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" install height and open pressure of 215lbs (at .450"...

Pro HD Dual Valve Springs (High RPM / Boost) The Pro Dual Valve Springs are a "must-have" upgrade when running bigger lift cams and higher RPM's. With 100lbs of seat pressure 1.400" install height and open pressure of 225lbs (at .450" lift) they will...

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 with all the parts needed to upgrade your 2RZ or 3RZ cylinder head...

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 all the parts needed to upgrade your 2RZ or 3RZ cylinder...

Pro Beehive 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 all the parts needed to upgrade your 1GR cylinder...

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 with all the parts needed to upgrade your 1GR cylinder...

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 all the parts needed to upgrade your 1GR cylinder head...

Dual Valve Springs (Naturally Aspirated / Low Boost) If you're building a 2.4L 2RZ-FE or a 2.7L 3RZ-FE these Dual Valve Springs are a "must-have" upgrade when running bigger lift cams and higher RPM's. With 75lbs of seat pressure (1.4″ install height)...

Spring Seats (Dual Spring) Hardened Valve Spring Shims for 2RZ and 3RZ Street Performer Dual Valve Springs. NOTE: Sold as a set of (16). Contact our Tech Support Line for further information at 928-575-2174. Note: Images are for...

Spring Seat Shim (.015″ / .030" / .060") Hardened Valve Spring Shims for Pro and Street Performer Valve Springs. When installing new valve springs, it is very crucial to get the springs all set up equally for proper valvetrain geometry and longevity...

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 all the parts needed to upgrade your 2TR cylinder head...

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 with all the parts needed to upgrade your 2TR cylinder...