SB Chevy 350/400 Extreme Duty 23° Inverted Dome Pistons For nitrous or forced induction, inverted dome pistons have .310" pocket depths and accept 1/16" top, 1/16" second and 3/16" oil rings. Sets of eight include wrist pins and double spiral locks.
BB Chevy Open Chamber Dome GP Pistons
The top choice for drag racing, big block Chevy pistons are engineered for use with open chamber cylinder heads, use a high compression dome design and feature verti-
cal gas ports for maximized combustion sealing. Pistons accept .043" top, .043" second and 3mm oil rings. Sets of eight include wrist pins and double spiro locks.
Rod Length
Comp. Ratio
Dome Volume
Part No.
Bore
Stroke
350 Pistons JEP131636 400 Pistons JEP170818
Rod Length 6.535" 6.535" 6.535"
Comp. Ratio 14.6:1 14.8:1 14.9:1
Dome Volume +46cc +46cc +46cc
4.030"
3.480"
5.700"
8.7:1
-22cc
Part No.
Bore
Stroke 4.250" 4.250" 4.250"
JEP243330 JEP243331 JEP243332
4.560" 4.600" 4.610"
4.155" -28cc Notes: Compression ratios are based on a 64cc combustion chamber. The 350 pistons listed above fit both 3.480" and 3.500" strokes. 3.750" 6.000" 9.2:1
BB Chevy Open Chamber Dome Pistons
SB Chevy 350/400 23° Dome Pistons High compression pistons are compatible with most stock, aftermarket, and angle milled cylinder heads. Valve reliefs accommodate oversized valves and high lift cams. Requires 1/16" top, 1/16" second and 3/16" oil rings. Sold in sets of eight with .927" x 2.750" (130 grams) wrist pins and double spiral locks.
Ideal for drag racing, open chamber dome pistons accept 1/16" top, 1/16" second and 3/16" oil rings. Not compatible with Edelbrock #6040, #6045 or #6055 cylinder heads.
Rod Length 6.385" 6.385" 6.385" 6.385"
Comp. Ratio 13.0:1 14.3:1 14.5:1 14.6:1
Dome Volume
Part No.
Bore
Stroke 4.250" 4.250" 4.250" 4.250"
JEP258243 JEP258238 JEP258239 JEP258240
4.310" 4.500" 4.530" 4.560"
43cc 45cc 45cc
Rod Length 6.000" 6.000" 6.000" 6.000" 6.000” 6.000" 6.000" 6.000" 6.000" 6.000" 6.000" 6.000" 6.000" 6.000" 6.000" 6.000" 6.000" 6.000" 6.000" 6.000"
Comp. Ratio 12.8:1 13.2:1 13.2:1 13.4:1 13.7:1 13.8:1 13.1:1 14.1:1 13.5:1 14.5:1 13.5:1 13.8:1 13.7:1 13.2:1 14.1:1 13.5:1 13.3:1 14.1:1 13.5:1 14.8:1
Dome Volume +13cc +13cc +13cc +9.5cc +11cc +13cc +5.6cc +10.8cc +5.6cc +10.8cc
Part No.
Bore
Stroke
45cc Notes: Compression ratios are based on a 118cc combustion chamber.
350 Pistons JEP182012 4.030" JEP182014 4.040" JEP182015 4.060" JEP182005 4.030" JEP182006 4.040” 400 Pistons JEP182067 4.125" JEP182053 4.125" JEP182058 4.125" JEP182033 4.125" JEP182038 4.125" JEP182024 4.125" JEP182069 4.155" JEP182061 4.155" JEP182036 4.155" JEP182041 4.155" JEP182027 4.155" JEP182037 4.165" JEP182042 4.165" JEP182028 4.165" JEP207513 4.185"
3.500" 3.500" 3.500" 3.750" 3.750” 3.500" 3.750" 3.750" 3.875" 3.875" 4.000" 3.500" 3.750" 3.875" 3.875" 4.000" 3.875" 3.875" 4.000" 4.000"
Spiro And Wire Locks Sold each. Part No. Description
Dia.
