Aeroflow Bbc Heads 1 X Valve Dual Spring Air These have counter sunk bolt

These have counter sunk bolt holes and the one time use T40 Torx Bit tapered bolt is included and also sold separately (AF463-52)

Part Number: AF200-03-30MBLK

hyundai genesis coupe 2008-2014

2x Factory style rubber embossed aluminum gaskets

We do offer mounting plates to make the job easier

Aeroflow Bbc Heads 1 X Valve Dual Spring Air These have counter sunk boltPart Number: AF59 4273 replacement valve spring. dual valve spring with damper to suit Aeroflow performance 320cc chevy big block cylinderheads. will handle up to0. 850" maximum lift. To suit aggresive hyd roller and solid roller camshafts. outside diameter of outer spring 1. 625". inside diameter of outer spring 0. 880". installed height 2. 08". seat pressure at installed height 275 lbs. maximum lift 0. 850".