131794 - 80  Evolution Piston Kit .020

131794 - 80 Evolution Piston Kit .020

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Keith Black piston set is .020 oversize and is for 3.498 bore. Piston set has a compression of 9.6:1 and includes rings.
The Keith Black 390 hypereutectic alloy is cast in a permanent steel mold which makes it possible to build a light weight piston that makes more power and uses less fuel and lasts longer. Pistons are .020 oversize for a 3.498 bore and has a 9.5:1 compression ratio. The low heat transfer of the alloy keeps the skirts cool so piston expansion is minimal. The combination of a low heat transfer piston alloy and high compression ring placement increases power and economy. The high ring placement alone reduces detoantion and increases the top ring temperature. **Note:Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings.

FLST 1986-1998
FLT 1984-1998
FXD 1991-1998
FXR 1984-1994
FXST 1984-1998

Country Of Origin: MEXICO
Suggested Items: 11-1365 - 80 Shovelhead Piston Ring Set .020

Accessory Items:
16-0622 - Ring-O-Matic Ring Compressor Tool Kit
60-0167 - Cylinder Boring Service
16-0075 - Wrist Pin Ring Tool