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Pro
Magnum Roller Rocker Arms™
Before we introduced our revolutionary Pro Magnum Rocker
Arms™ there were only two alternatives in competition
rocker arms: Stainless Steel for strength and reliability
or Aluminum for light weight and low cost. With the Pro
Magnum Rockers™ you get the best of both worlds.
Pro
Magnum Rockers™ are made of 8650 chromemoly steel. This
material is some three times stronger than 7075-T6 aluminum
which is used for most aluminum rocker arms. Our engineers
used advanced computer technology (including Finite Element
Analysis) to refine the Pro Magnum Rocker™.
We added strength where it was needed and reduced mass in
low stress areas. The result: Pro Magnum Rocker Arms™
have less weight (5%) at the valve than most aluminum rockers.
This means more RPM and valve train stability.
The
unique design of the Pro Magnum Rocker™ enables us to
use a larger trunion with more needle bearings. This spreads
the load more evenly and the rocker will last longer. Other
features include an integral pushrod seat that insures accuracy
and saves weight, a unique rocker design also provides plenty
of clearance for most high performance valve springs.
Ideally
suited for serious street, bracket racing, super classes,
and circle track racing. You won't find a better street rocker
for the price.
Rebuildable!
Unlike
aluminum rockers, this heavy duty rocker can be rebuilt. We
will disassemble and inspect it, then replace the roller tip,
axle, trunion and bearings to make your rockers like new.
Lifetime
Guarantee!
Pro Magnum Rocker Arms are so strong that we
guarantee the rocker bodies for life against breakage.
| Part
# |
Application |
Rocker
Stud |
Ratio |
| *1301-16C |
Chevrolet V8 265-400 |
3/8" |
1.52 |
| *1301-12B |
Chevrolet
V6 200-262 |
3/8" |
1.52 |
| *1304-16B,C |
Chevrolet V8 265-400 |
7/16" |
1.52 |
| *1304-12B |
Chevrolet V6 200-262 |
7/16" |
1.52 |
| *1302-16C |
Chevrolet
V8 265-400 |
3/8" |
1.6 |
| *1302-12B |
Chevrolet
V6 200-262 |
3/8" |
1.6 |
| *1305-16B,C |
Chevrolet V8 265-400 |
7/16" |
1.6 |
| *1305-12B |
Chevrolet V6 200-262 |
7/16" |
1.6 |
| 1308-8 |
Chevrolet
V8 265-400
Twisted Wedge Head, Intake Valve |
7/16" |
1.52
|
| 1309-8 |
Chevrolet
V8 265-400
Twisted Wedge Head, Intake Valve |
7/16" |
1.6 |
| 1317-16 |
Chevrolet
V8 1988 & later
with self aligning rockers |
3/8" |
1.52
|
| 1317-12 |
Chevrolet V6 262 1988 & later
with self aligning rockers
|
3/8"
|
1.52 |
| 1318-16 |
Chevrolet V8 1988 & later
with self aligning rockers
|
3/8" |
1.6 |
| 1318-12 |
Chevrolet
V6 262 1988 & later
with self aligning rockers |
3/8" |
1.6 |
| *1320-16A |
Chevrolet V8 396-454 |
7/16" |
1.7 |
| 1330-16 |
Ford
V8 Boss 302, 351C, 429-460 |
7/16" |
1.7 |
| 1331-16 |
Ford
V8 289-302-351W |
3/8" |
1.6 |
| 1332-16B |
Ford V8 289-302-351W |
7/16" |
1.6 |
| *1321-16D |
Chrysler V8 B/RB |
shaft |
1.5 |
| 1077-1 |
Shaft
for 1321 rockers |
N/A |
N/A |
| 1077-2 |
Shafts
for 1321 rockers |
N/A |
N/A |
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Call 1-800-999-0853 For Sales
| Characteristics |
|
Rebuildable
Light
Weight
Strong
8620 Chromemoly Steel
5%
Less Weight At Valve Than Most Aluminum Rockers
Large
Trunion & More Needle Bearings To Spread The Load
Integral
Pushrod Seat
Plenty
Of Clearance For Most High Performance Valve Springs
Lifetime
Gaurantee
Applications
Include Serious Street, Bracket Racing, Super Classes,
& Circle Track Racing
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Chart
Footnotes:
A. Will
not replace late model pedestal rockers. See page 285 for
stud conversions.
B. Must use screw-in studs and
guide plates
C. Will not replace late model
rail rocker
D. Requires a ball / ball pushrod
Note:
Rockers available as singles, half-sets and full sets.
*50-state
legal for 1993 and older GM vehicles equipped with 200 c.i.d.
(4.2L) to 454 c.i.d. (7.4L) gasoline engines. C.A.R.B. E.O.
#D-279-4.
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