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PRW LS Series Fulcrums

PRW LS Series fulcrums are performance upgrade kits for GM LS engine rocker arms. They replace the stock rocker fulcrum with a stronger trunnion assembly—often featuring drawn cup bearings or silicone bronze bushings instead of the factory needle bearings—to enhance durability and handle higher lift cams and RPMs. These kits are designed to upgrade the stock LS rocker arms to make them more robust for performance applications. Key features: * The primary purpose is to improve the strength and durability of factory LS rocker arms, not to replace them entirely * Kits typically include replacement fulcrums (trunnions), circlips, and fasteners for the 16 rocker arms in a V8 engine * Kits often replace the stock's "uncaptured" needle bearings with more robust drawn cup bearings or oil-lubricated silicone bronze bushings, which are less prone to failure and collapsing * This upgrade makes the valvetrain more reliable under the stress of performance modifications like high-lift camshafts and stiffer valve springs * They provide a significant strength upgrade without the cost of purchasing a full set of high-end aftermarket rocker arms

Not Yet Reviewed

$3.97

PRW LS Fulcrum Installation Tool Washers

PRW offers replacement washers for its LS fulcrum installation tool, which is used to help install or upgrade rocker arms on GM LS series engines. The durable rubber thrust washers protect the rocker arm during the installation process. Sold in pairs.

Not Yet Reviewed

$9.91

PRW Rocker Arm Bolts

PRW rocker arm bolts are offered in different underhead lengths, either individually or in sets of different quantities. They are manufactured from premium steel and treated with a black oxide finish. Choose the preferred size to meet your application needs.

Not Yet Reviewed

$3.05

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$7.27

PRW RockerLocs

PRW RockerLocs stabilize your rockers. Constructed from 5140 chromoly steel and heat-treated, they are precision ground for excellent runout to keep your rocker arms in place. RockerLocs for PRW rocker arms and stud girdles are available in 3/8 in. and 7/16 in. diameters.

3.67 out of 5 stars ( 3 )

$8.97

PRW Pushrod Guideplates (PowerPlus+)

PRW pushrod guideplates (PowerPlus+) are made from high-treated steel alloy to prevent premature wear—and are black oxide coated to resist corrosion. They make valve operation smoother and more efficient, reducing unwanted sideways motion of the pushrod. These guideplates are recommended for use with high performance hardened pushrods.

1.0 out of 5 stars ( 1 )

$6.10

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$6.36

PRW Water Pump Flange Bolts

PRW's pulley girdle strengthens the water pump pulley for supercharger applications, and PRW offers the right flange bolts to brace the pulley properly. Included in the girdle kits, they are also conveniently offered as replacements, providing the correct fit and reliable performance, matching that of the originals. Service your PRW water pump pulley girdle with PRW flange bolts.

Not Yet Reviewed

$8.38

PRW Rocker Arm Adjuster Screws

PRW rocker arm adjuster screws are designed to thread into your rocker arm. They are made of hardened steel and feature a black oxide finish for maximum durability. The screws can be adjusted to the pushrod by using the internal Allen head and the 12-point locknut.

3.71 out of 5 stars ( 7 )

$7.33

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$9.86

PRW Rocker Arm Studs

PRW rocker arm studs are premium engine fasteners, made from strong, heat-treated 4135 chromoly steel with rolled threads. They're designed to securely hold rocker arms in place, handling the extreme forces in race and high performance engines for reliable valvetrain operation. The studs are crucial for securing the rocker arms that open and close engine valves, often paired with poly locks and used in upgraded systems for better durability and performance than stock parts. Order the set recommended for your vehicle. Additional product details: * Material: Cold-formed from 4135 chromoly alloy steel for maximum strength * Construction: Rolled threads provide superior durability and resistance to stripping * Application: Engineered for high performance and racing engines where stock studs might fail * Function: They act as threaded posts in the cylinder head, anchoring the rocker arms and associated hardware (like poly locks) * Durability: Standard components can bend or break under high spring pressures and aggressive valve lift * Reliability: PRW studs provide a secure, dependable foundation for the valvetrain in demanding conditions * Upgrades: Essential when upgrading to stronger rocker arms or higher-rate valve springs

Not Yet Reviewed

$4.04

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