CB Engineering 2005 2006 Jeep Liberty 2.8l CRD Turbo Diesel EGR Valve Block Off Plate Delete R428 engine. The 2.8L CRD EGR valve block off plates are laser cut from 304 Stainless Steel Plate. This plate allows you to block off the EGR flow from the exhaust. This kit is designed for Jeep Liberty 2005 2006 vehicles running the R428 engine. This is usually a in stock item, but can lead time on this item can be up to 2 weeks. All sales are final.