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Engines and Components› Camshafts and Valvetrain

Comp Cams

Ultra Pro Magnum Shaft Mount Full Roller Rocker Arm

$88.97 $76.95 Save $12.02

SKU: COM1621R-1

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In Stock
Ships by Aug 3
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30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Comp Cams Ultra Pro Magnum Rocker Arm is engineered for high-performance Mopar B/RB-Series V8 applications, specifically for 383-440 cubic inch engines. Constructed from SAE 8620 chromemoly steel, these shaft-mount rocker arms are heat-treated to ensure maximum strength and stiffness, capable of withstanding demanding engine conditions and higher spring rates.

MIA's Description

The Comp Cams Ultra Pro Magnum rocker arm is a shaft-mount, full roller component designed for Mopar B/RB-Series V8 engines. Made from heat-treated SAE 8620 chromemoly steel, it offers maximum strength and stiffness for high-performance applications. This rocker arm features proprietary bushing inserts and a unique oiling system for durability and critical part lubrication.

Fitment

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandComp Cams
Part NumberCOM1621R-1
CategoryEngines and Components

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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