2007-2015 Evo X Dual Valve Spring and Retainer Kit by Supertech (SPR-M1012/EX1)

Evo X Dual Valve Spring and Retainer Kit

Valve springs are made with premium Superclean Chrome Silicon Vanadium Steel alloy for higher performance & durability at high rpms and better memory. Computer designed to ensure that wire stress levels do not overpass the limits of stress defined in the diagrams of fatigue for long durability under extreme conditions. Computer software also allows us to make sure that the harmonics are well under control.

The Retainers are manufactured with high quality military certified Titanium alloy, CNC machined for a tight fit that will ensure a long durability.

SPR-M1012/EX1

• Outer Spring – O.D. 27.50 mm I.D. 20.00 mm
• Inner Spring – O.D. 20.00 mm I.D. 15.20 mm
• Pressure – Seat 75lbs @ 34.50 mm Open(lift) 185lbs @11.5 mm
• Max Net Lift – 14.50 mm
• Coil Bind – 20.00 mm
• Rate – 9.60 lbs/mm

SPR-M1015/EX2

• Outer Spring – O.D. 27.50 mm I.D. 20.00 mm
• Inner Spring – O.D. 20.00 mm I.D. 15.20 mm
• Pressure – Seat 75lbs @ 35.30 mm Open(lift) 215lbs @11.5 mm
• Max Net Lift – 14.50 mm
• Coil Bind – 20.70 mm
• Rate – 12.10 lbs/mm

SPR-M1015/EX3

• Outer Spring – O.D. 27.50 mm I.D. 20.00 mm
• Inner Spring – O.D. 20.00 mm I.D. 15.20 mm
• Pressure – Seat 85lbs @ 34.50 mm Open(lift) 228lbs @11.5 mm
• Max Net Lift – 13.80 mm
• Coil Bind – 20.70 mm
• Rate – 12.10 lbs/mm

Important Note: It has been reported that the increased open pressures of the M1015 springs may cause issues in regards to MIVEC control that cannot be alleviated by tuning alone. We recommend using the M1012 springs in daily driven applications and the M1015 springs in race applications utilizing heavier weight oils only. Please feel free to contact us with any additional questions or concerns.