Supertech

Pro Chromoly Retainer (Dual Spring) For hot street motors or moderate race motors, the Chromoly retainers fit the bill nicely. Use these with our dual valve springs for proper valvetrain control up...

Pro Dual Valve Spring & Retainer Kit LC Engineering has taken the guesswork out of choosing the right parts for your cylinder head! We have created a spring & retainer kit that comes with...

Pro Dual Valve Spring & Retainer Kit LC Engineering has taken the guesswork out of choosing the right parts for your cylinder head! We have created a spring & retainer kit that comes with...

Pro Dual Valve Springs (Naturally Aspirated / Low Boost) The Pro Dual Valve Springs are a "must-have" upgrade when running bigger lift cams and higher RPM's. With 75lbs of seat pressure at a 1.400"...

Pro Dual Valve Springs The Pro Dual Valve Springs are a "must-have" upgrade when running cam lift over .455" or when sustaining a constant 5,000rpm or higher. With 100lbs of seat pressure and open...

Pro HD Dual Valve Spring & Retainer Kit LC Engineering has taken the guesswork out of choosing the right parts for your cylinder head! We have created a spring & retainer kit that comes...