MACE 1.9 HIGH RATIO ROLLER ROCKER KIT FOR HOLDEN COMMODORE VS VT VX VU ECOTEC L36 L67 S/C 3.8L V6Mace 1. 9 ratio roller rockers (up from 1. 65) are suitable for Holden Commodore and similar platforms fitted with Ecotec (L36) or L67 supercharged V6 engines. This is a very cost effective way to bump up the performance of your vehicle, by increasing valve lift and allowing your engine to breathe much more efficiently. Manufactured by a renowned engineering company you can be assured of the outstanding quality and workmanship of these remanufactured