Chevy Sbc 350 12 Point Black Oxide Intake Manifold Bolt Kit These replacement valve seats are

These replacement valve seats are just like the originals

reduce stretching and prevent the belt from slipping

from performance street to competition use

We designed our fabricated aluminum sheet metal intake manifold to improve the look and performance of your LS engine

Chevy Sbc 350 12 Point Black Oxide Intake Manifold Bolt Kit These replacement valve seats areSpeedmaster black oxide coated chromoly intake manifold bolts are rated at 170,000 psi. They're precision machined for optimum thread engagement and have a wide area flange for better load distribution. They also feature precision rolled threads, which prevent galling, while promoting more consistent torque loading.