ATS Allison Late Cooler Line Fitting Fits 2003+ 6.6L Duramax

ATS Allison 7/8 Inch Thread Cooler Line Fitting Fits 2001-2002 6.6L Duramax

Allison Cooler Line Fitting, 2001-02 Quick Connect Fitting, 2003-Present 7/8 inch Thread ATS Diesel Performance

Cooler line fitting, Late Allison 2003-Present ATS Diesel Performance