Page 127 - Diamond Pistons

Subaru
2004-UP EJ257 WRX/STI SERIES
• 3D milling on piston crowns for ready to install nish
• Offset pins for quiet operation
• Moly skirt coating for friction loss and skirt wear protection
• Ratios gured for 101mm x .0236 head gasket
• Top ring down dimension: .250”(1.208cd) - .240” (1.129cd)
• Premium 1.2mm x 1.2mm x 2.0mm ring package included
• Premium 8620 .180W wrist pins chamfered for roundwire locks included
• Oversized valve pockets - for larger than stock valve sizes
• Valve pocket depth: 0.220” intake and .220” exhaust
• 2618 material for High HP/Boost applications
Stock Bore 99.5mm (3.9173) Stock Stroke 79mm (3.110)
COMPRESSION RATIO
Bore
Stroke
Rod
C.D.
Weight
Pin
CC's
56cc
Ring Set
Part #
99.5mm
79.0mm
5.137
1.208
call
.905 x 2.500
-22.0cc
8.1
09513917
36011
99.75mm
79.0mm
5.137
1.208
call
.905 x 2.500
-22.0cc
8.1
09513927
36012
100.0mm
79.0mm
5.137
1.208
call
.905 x 2.500
-22.0cc
8.2
09513937
36013
100.5mm
79.0mm
5.137
1.208
call
.905 x 2.500
-22.0cc
8.3
09513957
36014
99.5mm
79.0mm
5.137
1.208
call
.905 x 2.500
-12.0cc
9.0
09513917
36015
99.75mm
79.0mm
5.137
5.137
1.208
call
.905 x 2.500
.905 x 2.500
-12.0cc
9.1
9.9
09513927
09513917
36016
100.0mm
79.0mm
5.137
1.208
call
.905 x 2.500
-12.0cc
9.1
09513937
36017
100.5mm
79.0mm
5.137
1.208
call
.905 x 2.500
-12.0cc
9.2
09513957
36018
99.5mm
79.0mm
1.208
call
-4.5cc
36019
99.75mm
79.0mm
5.137
1.208
call
.905 x 2.500
-4.5cc
10.0
09513927
36020
100.0mm
79.0mm
5.137
1.208
call
.905 x 2.500
-4.5cc
10.0
09513937
36021
100.5mm
79.0mm
5.137
1.208
call
.905 x 2.500
-4.5cc
10.1
09513957
36022
Stock Bore 99.5mm (3.9173) Stock Stroke 79mm (3.110)
COMPRESSION RATIO
Bore
Stroke
Rod
C.D.
Weight
Pin
CC's
56cc
Ring Set
Part #
99.5mm
83.0mm
5.137
1.129
call
.905 x 2.500
-26.0cc
8.1
09513917
36023
99.75mm
83.0mm
5.137
1.129
call
.905 x 2.500
-26.0cc
8.2
09513927
36024
100.0mm
83.0mm
5.137
1.129
call
.905 x 2.500
-26.0cc
8.2
09513937
36025
100.5mm
83.0mm
5.137
1.129
call
.905 x 2.500
-26.0cc
8.3
09513957
36026
99.5mm
83.0mm
5.137
1.129
call
.905 x 2.500
-16.0cc
9.0
09513917
36027
99.75mm
83.0mm
5.137
1.129
call
.905 x 2.500
-16.0cc
9.1
9.9
09513927
36028
100.0mm
83.0mm
5.137
1.129
call
.905 x 2.500
-16.0cc
9.1
09513937
36029
100.5mm
83.0mm
5.137
1.129
call
.905 x 2.500
-16.0cc
9.2
09513957
36030
99.5mm
83.0mm
5.137
1.129
call
.905 x 2.500
-8.0cc
09513917
36031
99.75mm
83.0mm
5.137
1.129
call
.905 x 2.500
-8.0cc
10.0
09513927
36032
100.0mm
83.0mm
5.137
1.129
call
.905 x 2.500
-8.0cc
10.0
09513937
36033
100.5mm
83.0mm
5.137
1.129
call
.905 x 2.500
-8.0cc
10.1
09513957
36034
Optional H-13, M2 and TP-1 wrist pins available as a upgrade to any piston part number - Contact Diamond Pistons for tech assistance
DiamondRacing.net Tech support 586.792.6620
125
SPORT COMPACT SERIES