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 1803 rocker features a 1.65 ratio for use with 3/8" stud Chevrolet V6 and 265-400 Small Block.
The Ultra Pro Magnum(TM) 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. These rocker arms are so durable that they come with a lifetime guarantee against breakage. Only accept authentic "COMP" logo rocker arms to ensure quality and reliability.
  • 8650 Steel Construction
  • Outlasts And Outperforms Other Rockers
  • Unique Machined Billet Pushrod Seat
  • FEA And CAD Development
  • Improved Strength And Stiffness
  • Rebuildable Design
  • Engineered For Use In Endurance/Circle/Drag Race
  • Lifetime Warranty

Application 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

Additional Information:

Fast Efficient Shipping

Through our distribution network Deliveries can be as fast as Next Day Delivery.
Delivery times vary by destination, tracking information is provided with every purchase.

Get it Installed

JB's Power Centre offers on-site professional installation services in Calgary and Edmonton, AB.
We have on staff licensed Mechanical Technicians as well as MECP Certified 12-Volt Technicians.

* Extend your products Manufacturer Warranty

All products include a manufacturer warranty, but you can extend this warranty with
JB's Purchase Protection Plan
*Available on select products.