All A'PEXi camshafts are precision engineered on CAD systems delivering unparalleled performance. All cams are designed for competition high horsepower output. Few companies possess the technology to develop high quality cams. The GT camshafts have been primarily developed for optimal matching with our AX turbo series or comparable sized turbo. The VMAX SPL series are an aggressive camshaft lineup made for the RB26DETT Skyline GTR engine. These camshafts have already proven themselves on our 8 second 1100HP V-MAX test car..