Mini 3/8" head header bolts have a smaller head size, to provide additional clearance, making header bolt installation and removal easier. Grade 5 bolts heat treated for extra strength. Another time-saving product from Trans-Dapt Performance.
 
Part # ProductCollector StyleCapacityEngineExhaust System DiaFinishHead StyleMaterial Media
8885 HEADER BOLTS; Miniature Head; 3/8"-16 x 3/4" (12 bolts)
Photo
$3.77
 
http://hedman.com/images/ePIM/original/8885-H.jpg