Hydraulic Roller - XFI XE-R: Xtreme Energy XE-R design for standard displacement LS6 and LS1. Race only applications. Custom tuning required. COMP Cams XFI XE-R XER281HR-12 Camshaft for LS Gen...
SOHC - Xtreme Energy: Mild Street performance, 3.23-3.55 gears. Good torque and power, noticeable idle. Requires custom tuning. COMP Cams Xtreme Energy 268H-14 Camshaft Set for 4.6L and 5.4L SOHC...