Description MRG915 by MR. GASKET Header Bolt, 3/8-16 in Thread, 0.750 in Long, Hex Head, Steel, Black Oxide, AMC V8 / GM V8 / Mopar B / RB-Series, Set of 12 HEX HEAD HEADER BOLTS Grade 5 Bolts have smaller 3/8″ or 7/16″ hex heads for easier header installation, especially in tight places. Washer-faced bolts have protective black finish
