| 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.
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 |
| Part
# |
Application |
Rocker
Stud |
Ratio |
| *
1301-16
C |
Chevrolet V8 265-400 |
3/8" |
1.52 |
| *
1301-12
B |
Chevrolet
V6 200-262 |
3/8" |
1.52 |
| *
1304-16
B,C |
Chevrolet V8 265-400 |
7/16" |
1.52 |
| *
1304-12
B |
Chevrolet V6 200-262 |
7/16" |
1.52 |
| *
1302-16
C |
Chevrolet
V8 265-400 |
3/8" |
1.6 |
| *
1302-12
B |
Chevrolet
V6 200-262 |
3/8" |
1.6 |
| *
1305-16
B,C |
Chevrolet V8 265-400 |
7/16" |
1.6 |
| *
1305-12
B |
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 |
| *
1320-16
A |
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 |
|
1332-16
B |
Ford V8 289-302-351W |
7/16" |
1.6 |
| *
1321-16
D |
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 |
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 |
