Page 463 - 2021-22 Auto Performance_Circle Track
P. 463
Low-friction pistons with double-forced pin
cylinder heads. Requires 1/16" top, 1/16" second, and 3/16" oil rings. The pistons include .927" x 2.500" (118 grams) heavy-du- ty wrist pins. Sold in sets of eight, with double spiral locks.
Race Series Piston Rings
A full selection of premium Pro Seal
piston rings are listed by bore size. Top
compression rings are barrel-faced ductile iron with a plasma moly coating. Second rings are taper-face cast iron with a phos- phate coating. Standard or low-tension oil rings are chrome-plat-
Rod Part No. Bore Stroke Length
JEP194339 4.155" 4.000" 6.000"
Comp. Ratio
Dome Volume
Part No.
Bore
Size Type
Top 2nd Oil Ring Ring Ring
350 Pistons
JEP181916
4.030"
3.500"
6.000"
10.3:1
-5 cc
400 Pistons
JEP242886
4.125"
4.000"
6.000"
12.2:1
-5cc
JEPJ100F8-4030-5
4.030"
Plasma-Moly
1/16"
1/16"
3/16"
JEPJ10008-4030-5*
4.030"
Plasma-Moly
1/16"
1/16"
3/16"
JEPJ100F8-4040-5
4.040"
Plasma-Moly
1/16"
1/16"
3/16"
JEPJ10008-4040-5*
4.040"
Plasma-Moly
1/16"
1/16"
3/16"
JEPJ100F8-4080-5
4.080"
Plasma-Moly
1/16"
1/16"
3/16"
JEPJ100F8-4125-5
4.125"
Plasma-Moly
1/16"
1/16"
3/16"
JEPJ10008-4125-5*
4.125"
Plasma-Moly
1/16"
1/16"
3/16"
JEPJ10008-4130-5
4.130"
Plasma-Moly
1/16"
1/16"
3/16"
JEPJ10008-4145-5*
4.145"
Plasma-Moly
1/16"
1/16"
3/16"
JEPJ100F8-4155-5
4.155"
Plasma-Moly
1/16"
1/16"
3/16"
JEPJ10008-4155-5*
4.155"
Plasma-Moly
1/16"
1/16"
3/16"
JEPS100S8-4155-5
4.155”
Plasma-Moly
1/16"
1/16"
3/16"
JEPJ10008-4165-5
4.165"
Plasma-Moly
1/16"
1/16"
3/16"
12.3:1 -5cc
JEP194340
4.165"
4.000"
6.000"
12.3:1
-4.3cc
Notes: Compression ratios are based on a 64cc combustion chamber. The 350 pistons listed above fit both 3.480" and 3.500" strokes.
Lightweight, lateral gas-ported pistons are
engineered for circle track applications with
up to 650 horsepower. Pistons use an ag-
gressive, raised ring competition-only design
for maximum performance. Requires .043" top, .043" second, and 3.0mm oil rings. Sold in sets of eight, complete with .927" x 2.350" (111 grams) wrist pins, and wire locks.
* Low-tension oil rings
Part No.
Bore Stroke
Ratio
Volume
Rod Length
Comp. Dome
NEW!
Premium Race Series ring sets combine plasma-moly inlaid duc- tile iron top rings with taper-faced reverse torsional second rings and low-tension oil rings. All sets
Pro Seal Premium Race Series Piston Rings
JEP258027
4.045"
3.500"
5.700"
10.4:1
-5.0cc
JEP258028
4.030"
3.500"
6.000"
10.4:1
-5.0cc
JEP258029
4.035"
3.500"
6.000"
10.4:1
-5.0cc
JEP258030
4.040"
3.500"
6.000"
10.4:1
-5.0cc
JEP258031
4.045"
3.500"
6.000"
10.5:1
-5.0cc
Part No.
BoreSize Type
Top 2nd Oil Ring Ring Ring
JEPJG3108-4000-7
4.000"
Plasma-Moly
1.2mm
1.5mm
3.0mm
JEPJ71408-4030-5
4.030"
Plasma-Moly
.043"
.043"
3.0mm
JEPJ71408-4040-5
4.040"
Plasma-Moly
.043"
.043"
3.0mm
JEPJ71408-4060-5
4.060"
Plasma-Moly
.043"
.043"
3.0mm
JEPJG31F8-4060-0
4.060"
Plasma-Moly
1.2mm
1.5mm
3.0mm
JEPJG31F8-4070-0
4.070"
Plasma-Moly
1.2mm
1.5mm
3.0mm
JEPJG31F8-4075-5
4.075"
Plasma-Moly
1.2mm
1.5mm
3.0mm
JEPJ71408-4125-5
4.125"
Plasma-Moly
.043"
.043"
3.0mm
Note: Compression ratios are based on a 64cc combustion chamber. The 350 pistons listed above fit both 3.480" and 3.500" strokes.
Ideal for Dirt Late Models, small block
Chevy 400 pistons utilize deep valve reliefs to
accommodate increased valve lift and smaller
combustion chambers. Pistons accept 1.2, 1.5, and 3.0mm rings for reduced friction, and lateral gas ports are used to increase combustion sealing. Sold in sets of eight with .927" x 2.750" (130 grams) wrist pins and double spiral locks.
Pro Seal Carbon Steel Nitride Piston Rings
Part No.
JEP281793*
JEP281800*
* Compression ratios are based on a 45cc combustion chamber.
JP Performance billet timing gear sets
have induction-hardened crank sprock-
ets for increased life and durability.
Most sets have reverse oiler grooves to
lubricate the front cam journal face in
engines without thrust plates. Timing sets are also available -.005" and -.010" for engines that have been align bored (require reduced center distances).
Bore
4.125"
Stroke
3.800"
Length Ratio
Volume
Rod Comp. Dome
NEW!
Top-of-the line piston rings sets include .043” carbon steel nitride top rings, .043” ductile iron phosphate second rings, and 3mm carbon steel low-tension oil rings.
6.000" 15.1 -4.5
4.140"
3.800"
5.850" 15.2 -4.5
Bore Top Size Type Ring 4.145” Carbon Steel .043”
4.165” Carbon Steel .043”
Standard -.005" Part No. Part No.
2nd Oil Ring Ring .043” 3mm .043” 3mm
-.010" Part No.
461
Part No.
JEPJG7708-4145-5 JEPJG7708-4165-5
Description
SB Chevy 265-400, Reverse Oiler
JPP5981
—
JPP5981-LB10
SB Chevy 265-400, Torrington Bearing
JPP5981T
JPP5981T-LB5
JPP5981T-LB10
SB Chevy 265-400, BB Chevy Crank Snout, Torrington Bearing
JPP5630T
—
—
SB Chevy “Rocket Block”, Torrington Bearing
JPP5616T
—
—
SB Chevy Gen. III 5.7L LS1, Torrington Bearing
JPP5615T
JPP5615T-LB5
—
SB Chevy Gen. III 6.0L LS2, Torrington Bearing
JPP5623T
—
—
SB Ford 302-351W, Non-EFI, Reverse Oiler
JPP5982
JPP5982-LB5
—
SB Chrysler 273-360
JPP5985
JPP5985-LB5
—
TRACK
CIRCLE 2021-22
