Use these adapters when upgrading your SAI, N249, PCV or EVAP system on the Mk4 1.8T Install a custom catch can setup or improve the look of your engine bay with braided lines. These simple to install breather adapters are both 10an threaded male outlets. The valve cover fitting replaces the stock valve cover hose adapter. The block breather fitting replaces the factory plastic house on your stock oil cooler housing (just above your oil filter). . Easy, no hassle installation.

CNC Machined from aircraft grade 6061 aluminum.

Compatible with all 06A 1.8T engines found in 2001 , Audi: TT, A4 & 2000 , VW: Golf, GTI, Jetta, Beetle, Passat.