LS 4.135″ PISTON -5cc 4.000 ST6.125 ROD 1.115″ CH ASYMMETRIC

Description

GM LS Flat Top Our brand
new Asymmetrical FSR (Forged
Side Relief) forging design
allows for the use of the most
popular stroke and rod
combinations while eliminating
reluctor wheel clearance
problems. Asymmetrical forging
design maintains a larger
skirt on the heavily stressed
major thrust side, while
reducing friction with a
smaller skirt on the minor
thrust side. The result is a
high strength, lightweight
piston that significantly
reduces friction in your
engine. Lightweight and
extremely durable, these
pistons are machined for
1.2mm, 1.5mm, 3.0mm
rings.

Includes:

• .927 x
  2.250 straight wall carbon
  steel wrist pin
• Wire
  locks

Specifications:

• Part #:
  J311987
• Bore:
  4.135″
• Oversize: .010″
  LS7
• Stroke:
  4.000
• Rod Length:
  6.125″
• Compression
  Height:
  1.115″
• Compression
  Ratio with 64cc chamber
  volume:
  12.2
• Compression Ratio
  with 68cc chamber volume:
  11.7
• Compression Ratio
  with 70cc chamber volume:
  11.4
• Dome Volume:
  -5cc
• Gram
  Weight:
• Footnote: For
  ged Side
  Relief
• Reconmended
  Ring Set:
  JG31F8-4135-2

With
over 60 years of experience,
JE Pistons is the leader in
high performance forged
pistons. We’ve built a
reputation that the
competition can only follow.
JE has a history of
manufacturing the highest
quality pistons and components
that professional engine
builders, race teams, and high
performance enthusiasts trust
and rely on.

The top
engine builders in NASCAR,
ALMS, NHRA, AMA Supercross and
others choose JE Pistons over
any other brand. For over 60
years, JE’s position at the
forefront of performance
piston manufacturing has been
a result of continuous
research and development of
unique materials, piston
designs and technologies.
Utilising State-Of-The-Art CNC
machines for manufacturing
along with purpose-designed
forgings, JE is able to
maintain exacting
specifications on each and
every piston and hold
tolerances to millionths of an
inch. Also available from JE
is industry-leading processes
like Ultra Crown, a Digital
Three Dimensional piston crown
machining process and Finite
Element Analysis (FEA). FEA is
a computer processwhereby
stress and fatigue are tested
on a computer model before it
goes into production. JE is
the only performance piston
manufacturer to earn the
QS-9000 quality standard which
confirms that JE provides
customers the highest
standards in quality control.
In addition, we also have
State-Of-The-Art inspection
equipment and testing
equipment which enables us to
constantly bring you, the
customer, the very latest in
piston design
configurations.