Harley Davidson Dyna [2007-2017]-Forged performance piston kit hub 4.375 "...

Description

The piston kit for Harley Davidson Dyna models from 2007 to 2017 is forged from a high-quality 4032 aluminum silicon alloy with a low expansion and 11% silicon share. By using the latest computer designs, it offers an optimal combination of lightness and strength. Special accumulator between the first and second piston ring significantly improves the seal. In addition, fine grooves in the upper piston area minimize the risk of detonations. The piston surfaces are provided with an anti-friction coating to increase the lifespan and minimize friction.

Content of the kit

• Two forged pistons
• Two sets of molybdenum -coated rings made of ductile iron
• Piston bolts and safety clips
• Assembly oil to facilitate installation

Technical details

Compression relationship: 9.5:1

Drilling diameter: 4 1/8 inches

Hublow length: 4.375 inches

Material: Forged aluminum