Each set comes complete with all valve springs for your engine.

The Skunk2 Pro Series valve springs are among the best valve springs in the sport compact market. Pro Series valve springs are designed to handle the demands of extreme lift camshafts running at the prolonged high RPMs or high levels of boost. The Pro Series Springs have been developed as a result of many years of experience in drag racing and touring car racing. Pro Series springs are made from super clean chrome silicone wire milled in Japan. The dual interference fit valve spring design prevents harmonics and valve float. All Skunk2 valve springs are race tested and proven and can be used with both forced induction and naturally aspirated engines. Pro Series valve springs can handle extreme naturally aspirated engines or engines running mid to high levels of boost.

Spring Base Kit Notes: For some applications (when needed), a Skunk2 Spring Base Kit is included for long-term reliability of your camshafts and valve springs.