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. This 1801 rocker features a 1.5 ratio for use with 3/8" stud Chevrolet V6 and 265-400 Small 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.
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 in a set of 16 under 1801-16Application Summary:
| Year | Make/Model |
|---|---|
| 1973-1974 | Buick Apollo |
| 1973 | Buick Centurion |
| 1973-1974 | Buick Century |
| 1977-1980 | Buick Century |
| 1991-1993 | Buick Commercial Chassis |
| 1976 | Buick Electra |
| 1973 | Buick Estate Wagon |
| 1972 | Buick GS |
| 1972-1974 | Buick LeSabre |
| 1978 | Buick LeSabre |
| 1973-1974 | Buick Regal |
| 1977-1980 | Buick Regal |
| 1991-1993 | Buick Roadmaster |
| 1972 | Buick Skylark |
| 1977-1979 | Buick Skylark |
| 1990-1992 | Cadillac Brougham |
| 1992-1993 | Cadillac Commercial Chassis |
| 1980 | Cadillac Eldorado |
| 1993 | Cadillac Fleetwood |
| 1980 | Cadillac Seville |
| 1975-1982 | Checker Marathon |
| 1955-1975 | Chevrolet Bel Air |
| 1958-1972 | Chevrolet Biscayne |
| 1958-1961 | Chevrolet Brookwood |
| 1969-1972 | Chevrolet Brookwood |
| 1967-1973 | Chevrolet Camaro |
| 1975-1992 | Chevrolet Camaro |
| 1966-1996 | Chevrolet Caprice |
| 1964-1973 | Chevrolet Chevelle |
| 1963-1968 | Chevrolet Chevy II |
| 1955-1972 | Chevrolet Corvette |
| 1974-1982 | Chevrolet Corvette |
| 1984-1991 | Chevrolet Corvette |
| 1958 | Chevrolet Del Ray |
| 1959-1985 | Chevrolet Impala |
| 1969-1972 | Chevrolet Kingswood |
| 1973-1976 | Chevrolet Laguna |
| 1964-1967 | Chevrolet Malibu |
| 1973-1983 | Chevrolet Malibu |
| 1970-1988 | Chevrolet Monte Carlo |
| 1976-1979 | Chevrolet Monza |
| 1969-1979 | Chevrolet Nova |
| 1955-1957 | Chevrolet One-Fifty Series |
| 1969-1972 | Chevrolet Townsman |
| 1955-1957 | Chevrolet Two-Ten Series |
| 1959 | Fiat 1100 |
| 1975 | Oldsmobile Custom Cruiser |
| 1977 | Oldsmobile Custom Cruiser |
| 1991-1992 | Oldsmobile Custom Cruiser |
| 1972-1973 | Oldsmobile Cutlass |
| 1978-1980 | Oldsmobile Cutlass |
| 1978-1980 | Oldsmobile Cutlass Calais |
| 1980 | Oldsmobile Cutlass Cruiser |
| 1982 | Oldsmobile Cutlass Cruiser |
| 1978-1980 | Oldsmobile Cutlass Salon |
| 1972-1973 | Oldsmobile Cutlass Supreme |
| 1978-1980 | Oldsmobile Cutlass Supreme |
| 1972-1973 | Oldsmobile Delta 88 |
| 1975 | Oldsmobile Delta 88 |
| 1977 | Oldsmobile Delta 88 |
| 1972 | Oldsmobile F85 |
| 1973 | Oldsmobile Omega |
| 1977-1979 | Oldsmobile Omega |
| 1977-1979 | Oldsmobile Starfire |
| 1972-1973 | Oldsmobile Vista Cruiser |
| 1974-1975 | Pontiac Bonneville |
| 1983-1986 | Pontiac Bonneville |
| 1967 | Pontiac Catalina |
| 1974-1975 | Pontiac Catalina |
| 1972-1974 | Pontiac Firebird |
| Attributes | |
| Amazon ASIN | B005JUX2NS, B005JUX2NS |
| ASIN | B005JUX2NS |
| C.A.R.B. E.O. Number | N/A, N/A |
| C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967? | Yes, but must meet tailpipe emission standards for year of vehicle., Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for On-Road Vehicles? | No, No |
| C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? | Yes, but must be a race/competition only vehicle., Yes, but must be a race/competition only vehicle. |
| C.A.R.B. Exemption Reason | N/A, 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 V6 200-262, Chevrolet V6 200-262 |
| Engine Make/Size | Chevy Small Block (265-400) |
| 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 |
| Position | N/A |
| Ratio | 1.5 |
| Rocker Arm Material | 8650 Chromemoly Steel, 8650 Chromemoly Steel, 8650 Chromemoly Steel |
| Rocker Arm Ratio | 1.5, 1.5, 1.5 |
| Rocker Arm Series | Ultra Pro Magnum XD, Ultra Pro Magnum XD, Ultra Pro Magnum XD |
| Rocker Stud Diameter | 3/8, 3/8, 3/8 |
| SDR Required Flag | N |
| SDS Sheet Number | N/A |
| Stud Size | 3/8 |
| GTIN | 00036584231998 |