Our competition-quality valves are constructed of forged EN24N stainless steel, with chrome plated stem and stellite tip. They are high-flow thin profile with waisted stems. All take single groove keeper. Long-stem valves for 1275 12G940 and 12G1316 cylinder heads. These valves require matching keepers, see 88G0459. Sold each.
Verify which type of valve tip you need, see comparison picture.