This week's GPP quickie blog entry tells of a product update announcement. As the older Type RS Blow-off valves get phased out we will now upgraded new incoming Type-RS Blow-off Valve Kits with the most current Type-RZ Blow-off Valve.
Two of the newest are the application specific kits for the CT9A Evolution and the GDB WRX.
So the older part # 11531111 will be replaced with #11531202 CT9A kit with the Type RZ and the older part #11561110 will be replaced with #11561203 GDB kit with the Type RZ.