GSC Dual Conical Valve Spring and Ti Retainer Set EJ

KEEP YOUR VALVES UNDER CONTROL

GSC's dual conical valve springs. Using a varying coil diameter as well as coil spacing offers a superior damping of valve spring harmonics even compared to beehive springs. Dampening the transfer of valvetrain shock reduces stress and increases the life of components. Dual springs provide increased valve opening range before coil bind, increased heat dissipation, and extended life vs. an equivalent single spring.

Upgraded valve springs are essential for controlling valve movement with more aggressive cam profiles.  A higher spring rate is also necessary under high boost conditions due to the manifold pressures acting against the intake valve opposite of spring pressure.  Spring harmonic frequencies must also be moved outside of the normal operating range to avoid negative effects.  High spring pressures increase frictional losses and reduce spring life.  It is recommended to select the valve spring according to the application and camshaft profile so as to ensure optimum valve control over the expected rpm range without introducing unnecessarily excessive spring forces.

Includes 16 valve springs, 16 retainers, and 16 spring seats.

Valve Spring Specs:

• Seat Pressure = 95lbs @ 1.368/1.092in Installed Height
• Open Pressure = 233lbs @ 0.915/.639in(11.5mm Lift)
• Maximum Valve Lift = 0.512in (13.0mm)
• Max RPM = 10000
• Max Boost = 40psi

What it fits:

• EJ257/EJ255
• EJ207/EJ205
• EJ20X/EJ20Y