Eng Rocker Arm Kit

Increase Strength Over Stock, While Increasing Lift without Swapping Cams. For LS3/L99/L76 and Other Rectangle-Port Head Equipped LS Applications. Includes Full Set of (16) Stud-Mount Rockers (with Poly Locks), 3/8" Studs and Raised Guide Plates for 5/16" Pushrods. The above image does not show a complete set of Rockers, poly-locks, Studs, or guide plates.

Additional Information

Convert your LS3 engine to an adjustable valvetrain with the Ultra Pro Magnum Rocker Kit. Our kit includes 1.8 Ultra Pro Magnum Rockers, guideplates, 3/8" studs, adjusting nuts and set screws for a complete adjustable valvetrain solution.

Part Type

Engine Rocker Arm Kit

Product Overview

COMP Cams offers GM Gen III LS1/LS6 and Gen IV LS3 Ultra Pro Magnum Rocker Arm Kits, both of which include rocker arms, guide plates (5/16" or 3/8"), rocker studs, adjusting nuts and set screws. Designed to fit under the stock valve covers without machining, COMP GM LS Ultra Pro Magnum Rocker Arm Upgrade Kits are the simple solution upgrading the valve train components in your GM Gen III/IV engine.

All components listed are available separately and in sets. COMP Cams Rocker Upgrade Kits do NOT include pushrods, but they are available separately; see pushrod lengths in the application chart.

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Product Downloads

#	Document Type	Download
1.	Catalog

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Rocker Arm Kit, Ultra Pro Magnum Full Roller Rockers, 1.8 Ratio, Chromoly Steel, 3/8 in. Stud Size, Guide Plates, Chevy, Set of 16

COMP Cams Ultra Pro Magnum rocker arm upgrade kits include Ultra Pro Magnum rocker arms, guide plates, rocker studs, adjusting nuts, and set screws. These kits are designed to fit under the stock valve covers without machining. Build up your engine with COMP Cams Ultra Pro Magnum upgrade kits.