Mitsubishi EVO 4-8 BC Valve Spring / Retainer Kit Boost Controller Give your ignition system a

Give your ignition system a boost with these competition leads

Full twin-scroll

a chemical reaction (polymerization) transforms the layers into a high-pressure thermosetting industrial laminated plastic

This translates into an increase in throttle response

Mitsubishi EVO 4-8 BC Valve Spring / Retainer Kit Boost Controller Give your ignition system aDesigned for high rpm, BC valve springs are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. BC titanium retainers are CNC machined from 6AL4V round bar titanium to exacting tolerances. Spring Pressure: BC1100 Seat: 1. 550" @ 95 lbs Open: 1. 000" @ 235 lbs Coil Bind: 0. 935" (no machine work required)