Product Details

Rocker Stud Diameter	7/16
Rocker Arm Ratio	1.52
C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?	Yes, but must meet tailpipe emission standards for year of vehicle.
Maximum Valve Spring Open Pressure	850
C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?	Yes, but must meet tailpipe emission standards for year of vehicle.
Title	Ultra Pro Magnum Rocker Arm Set w/ 1.6 Ratio for SBC w/ Twisted Wedge Head
AMAZON ASIN	B005H89RDQ
C.A.R.B. E.O. Number	N/A
Engine Family	Chevrolet 262-400 c.i. 8 Cylinder (1958-1998) w/ Twisted Wedge Head, Intake Valve
Rocker Arm Series	Ultra Pro Magnum
C.A.R.B. Exemption Reason	N/A
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. Exempt for On-Road Vehicles?	No
California Proposition 65	WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?	Yes, but must meet tailpipe emission standards for year of vehicle.
Rocker Arm Material	8650 Chromemoly Steel
Part Terminology	Engine Rocker Arm Kit

Features & Benefits

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.

7/16\" Stud - 1.52 Ratio - Chevy V8 265-400 (SBC) with Twisted Wedge Heads. Designed for intake valves only. Twisted Wedge heads use standard SBC exhaust valve Rockers.
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.

Product Details

Features & Benefits

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