Supertech Performance SPRK-MM16D2 1.6lts Dual Spring kit / 70lbs@33.50mm(16) SPR-TS1015/MI + (16)RET-TS60/MA2 + (16)SEAT-TS/MA18E.

Supertech Performance SPRK-MM16D2 1.6lts Dual Spring kit / 70lbs@33.50mm(16) SPR-TS1015/MI + (16)RET-TS60/MA2 + (16)SEAT-TS/MA18E.

Supertech valve springs are computer designed to ensure smooth harmonics under high RPM and load. The stress levels are kept under control and fatigue is reduced for long durability under extreme conditions. These springs are made of premium Superclean Chrome Silicon Vanadium steel alloy, which is a tough alloy that was designed for higher performance and durability at high RPM's and memory retention.