1997-2004 Corvette Rocker Arms

There’s no denying that the GM LS1 engine platform has proven itself as a performer. The valve train is no different, with an improved design that makes for a perfect combination of power and durability to complement the impressive cathedral port cylinder head design. The rocker arm design features a lightweight, yet stiff rocker body that is strong enough for most applications. However, when it comes to high performance racing applications, high rpm and high valve spring pressures can put the factory rocker arm’s trunion under intolerable stress.

Enter COMP Cams® with a new LS1 rocker arm retro-fit trunion kit that replaces the cageless, loose OEM needle bearings and powdered metal trunion with a premium 8620 steel alloy trunion and caged roller bearings for added durability. The new design from COMP Cams® utilizes caged roller bearings that greatly reduce the possibility of the bearing failure experienced with stock LS1 needle bearings, which can send loose needles throughout the engine upon failure.

Perfect for drag and circle track racing applications that mandate the use of stock engine components, this performance rocker arm modification is a “must have” upgrade for your LS1 factory rocker arms. As proof of success, for the last two years this rocker arm trunion upgrade has been tested and performance-proven in the NASCAR GM LS spec engine series.

T&D Machine Products Shaft Mount Rocker Arms are the perfect compliment to our solid-roller camshaft & cylinder head packages. Shaft mounted rockers prevent rocker arm stud flex, which can rob horsepower and even cause damage to your engine. Shown with Thunder Racing valve cover spacers, available below. (LS1 rockers pictured.)

COMP Cams® now offers four bolt-on rocker arm kits for the GM Gen III/LS1/LS6 engines. The first is a 1.75:1 rocker ratio, 5/16² guide plate kit including Pro Magnum Rocker Arms™, guide plates, rocker studs, adjusting nuts and set screws. The second as listed above except with 3/8² flat guide plates. The third and fourth kits are as listed above but feature 1.85:1 rocker ratio Pro Magnum™ rocker arms. Modifications to the valvecovers or Valvecover spacers may be required for installation.