COMP Cams ID spring locators address the shortcomings of older shims by providing a hardened steel seat with an inboard locating shoulder to protect the head and hold the spring in place. Sold as a set, these locators are .60" thick and avoid extensive head machining required by outside-retaining cups, offering a more durable option for high-RPM, high-pressure valve spring applications.
COMP Cams ID Spring Seats 1.5 X 570 X 6