Attributes

Key Value
Bore (in.)4.125 in.
Bore (mm)104.775mm
BrandKB
Compression Height (in.)1.561 in.
Engine Stroke TypeStock/De-Stroked
File FitNo
GaplessNo
Manufacturer's Part.KB172KTM.STD
NotesCan also be used on 377.
Oil Ring MaterialStainless steel
Oil Ring TensionStandard
Oil Ring Thickness3/16 in.
Part TypePistons
Pin Diameter (in.)0.927 in.
Piston Head Volume (cc)+7.00cc
Piston MaterialHypereutectic aluminum
Piston Ring Thickness5/64 in. x 5/64 in. x 3.
Piston Rings IncludedYes
Piston StyleFlat top, with two valv.
Product LineKB Performance Hyper Pi.
QuantitySold as a kit.
Rod Length5.565 in.
Second Ring Facing Mate.Cast iron
Second Ring MaterialIron
Second Ring Thickness5/64 in.
Stroke3.750 in.
Summit Racing Part Numb.UEM-KB172KTM-STD
Top Ring Facing MaterialMoly
Top Ring MaterialIron
Top Ring Thickness5/64 in.
UPC800745163295
Wrist Pin IncludedYes
Wrist Pin Retainers Inc.Yes
Wrist Pin StylePress-fit or floating
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