JayCee Full Flow Extension Adapter | CNC-Machined Billet Aluminum The JayCee Full Flow Extension Adapter is a precision CNC-machined billet aluminum extension adapter for full-flow oil system setups on air-cooled Volkswagen engines. Built for Type 1 and Type 4 air-cooled builds. Vehicle Fitment VW Beetle: All years VW Bus: All years VW Karmann Ghia: All years Application: VW Type 1 / Type 4 air-cooled engines Key Features & Benefits Full-Flow Ready: Purpose-built for full-flow oil system setups. CNC-Machined Billet: Precision machined from billet aluminum. Technical Specifications Brand: JayCee Material: CNC-Machined Billet Aluminum Category: Oil System / Full Flow Application: VW Type 1 / Type 4 air-cooled engines Part Numbers: JC-2110-0, JC-2112-0 Frequently Asked Questions What is the Full Flow Extension Adapter used for? It is an extension adapter for full-flow oil system setups on air-cooled Volkswagen engines. What is it made of? It is precision CNC-machined from billet aluminum. Material & ConstructionThis component is machined from solid 6061-T6 billet aluminum rather than cast or stamped from sheet, which is why engine builders trust JayCee oil-system hardware on both street and performance air-cooled VW builds. Tighter tolerances at the sealing surfaces mean fewer weep leaks over time compared to lower-cost stamped alternatives.Installation NotesAlways install with a fresh o-ring or gasket as applicable, torque fasteners evenly in a criss-cross pattern, and re-torque after the first heat cycle. Check for seepage at the sealing surface after the first drive and before every oil change thereafter.As an aftermarket upgrade rather than a reproduction of the stamped-steel factory piece, this JayCee part is built to outlast and outperform the OEM original while remaining a straightforward bolt-on for anyone comfortable with basic hand tools. Explore Related Categories Browse more Oil & Cooling and Engine Parts for the Air-Cooled VW platform. ⚠ Prop 65 WARNING: For more information go to www.P65Warnings.ca.gov.