These Ultra Pro Magnum rockers are made of black oxide coated 8650 chromemoly steel that can withstand up to 850 lbs of spring pressure. Featuring a 1.52 ratio, these rockers fit '88+ Chevrolet Small Blocks with a 3/8" diameter stud.
Ultra Pro Magnumâ„¢ Roller Rocker Arms not only live up to the lofty standards of the original Pro Magnums but they also take Stud mount Rocker performance, stability and value to a whole new level. The 8650 chromemoly material and arched, web-like design deliver increased strength and rigidity while still reducing the moment of inertia and optimizing the dynamic balance. A unique black oxide exterior finish helps prevent corrosion and increases durability. Featuring Oversized trunnions, precision-sorted needle bearings and hardened Roller tips for the ultimate in performance and dependability. Optimized retainer and valve spring clearances allow for use of most diameter springs, retainers and +.050" locks without clearance or fitment issues.
Ultra Pro Magnumâ„¢ Roller Rocker Arms not only live up to the lofty standards of the original Pro Magnums but they also take Stud mount Rocker performance, stability and value to a whole new level. The 8650 chromemoly material and arched, web-like design deliver increased strength and rigidity while still reducing the moment of inertia and optimizing the dynamic balance. A unique black oxide exterior finish helps prevent corrosion and increases durability. Featuring Oversized trunnions, precision-sorted needle bearings and hardened Roller tips for the ultimate in performance and dependability. Optimized retainer and valve spring clearances allow for use of most diameter springs, retainers and +.050" locks without clearance or fitment issues.
- Chevy V8 265-400 c.i.d. (SBC) - 1988 and later with Self Aligning Rockers - 3/8" Stud - 1.52 Ratio
- Investment cast 8650 chromemoly body and arched, web-like design deliver increased strength and rigidity while still reducing the moment of inertia. Unique black oxide exterior finish helps prevent corrosion and increases durability.
- Optimized retainer and valve spring clearances allow for use of most diameter springs, retainers and +.050" locks without clearance or fitment issues.
- Feature Oversized trunnions, precision-sorted needle bearings and hardened Roller tips.
- Lifetime Warranty - So strong that we guarantee the Rocker bodies against breakage for life. For use with up to 850 lbs of open spring pressure.
Application Summary:
| Year | Make/Model |
|---|---|
| 1991-1993 | Buick Commercial Chassis |
| 1991-1993 | Buick Roadmaster |
| 1990-1992 | Cadillac Brougham |
| 1992-1993 | Cadillac Commercial Chassis |
| 1993 | Cadillac Fleetwood |
| 1988-1994 | Chevrolet Blazer |
| 1988-1995 | Chevrolet C1500 |
| 1992-1995 | Chevrolet C1500 Suburban |
| 1988-1995 | Chevrolet C2500 |
| 1992-1995 | Chevrolet C2500 Suburban |
| 1988-1995 | Chevrolet C3500 |
| 1988-1992 | Chevrolet Camaro |
| 1988-1996 | Chevrolet Caprice |
| 1988-1991 | Chevrolet Corvette |
| 1988-1995 | Chevrolet G10 |
| 1988-1995 | Chevrolet G20 |
| 1988-1996 | Chevrolet G30 |
| 1988-1995 | Chevrolet K1500 |
| 1992-1995 | Chevrolet K1500 Suburban |
| 1988-1995 | Chevrolet K2500 |
| 1992-1995 | Chevrolet K2500 Suburban |
| 1988-1995 | Chevrolet K3500 |
| 1988 | Chevrolet Monte Carlo |
| 1988 | Chevrolet R10 Suburban |
| 1989-1991 | Chevrolet R1500 Suburban |
| 1988 | Chevrolet R20 |
| 1988 | Chevrolet R20 Suburban |
| 1989-1991 | Chevrolet R2500 Suburban |
| 1988 | Chevrolet R30 |
| 1989-1991 | Chevrolet R3500 |
| 1995 | Chevrolet Tahoe |
| 1988 | Chevrolet V10 Suburban |
| 1989-1991 | Chevrolet V1500 Suburban |
| 1988 | Chevrolet V20 Suburban |
| 1989-1991 | Chevrolet V2500 Suburban |
| 1988 | Chevrolet V30 |
| 1989-1991 | Chevrolet V3500 |
| 1988-1995 | GMC C1500 |
| 1992-1995 | GMC C1500 Suburban |
| 1988-1995 | GMC C2500 |
| 1992-1995 | GMC C2500 Suburban |
| 1988-1995 | GMC C3500 |
| 1988-1995 | GMC G1500 |
| 1988-1995 | GMC G2500 |
| 1988-1996 | GMC G3500 |
| 1988-1991 | GMC Jimmy |
| 1988-1995 | GMC K1500 |
| 1992-1995 | GMC K1500 Suburban |
| 1988-1995 | GMC K2500 |
| 1992-1995 | GMC K2500 Suburban |
| 1988-1995 | GMC K3500 |
| 1988-1991 | GMC R1500 Suburban |
| 1988-1989 | GMC R2500 |
| 1988-1991 | GMC R2500 Suburban |
| 1988-1991 | GMC R3500 |
| 1988-1991 | GMC V1500 Suburban |
| 1988-1991 | GMC V2500 Suburban |
| 1988-1991 | GMC V3500 |
| 1992-1995 | GMC Yukon |
| 1991-1992 | Oldsmobile Custom Cruiser |
| 1988-1991 | Pontiac Firebird |
| Attributes | |
| Amazon ASIN | B003HGQQOI |
| ASIN | B003HGQQOI |
| 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 262-400 c.i. 8 Cylinder (1988+) w/ Self-Aligning Rockers, Chevrolet 262-400 c.i. 8 Cylinder (1988+) w/ Self-Aligning Rockers |
| Engine Make/Size | Chevy Small Block (262-400) |
| Harmonized Tariff Code (Schedule B) | 8409914000 |
| Hazardous Material Code | N |
| Life Cycle Status Code | Available to Order |
| Maximum Valve Spring Open Pressure | 850, 850 |
| NAFTA Preference Criterion Code | B |
| Ratio | 1.52 |
| Rocker Arm Material | 8650 Chromemoly Steel, 8650 Chromemoly Steel |
| Rocker Arm Ratio | 1.52, 1.52 |
| Rocker Arm Series | Ultra Pro Magnum, Ultra Pro Magnum |
| Rocker Stud Diameter | 3/8, 3/8 |
| SDR Required Flag | N |
| SDS Sheet Number | N/A |
| Stud Size | 3/8 |
| GTIN | 00036584196440 |