Header bracket is made from heat treated .250" billet alum. but there are no provisions for the pin. Racer would have to make some tabs and weld them on to the brackets to be functional They are made to be used with virtually any engine and have plenty of material to mount to the exhaust mounting studs. Designed to be used with a 9/16" diameter pin. We have two brackets and one pin so grab it before it is gone. Edge to edge of the bracket is 3.520" where the pin slides thru. Pin is .562" diameter alum. with a quick pull pin design mounted to a small lightweight cable. Buyer gets both brackets and the one pin in the picture for $20.00.