MACE HIGH RATIO ROLLER ROCKER AND PUSHROD KIT TO SUIT HOLDEN ECOTEC L36 L67 SUPERCHARGED 3.8L V6Mace 1. 9 ratio roller rockers (up from 1. 65) with Crow Cams pushrods 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. Key Benefits: Gains of around 13 to 16kW are not uncommon. Higher in some cases where others mods have been