Page 23 - Diamond Pistons
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Oldsmobile 455
STREET/STRIP DISH SERIES
• 3D milling on piston crowns for ready to install  nish
• Valve pockets designed to work with OEM & aftermarket cylinder heads
• Top ring down dimension: .200”
• Ratios  gured for .040 head gasket @ 10.625 Deck
• Standard 1/16 x 1/16 x 3/16 ring package
• Premium 8620 .155W wrist pins included
• Valve pocket depth: 0.075” intake and sym exhaust
• Will work with up to a intake valve size of 2.150”
• Made from 4032 alloy and designed for applications up to 650hp
455 Block: 4.125 Std Bore 4.250 Std Stroke
COMPRESSION RATIO
Bore
Stroke
Rod
C.D.
Weight
Pin
CC's
77cc
10.5
Ring Set
Part #
4.125
4.250
6.735
1.750
550
.984 x 2.500
-8.5cc
10.4
09024125
61202
4.155
4.250
6.735
1.750
560
.984 x 2.500
-8.5cc
09024155
61203
4.165
4.250
6.735
1.750
565
.984 x 2.500
-8.5cc
10.5
09024165
61204
4.155
4.500
7.100
1.260
465
.990 x 2.500
-15.0cc
10.5
09024155
61205
4.165
4.500
7.100
1.260
470
.990 x 2.500
-15.0cc
10.6
09024165
61206
All items in red are non-stocking parts, made-to-order as necessary
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
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COMPETITION SERIES


































































































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