Dome/Dish requires no deburring or preparation. 2618 T6 high tensile forged aluminum. JE designs are specifically engineered for extreme applications up to, and including, professional competition. In this environment, the higher compression ratios, highest boost or heavy nitrous usage necessitate the higher tensile strength 2618 aluminum alloy. Dome and dishes feature smooth flowing radii for excellent flame travel. 1.2 x 1.2 x 2.5mm ring widths..905 x 2.500 straight wall carbon steel wrist pin provided. Pin fitting and Tru Arc locks included. Rings Now Included

SUBARU EJ257 BLOCK WITH EJ20 HEAD

Part # Bore Oversize Stroke (mm) Rod (mm) C/D (mm) Head CC's C/R With .040 Dome CC's Gram Footnote Skirt Included Ring Set# 280089 99.5 STD 79 130.5 30.7 48.0 8.5:1 -25.4 417 T R JC3104-3917 280090 100.0 0.50 79 130.5 30.7 48.0 8.5:1 -26.1 423 T R JC4404-3938