FORGED PISTONS
LS Series
Rod Length
Comp Ht.
Wrist Pin Type
Comp Ratio
Cubic Inch
Piston Ring Package
Part No.
Description
Stroke
4.005" Bore - Flat-Top BTPBLS1011-005-8
2 Reliefs, -2.7cc
3.622"
6.125"
1.300"
P/F
10.2 @ 64cc
365
1.5mm, 1.5mm, 3.0mm
ICNIC531CAKTS.005 † Premium Coated Anodized, Boosted Appl. 15°, .030" Offset Pin, 2 Reliefs -4cc 4.010" Bore - Flat-Top ICNIC531CAKTS.010 † Premium Coated Anodized Boosted Appl. 15°, .030" Offset Pin, 2 Reliefs -4cc
4.000"
6.125"
1.115"
P/F
11.3 @ 68.4cc
403
1.2mm, 1.2mm, 3.0mm
4.000"
6.125"
1.115"
P/F
11.3 @ 68.4cc
403
1.2mm, 1.2mm, 3.0mm
4.010" Bore - Dish Top MAH930217710 †
Flat Top, 2 Reliefs, -4cc
3.622"
6.098"
1.340"
P/F
11.1 @ 65cc
366
1.0mm, 1.0mm, 2.0mm
ICNIC529CAKTS.010 † Premium Coated Anodized Boosted Appl. 15° .030" Offset Pin, Dished -15cc ICNIC532CAKTS.010 † Premium Coated Anodized Boosted Appl. 15°, .030" Offset Pin, Dished -20cc ICNIC533CAKTS.010 † Premium Coated Anodized Boosted Appl. 15°, .030" Offset Pin, Dished -8cc
4.000"
6.125"
1.115"
P/F
10.0 @ 68.4cc
403
1.2mm, 1.2mm, 3.0mm
4.000"
6.125"
1.115"
P/F
9.6 @ 68.4cc
403
1.2mm, 1.2mm, 3.0mm
4.000"
6.125"
1.115"
P/F
10.8 @ 68.4cc
403
1.2mm, 1.2mm, 3.0mm
4.020" Bore - Flat-Top ICNIC551C.020
Premium, 2 Reliefs, -3cc Premium, 2 Reliefs, -4cc
3.622" 4.000" 4.000"
6.125" 6.125" 6.125"
1.304" 1.115" 1.115"
P/F P/F P/F
10.3 @68.4cc 11.3 @ 68.4cc
365 403
1.2mm, 1.2mm, 3.0mm 1.2mm, 1.2mm, 3.0mm
ICNIC552C.020 ICNIC9986C.020
FHR Series, 2 Reliefs, -2.9cc
11.5 @ 64.5cc 405/415 1.5mm, 1.5mm, 3.0mm
FHR Series, R & L Bank Pistons, .030" Offset Pin, 2 Reliefs, -3.3cc
ICNIC9991C.020
4.000"
6.125"
1.115"
P/F
11.4 @ 68.4cc
403
1.5mm, 1.5mm, 3.0mm
4.020" Bore - Dish-Top ICNIC553C.020 4.030" Bore - Dish-Top BTPBLS1118-030-8
Premium, Dished, -12.5cc
4.000"
6.125"
1.304"
P/F
9.9 @ 68.4cc
365
1.2mm, 1.2mm, 3.0mm
Dished, 2 Reliefs, -13cc
3.622" 4.000"
6.125" 6.125"
1.300" 1.115"
P/F P/F
9.5 @ 64cc 10.7 @ 67cc
370 408
1.5mm, 1.5mm, 3.0mm 1.2mm, 1.2mm, 3.0mm
Dished, 2 Reliefs, -8cc LS1/LS2/LS3/LS6/L92
WISK394X3
4.030" Bore - Dish-Top BTPBLS1118-030-8
Dished, 2 Reliefs, -13cc
3.622" 4.000"
6.125" 6.125"
1.300" 1.115"
P/F P/F
9.5 @ 64cc 10.7 @ 67cc
370 408
1.5mm, 1.5mm, 3.0mm 1.2mm, 1.2mm, 3.0mm
Dished, 2 Reliefs, -8cc LS1/LS2/LS3/LS6/L92
WISK394X3
