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 1820 rockers feature a 1.7 ratio for use with 7/16" stud Chevrolet 396-454 Big Block.
Built to outlast and outperform in accuracy and strength, the Ultra Pro Magnum XD rocker arms are engineered from durable 8650 steel and include a machined billet pushrod seat insert for a wide range of super accurate ratios. A unique and wide ratio range to fit almost any popular application from 1.5 to 1.8 in 0.5 in. increments for Chevy and 1.6 to 1.73 for various Ford applications is available. These Ultra Pro Magnum XD rockers are fully rebuildable and boast precision-sorted needle bearings and hardened roller tips. And, 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(moment of inertia) optimization for drag and circle track applications.
Built to outlast and outperform in accuracy and strength, the Ultra Pro Magnum XD rocker arms are engineered from durable 8650 steel and include a machined billet pushrod seat insert for a wide range of super accurate ratios. A unique and wide ratio range to fit almost any popular application from 1.5 to 1.8 in 0.5 in. increments for Chevy and 1.6 to 1.73 for various Ford applications is available. These Ultra Pro Magnum XD rockers are fully rebuildable and boast precision-sorted needle bearings and hardened roller tips. And, 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(moment of inertia) optimization for drag and circle track applications.
- 8650 Chromemoly Steel
- 29 Percent Stronger Than Pro Magnum
- Redesigned Steel Stud Mount Rocker
- Reduced Weight And Greater Strength
- Increased High RPM Stability
- Black Oxide Exterior Finish
- Increased Retainer And Valve Spring Clearances
- Lifetime Warranty
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 | |
| ASIN | B004NIKNZM |
| Amazon ASIN | N/A |
| 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 | Yes, Yes |
| 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) |
| GTIN | 00036584232490 |
| 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 | 1.7 |
| Rocker Arm Material | 8650 Chromemoly Steel, 8650 Chromemoly Steel |
| Rocker Arm Ratio | 1.7, 1.7 |
| 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 |
Competition Cams 1820-16 Ultra Pro Magnum XD Roller Rocker Arm Set
Vehicle Fitment
Fitment: Unknown
Product Information
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(For California Residents) WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |