What is the advantage of a 1.8:1 rocker arm ratio?

A 1.8:1 ratio means the rocker arm will open the valve further than a stock ratio. This increased lift can help improve airflow into the cylinder, potentially leading to better performance and power gains without changing the camshaft.

What is the material and strength of these rocker arms?

These Ultra Pro Magnum rocker arms are made from 8650 chromemoly steel and finished with a black oxide coating. They are built to withstand significant spring pressure, up to 850 lbs.

Are any other parts needed for installation?

This set includes 16 rocker arms and the necessary bolts for pedestal mount LS engines. It is recommended to refer to your engine's service manual for specific installation procedures and any additional hardware or tools that may be required.

COMP Cams LS Rocker Arms 1.8 Ratio 1677-16

Name: COMP Cams Rocker Arms GM LS1LS2LS6 1.8
Brand: COMP Cams
SKU: comp-cams-comp-cams-rocker-arms-gm-ls1ls2ls6-1-8-t14-4390735
Price: 617.86 USD
Availability: BackOrder

COMP Cams Rocker Arms GM LS1LS2LS6 1.8

$617.86

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

COMP Cams Rocker Arms GM LS1LS2LS6 1.8Engine Rocker Arm

Key Features

Fits a wide range of GM LS engines, including LS1, LS2, LS6, and various truck engines.
Features a 1.8:1 ratio for increased valve lift over stock.
Constructed from 8650 chromemoly steel with a black oxide coating for durability.
Can withstand up to 850 lbs of spring pressure, suitable for performance applications.
Designed for pedestal mount LS engines with cathedral port heads.
Includes a full set of 16 bolt-down rockers and mounting bolts.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

COMP Cams is well-known for making performance valvetrain components, and their Ultra Pro Magnum rocker arms are a prime example of that expertise. If you're working on a GM LS engine, these rockers are designed to give you a bit more lift and a stiffer valvetrain without needing to change your camshaft. They're a popular choice for LS1, LS2, LS6, and truck engines like the 4.8L, 5.3L, and pre-'07 6.0L, especially those with cathedral port heads.

These rockers are built from 8650 chromemoly steel and finished with a black oxide coating, making them strong enough to handle up to 850 lbs of spring pressure. The 1.8:1 ratio means they'll open the valves further than stock, increasing lift and potentially improving airflow and power. This set includes 16 bolt-down rockers and the necessary bolts, designed for pedestal mount LS engines. They fit a wide range of vehicles, including models like the Chevrolet Silverado, GMC Sierra, and Cadillac Escalade.

When installing these, remember they are designed for non-adjustable pedestal mount heads. It's always a good idea to consult your engine's specific service manual for detailed installation procedures and torque specifications to ensure everything is set up correctly for optimal performance and longevity.