7/16" thick and 2-3/4" center to center mounting holes

The skirt dimension across the widest part of the piston measures 3

Replacement double lip fork seals

is not included must be ordered separately or re-used

Screamin' Eagle ST Performance High Compress Spark Plug Belt Drive Kits 7/16" thick and 2-3/4" centerFits '84 '99 Evolution 1340 equipped models, '75 '81 Shovelhead 74 and 80CI, and '83 '84 XR1000 models Feature Ribbed Core Technology (RCT) that provides resistance to fouling, and are designed with Original Equipment style noise suppression to prevent electrical interference with radios and CB communication equipment Works great in racing applications where rich air fuel conditions are required Designed for high performance applications involving