Earl's NPT Plug (Hex Head) - 1/4" NPT 23-TR1-N Spindle arms have been reamed

Spindle arms have been reamed to a straight hole to accept a 5/8" bolt and rod end

1971-1974 Oldsmobile Cutlass Supreme

1965-1984 Oldsmobile 98

A high pressure digital boost only gauge is also available for diesel or high boost gasoline applications

10 AN Inlet Port

Earl's NPT Plug (Hex Head) - 1/4" NPT 23-TR1-N Spindle arms have been reamedEarl's offers the most complete line of adapter fittings in the industry. In addition to the standard range of AN adapters in both aluminum and steel, over the past 30 years Earl's has designed and manufactured a wide selection of special adapter fittings to meet the needs of the racing industry. These specials include metric to AN, inverted flare to AN and power steering fittings. Product Description: Fitting Plug 1 4 in NPT Hex Head Aluminum Blue