4.030" Bore - Flat-Top DSS1820BSX-4030
SX / 2 Reliefs, -5cc, LS2 SX / 2 Reliefs, -5cc, LS2
3.622" 3.622" 3.622" 3.622"
6.125" 6.100" 6.125" 6.098" 6.098" 6.125" 6.125" 6.125" 6.125" 6.125"
1.305" 1.330" 1.304" 1.340"
P/F P/F P/F P/F
10.57 @ 64cc 10.57 @ 64cc 10.3 @68.4cc 10.1 @ 64cc
364 364 365 370
1.5mm, 1.5mm, 3.0mm 1.5mm, 1.5mm, 3.0mm 1.2mm, 1.2mm, 3.0mm 1.5mm, 1.5mm, 3.0mm
DSS1830BSX-4030 ICNIC551C.030 MAH930217730 †
Premium, 2 Reliefs, -3cc 2 Reliefs, -4cc, LS1/LS2/LS6
NA/Boost/Nitrous, 2 Reliefs, -3.2cc, LS1/LS2/LS6/L92 .927" Pin Dia. Professional Series, 2 Reliefs, -11cc
WISK398X3 †
3.622"
1.304"
P/F
10.7 @ 65cc 365/370 1.2mm, 1.2mm, 3.0mm
WISK444X3
3.622" 4.000" 4.000" 4.000" 4.000"
1.300" 1.115" 1.110" 1.115"
P/F P/F P/F P/F
9.5 @ 68cc
365 402 408 403
1.2mm, 1.2mm, 3.0mm 1.5mm, 1.5mm, 3.0mm 1.5mm, 1.5mm, 3.0mm 1.2mm, 1.2mm, 3.0mm
DSS1920BSX-4030 BTPBLS1111-030-8 ICNIC552C.030 ICNIC9986C.030
SX / 2 Reliefs, -5cc, LS2
11.85 @ 64cc 11.6 @ 64cc 11.3 @ 68.4cc
2 Reliefs, -2.7cc
Premium, 2 Reliefs, -4cc FHR Series, 2 Reliefs, -2.9cc
6.125" 28.3 mm P/F
11.5 @ 64.5cc 405/415 1.5mm, 1.5mm, 3.0mm
ICNIC531CAKTS.030 † Premium Coated Anodized Boosted Appl. 15°, .030" Offset Pin, 2 Reliefs -4cc
4.000"
6.125"
1.115"
P/F
11.3 @ 68.4cc
403
1.2mm, 1.2mm, 3.0mm
FHR Series, R & L Bank Pistons, .030" Offset Pin, 2 Reliefs, -3.3cc
ICNIC9991C.030
4.000"
6.125"
1.115"
P/F
11.4 @ 68.4cc
403
1.5mm, 1.5mm, 3.0mm
4.030" Bore - Dish-Top ICNIC529CAKTS.030 † Premium Coated Anodized Boosted Appl. 15°,. .030" Offset Pin, Dished -15cc ICNIC532CAKTS.030 † Premium Coated Anodized Boosted Appl. 15°, .030" Offset Pin, Dished -20cc ICNIC533CAKTS.030 † Premium Coated Anodized Boosted Appl. 15°, .030" Offset Pin, Dished -8cc
4.000"
6.125"
1.115"
P/F
10.0 @ 68.4cc
403
1.2mm, 1.2mm, 3.0mm
4.000"
6.125"
1.115"
P/F
9.6 @ 68.4cc
403
1.2mm, 1.2mm, 3.0mm
4.000"
6.125"
1.115"
P/F
10.8 @ 68.5cc
403
1.2mm, 1.2mm, 3.0mm
ICNIC553C.030
Premium, Dished, -12.5cc
4.000"
6.125"
1.304"
P/F
9.9 @ 68.4cc
365
1.2mm, 1.2mm, 3.0mm
4.065" Bore - Flat-Top MAH930223065 †
2 Reliefs, -4cc, LS3/L92
3.622"
6.098"
1.340"
P/F
10.1 @ 70cc
376
1.5mm, 1.5mm, 3.0mm
† Piston sets include piston rings. P/F - PRESS-FIT / FLOATING
157 2021-22 ENGINE BUILDER CATALOG
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