 THE WORLD’S BEST
RACING PUSHRODS - MADE
BY AMERICANS IN THE USA!
Features include:
• Superior 4130 Chromoly
seamless tubing for added
strength
• Heat
treatment for outstanding
wear properties
• Swedged ends for
excellent rocker arm cup
clearance
Important Instructions &
Suggestions
It is very important to
determine proper pushrod
length. Improper pushrod
length can
cause a number of problems
including: excessive valve
guide wearlessened
valve
lift
valve stem side
thrustcoil
bindimproper valve to
piston
clearancerocker arm
to retainer interference (in
some cases lash caps can be
used to help correct rocker
arm
to retainer clearance
problems)
Check the radius of the lifter
receiver cup and rocker arm
cup/ball before ordering to
help prevent mistakes.
Improper
ordering may result in parts
failure. Watch for variations
from stock radius in
aftermarket lifters.
Make sure significant oil
volume reaches the rocker arm
end of the pushrod to help
prevent galling due to
excessive
heat generation and lack of
lubrication. To prevent
interrupted
oil flow to the pushrod, it is
very common and almost
always
necessary to modify the lifter
body so oil flows through it
no matter where it’s
positioned in the lifter bore
. Oil restriction in the
engine block is not normally
recommended.
Note: When using Manley
pushrods, adjustments to
valve/cam
timing, valve to piston
clearance and fuel curve may
be
required..
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