Product details:

Crane Cams 64308-1: Valve Spring Kit, Single Springs, Steel Retainers, Kit - Crane valve spring and retainer kits offer you an easy, cost-saving method of ensuring that your cam is matched with the correct components. The springs will help strictly stock motors by releasing some of the horsepower that the stock components are holding back. They're heat-treated and can be installed in most cylinder heads with no machining.