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Screamin' Eagle High Compression Pistons – 135 CI

Part Number: 21900164A
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High-compression pistons 4.310" bore.

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Screamin' Eagle High Compression Pistons – 135 CI
High-compression pistons 4.310" bore.
Forged flat-top pistons
Piston design and rings engineered to withstand increased combustion forces for outstanding durability
Updated ring package with 1mm compression and scraper rings
Gas-ported to assist with ring sealing while allowing for low-tension and reduced friction

Replacement pistons for '21-later Milwaukee-Eight Touring models equipped with 135CI Stage IV Performance Crate engine.

Dealer Install Recommended: Yes
ECM Calibration Required: Yes
Sold In Units: Pair
In the Box: Pistons, Rings, Clips and installation instructions
WARRANTY: 1 year limited warranty – Go to www.h-d.com/warranty for full details
Certification: 49-State U.S. EPA compliant
Harley-Davidson® motorcycles modified with some Screamin’ Eagle® Performance products must not be used on public roads and, in some cases, may be restricted to closed-course competition. These performance parts are 49-state U.S. EPA compliant but are NOT compliant for sale or use in California on pollution-controlled motor vehicles. California guidelines on tampering can also lead to substantial fines and penalties. Screamin’ Eagle® Performance products are intended for the experienced rider only.
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