4B11T Evo X Valve Spring Kits

GSC Power-Division High Pressure Conical Valve Spring with Ti Retainer for the Mitsubishi 4B11T includes 16 titanium retainers,16 conical valve springs, and 16 valve spring seats. True conical valve springs are not a new concept and are industry proven to provide several key advantages over traditional spring designs. A major advantage of conical springs vs. traditional cylindrical or beehive springs is the damping and removal of valvetrain harmonics. Of the three designs, conical springs are the front runners in valvetrain harmonic stability. Utilizing a varying coil diameter as well as coil spacing, a conical spring acts as a natural harmonic damper in the transfer of valvetrain shock. This translates to less stress, less wear, and a longer life of the included components. This level of protection is needed in today’s engines being pushed to their physical and mechanical limits by aftermarket modifications. Every GSC conical spring offers a super finished surface treatment to go along with the patented, multi-step heat treatment process. The finished product is an extremely reliable, high-performance spring allowing the users to push higher RPMs, use more aggressive cam profiles, and turn up higher boost pressures.

• Max RPM: 11,000
• Max boost: 55 psi
• Up to 11.30mm lift cams

GSC Power-Division Beehive Spring Kit with Titanium Retainers for the Mitsubishi 4B11T includes 16 titanium retainers and 16 beehive valve springs. Our beehive spring utilizes advanced material heat treatment methods for superior load loss capabilities. These springs have the highest level of spring load retention while still maintaining good fatigue throughout the life of the spring. Beehive springs allow for the use of a smaller, lighter retainer allowing for higher RPM and more valve control. 

• Max RPM: 9,500
• Max boost: 40 psi
• Up to 12.2mm lift cams