Used by top professional engine builders in all forms of racing. The studs make it easier to align the gasket and cylinder head. All studs are heat-treated and feature rolled threads. Fits for M3 with 3.0L S50 Engine 1995 M3 with 3.2L S52 Engine 1996-1999 325 with 2.5L M50 Engine 1992-1995 323 with 2.5L M52 Engine 1996-1999 328 with 2.8L M52 Engine 1996-1999 Size: 11.5 x 1 CM Material: Metal Color: Black Package Contents: 1 x Cylinder Head Studs for Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.