Machined from 8650 steel with a billet pushrod seat insert, these Ultra Pro Magnum XD rockers can handle up to 1,000 lbs of spring pressure. These 1826 rockers feature a 1.6 ratio for use with 7/16" stud Chevrolet 396-454 Big Block.
The Ultra Pro Magnumâ„¢ XD Rocker Arms are engineered from durable 8650 Steel that outlasts and outperforms other inferior knock-off and import Rockers. A unique machined billet Pushrod seat insert offers exceptional durability. These new Stud mount Rockers are fully rebuildable and use precision-sorted needle bearings and hardened Roller tips to better distribute the load and reduce wear for a longer service life. In addition, they work with most diameter springs and retainers. The XD design utilizes advanced FEA and CAD design and development to improve strength, stiffness and MOI optimization for endurance, drag and circle track Applications.
Information:
Available individually under
Application Summary:
| Year |
Make/Model |
| 1963 |
Chevrolet Bel Air |
| 1965-1975 |
Chevrolet Bel Air |
| 1963 |
Chevrolet Biscayne |
| 1965-1972 |
Chevrolet Biscayne |
| 1972 |
Chevrolet Brookwood |
| 1967-1972 |
Chevrolet Camaro |
| 1966-1976 |
Chevrolet Caprice |
| 1965-1973 |
Chevrolet Chevelle |
| 1968 |
Chevrolet Chevy II |
| 1965-1974 |
Chevrolet Corvette |
| 1963 |
Chevrolet Impala |
| 1965-1976 |
Chevrolet Impala |
| 1970-1972 |
Chevrolet Kingswood |
| 1973-1975 |
Chevrolet Laguna |
| 1966-1967 |
Chevrolet Malibu |
| 1973-1975 |
Chevrolet Malibu |
| 1970-1975 |
Chevrolet Monte Carlo |
| 1969-1970 |
Chevrolet Nova |
| 1970 |
Chevrolet Townsman |
| Attributes |
| Amazon ASIN |
N/A |
| ASIN |
B004NIMPXA |
| C.A.R.B. E.O. Number |
N/A |
| C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for On-Road Vehicles? |
No |
| C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? |
Yes, but must be a race/competition only vehicle. |
| C.A.R.B. Exemption Reason |
N/A |
| California Proposition 65 |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| Country of Origin (Primary) |
US |
| Emission Code |
Legal US |
| Engine Family |
Chevrolet 396-454 c.i. 8 Cylinder (1967-1996), Chevrolet 396-454 c.i. 8 Cylinder (1967-1996) |
| Engine Make/Size |
Chevy Big Block (396-454) |
| Harmonized Tariff Code (Schedule B) |
8409914000 |
| Hazardous Material Code |
N |
| Life Cycle Status Code |
Available to Order |
| Maximum Valve Spring Open Pressure |
1000, 1000 |
| NAFTA Preference Criterion Code |
B |
| Ratio |
1.6 |
| Rocker Arm Material |
8650 Chromemoly Steel, 8650 Chromemoly Steel |
| Rocker Arm Ratio |
1.6, 1.6 |
| Rocker Arm Series |
Ultra Pro Magnum XD, Ultra Pro Magnum XD |
| Rocker Stud Diameter |
7/16, 7/16 |
| SDR Required Flag |
N |
| SDS Sheet Number |
N/A |
| Stud Size |
7/16 |
| GTIN |
00036584232575 |
