
SPI piston kits are aftermarket replacements for Polaris 440 engines. These .030 over bore 68.5mm pistons restore compression and power in worn cylinders. The SPI piston kit set includes two pistons for a full engine rebuild.
Built For Performance
- Precision-machined from high-strength aluminum alloy
- .030 over bore increases displacement for added power
- 68.5mm diameter matches stock specifications
- Designed for high-RPM snowmobile engine operation
- Includes piston rings (sold separately if needed)
- Direct fit for Polaris 440 XCF, TranSport, and Indy Trail
Fits These Machines
- for Polaris 440 XCF
- for Polaris TranSport
- for Polaris Indy Trail
On-The-Job Use
- Rebuilding Polaris 440 snowmobile engines
- Replacing worn pistons in high-mileage sleds
- Restoring power for trail and cross-country riding
- Competition and recreational use
Specs At A Glance
| Bore Size | 68.5mm |
| Over Bore | .030 |
| Quantity | 2 pistons |
| Brand | SPI |
| Material | Aluminum Alloy |
Good To Know
Q: Are these pistons complete with rings and wrist pins? A: This kit includes pistons only; rings and pins should be purchased separately if needed.
Q: What is the compression ratio? A: The compression ratio matches factory specs for Polaris 440 engines when used with stock head gasket.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.
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