LSA Dish Top Forged Pistons With Rings 11589-R1-8-STD D11589-R1-8-STD 4.070" bore, 3.622" stroke, 6.098" rod length, -11cc dome volume DIAMOND LS9 LSA 4.070" BORE Piston Specifications:

Piston Specifications:

Block: LSA

Bore: 4.070

Stroke: 3.622

Rod: 6.098

Comp Heigh: 1.331

Weight: N/A

Pin: .945 x 2.500"

CC's: Dish Top -11.0

Comp Ratio With 62cc Head: N/A

Comp Ratio With 70cc Head: 9.5

Comp Ratio With 76cc Head: N/A

Ring Set: 09454070

Piston Features:

3D milling on piston crowns for ready to install finish

Valve pockets designed to work with most aftermarket cylinder heads

Offset pins for quiet operation

Moly skirt coating for friction loss and skirt wear protection

Top ring down dimension: .250"

Ratios figured for .040 head gasket

Premium 1.2mm x 1.2mm x 3.0mm ring package included

Premium 8620 .185W wrist pins included

Valve pocket depth: 0.178" intake and .108" exhaust

2618 material for High HP-NOS-Boost applications