This Ultra Pro Magnum rocker is made of black oxide coated 8650 chromemoly steel that can withstand up to 850 lbs of spring pressure. Featuring a 1.6 ratio, this rocker fits '88+ Chevrolet Small Block and V6 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 V6 200-262 and V8 265-400 c.i.d. (SBC) - 1988 and later with Self Aligning Rockers - 3/8" Stud - 1.6 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 2002-2007 Buick Rendezvous 1991-1993 Buick Roadmaster 2005-2007 Buick Terraza 1990-1992 Cadillac Brougham 1992-1993 Cadillac Commercial Chassis 1993 Cadillac Fleetwood 1988-2005 Chevrolet Astro 1988-2005 Chevrolet Blazer 1988-1998 Chevrolet C1500 1992-1995 Chevrolet C1500 Suburban 1988-1995 Chevrolet C2500 1992-1995 Chevrolet C2500 Suburban 1988-1995 Chevrolet C3500 1988-1995 Chevrolet Camaro 1988-1996 Chevrolet Caprice 1988-1991 Chevrolet Corvette 2005-2007 Chevrolet Equinox 1996-2007 Chevrolet Express 1500 1996-2005 Chevrolet Express 2500 1988-1995 Chevrolet G10 1988-1995 Chevrolet G20 1988-1996 Chevrolet G30 2000-2007 Chevrolet Impala 1988-1998 Chevrolet K1500 1992-1995 Chevrolet K1500 Suburban 1988-1995 Chevrolet K2500 1992-1995 Chevrolet K2500 Suburban 1988-1995 Chevrolet K3500 1991-1997 Chevrolet Lumina 1996 Chevrolet Lumina APV 2004-2007 Chevrolet Malibu 1988 Chevrolet Monte Carlo 1995-1997 Chevrolet Monte Carlo 2000-2007 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 1988-2004 Chevrolet S10 1988-1994 Chevrolet S10 Blazer 1999-2007 Chevrolet Silverado 1500 1995 Chevrolet Tahoe 2005-2007 Chevrolet Uplander 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 1997-2005 Chevrolet Venture 2007 GMC Acadia 1988-1998 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 1988-2001 GMC Jimmy 1988-1998 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
| Attributes | |
| Amazon ASIN | B005H89RIQ, B005H89RIQ |
| ASIN | B005H89RIQ |
| 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 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 200-262, 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 | 850, 850 |
| NAFTA Preference Criterion Code | B |
| Position | N/A |
| Ratio | 1.6 |
| Rocker Arm Material | 8650 Chromemoly Steel, 8650 Chromemoly Steel, 8650 Chromemoly Steel |
| Rocker Arm Ratio | 1.6, 1.6, 1.6 |
| Rocker Arm Series | Ultra Pro Magnum, Ultra Pro Magnum, Ultra Pro Magnum |
| Rocker Stud Diameter | 3/8, 3/8, 3/8 |
| SDR Required Flag | N |
| SDS Sheet Number | N/A |
| Stud Size | 0.3750 |
| GTIN | 00036584196464 |