Thickness
Material
JEP927-042-CS JEP927-073-AS
Spiro Lock Spiro Lock
.927" .927" .927" .990"
.042" .073" .073" .042"
Carbon Steel
Alloy
JEP927-073-MW Wire Lock
Chrome Silicon Carbon Steel
JEP990-042-CS
Spiro Lock
+3cc +13cc +8cc +3cc +8cc +3cc +3cc +8cc +3cc
Pro Seal Premium Race Series Piston Rings Top compression rings are barrel shaped ductile iron with a plasma
moly coating. Second rings are taper faced cast iron with a phosphate coating. Oil rings are standard tension, chrome plated carbon steel. All sets are .005" oversize, for a custom file fitting. Part No. Bore Size Type Top Ring 2nd Ring Oil Ring JEPJ100F8-4030-5 4.030" Moly 1/16" 1/16" 3/16" JEPJ10008-4030-5* 4.030" Moly 1/16" 1/16" 3/16" JEPJG31F8-4030-2 4.030" Carbon Steel 1.2mm 1.5mm 3mm JEPS100S8-4030-5 4.030" Moly 1/16" 1/16" 3/16" JEPJ10008-4040-5* 4.040" Moly 1/16" 1/16" 3/16" JEPJ100F8-4040-5 4.040" Moly 1/16" 1/16" 3/16" JEPJ10008-4060-5* 4.060" Moly 1/16" 1/16" 3/16" JEPJ10008-4125-5* 4.125" Moly 1/16" 1/16" 3/16" JEPJ75008-4125-5 4.125" Carbon Steel 1.2mm 1.5mm 3mm JEPJ100F8-4125-5 4.125" Moly 1/16" 1/16" 3/16" JEPJ10008-4145-5* 4.145" Moly 1/16" 1/16" 3/16" JEPJ10008-4155-5* 4.155" Moly 1/16" 1/16" 3/16" JEPJ100F8-4155-5 4.155" Moly 1/16" 1/16" 3/16" JEPJ10008-4165-5* 4.165" Moly 1/16" 1/16" 3/16" JEPJ100F8-4185-5 4.185" Moly 1/16" 1/16" 3/16" JEPJ100F8-4310-5 4.310" Moly 1/16" 1/16" 3/16" JEPS100S8-4310-5 4.310” Moly 1/16” 1/16” 3/16” JEPJ100F8-4320-5 4.320" Moly 1/16" 1/16" 3/16" JEPJ10008-4350-5* 4.350" Moly 1/16" 1/16" 3/16" JEPJ10008-4500-5* 4.500" Moly 1/16" 1/16" 3/16" JEPJ100F8-4500-5 4.500" Moly 1/16" 1/16" 3/16" JEPJG8608-4600-5 4.600” Moly .043” 1/16” 3/16” * Low tension ring set.
+8cc Notes: Compression ratios are based on a 64cc combustion chamber. All of the 350 pistons listed above, with the exception of JEP182005, fit both 3.480" and 3.500" strokes.
BB Chevy Inverted Dome Pistons Pistons, fully compatible with forced induc- tion or nitrous oxide, feature an inverted dome design for maximum efficiency and horse- power. Fully compatible with open and closed chamber cylinder heads, pistons accept 1/16" top, 1/16" second and 3/16" oil rings.
Rod Length
Comp. Ratio
Dome Volume
Part No.
Bore Stroke
JEP257956 JEP257942 JEP257945
4.500" 4.000" 6.135" 4.500" 4.250" 6.385" 4.600" 4.250" 6.385"
8.4:1 -11.5cc
8.4:1 8.7:1
-20cc
-20cc Note: Compression ratios are based on a 118cc combustion chamber.
373
Made with FlippingBook flipbook maker