Quick view Garrett -4 size Oil Inlet Fitting with Built-In .035 Restrictor for Garrett Ball Bearing Turbos Product Description: -4 (-4AN) Size oil inlet restrictor fitting (0.035" orifice / hole size) for Garrett GT and GTX Ball Bearing Turbochargers. Output is -4AN male flare. High durability and reusable Stainless Steel material. Use... kn91,02