Derale 90 Degree Transmission Line Adapter Fitting - 7/8-14 in NPT Male O-Ring to 10 AN Male Swivel - Black 10259C this is a permanent solution

this is a permanent solution that replaces a welded in O2 bung

Restrictors have a

Fits: 1979-93 Mustangs

torsion bars or radius rods

Derale 90 Degree Transmission Line Adapter Fitting - 7/8-14 in NPT Male O-Ring to 10 AN Male Swivel - Black 10259C this is a permanent solutionProduct Description: Adapter 90 Degree 7 8 14 in NPT Male O Ring to 10 AN Male Swivel Aluminum Black Anodized Sold Individually Derale has been the leader in performance cooling for decades. Derale prides themselves in manufacturing high quality, high performance cooling products for O. E. M. and aftermarket applications. Whether you require cooling for the street, strip, track or off road Derale offer a wide variety of products for you.