Adapter Kit for General Motors 'Pad Mount' A6 & R4 Compressors With 5/8" Pilots to Convert to #8 & #10 Female O Ring Fittings On Compressor. Head/Manifold Orings Included For SELTEC, SANDEN,VALEO and TM Style (0032 / 0269) Compressors as Well As GM A-6, R-4, DA-6, HR-6 and V-5 Manifold Heads.