For a VCM-13 or VCM-16 you will require PAC-650 Valve Springs (upgrade is additional charge). Vt vx vy vz holden commodore & hsv v8 ls1 cam package vcm camshaft grind pack 1 everything you need for a complete ls1 camshaft package. Our Camshafts are crafted using the highest quality US Billets, and suit the GM LS1, LS2, L76, L98 and LS3 Engines.