RCM / Omega Piston Set - WRX & STI 1992-1998 (V1-V4) EJ20 Engine - Fuel System_Injectors What is IAG’s Closed Deck

What is IAG’s Closed Deck Process

With oil temperatures greatly increased the viscosity of the oil naturally thins lessening its ability to efficiently lubricate precious engine components which eventually leads to premature wear and in extreme cases engine failure

Manufactured from pulverized lava rock and stranded into a fibre material which is then woven into a proprietary weave

effective modification has been designed to assist the Impreza with its oil supply issues and is now regarded as a "must have" modification with any Impreza engine build

will need to be purchased separately

RCM / Omega Piston Set - WRX & STI 1992-1998 (V1-V4) EJ20 Engine - Fuel System_Injectors What is IAG’s Closed DeckRCM have always chosen Omega as their preferred piston manufacturer, not only because of their extensive experience within motorsport but also for the incredible accuracy and attention to detail that is applied to every aspect of their manufacturing. So why forged? A forging is still the best way to manufacture a piston, not just from a production point of view but for the strength of the piston. There are certain areas where a piston machined from