PAC Racing Springs PAC-S133 Chromoly Valve Spring Locator, 1.650 in OD, 0.570 in ID

The PAC Racing Springs PAC-S133 Steel C/M Spring Seat is an inside valve spring locator designed to provide stable, accurate spring positioning in high-performance valvetrain applications. Manufactured from durable chromoly steel, this locator helps maintain proper spring alignment while supporting consistent valve spring operation under demanding engine conditions.
The PAC-S133 features a 1.650-inch outside diameter, a 0.570-inch inside diameter, and accommodates a 0.630-inch spring inside diameter. Its 0.030-inch thickness provides a reliable seating surface without adding unnecessary material to the valvetrain assembly. This inside-style locator is suited for builders and performance enthusiasts who require dependable spring control and precise component fitment.
Designed by PAC Racing Springs, the PAC-S133 combines robust construction with application-focused dimensions for use in performance cylinder heads and custom valvetrain systems. Verify the locator dimensions, spring compatibility, and cylinder head configuration before installation to ensure proper fit and clearance. Each locator is sold individually.

Features:

• Brand: PAC Racing Springs

• Part Number: PAC-S133

• Type: Inside valve spring locator

• Material: Chromoly steel

• Outside Diameter: 1.650 inches

• Inside Diameter: 0.570 inches

• Spring Inside Diameter: 0.630 inches

• Thickness: 0.030 inch

• Quantity: Sold individually