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XFI XE-R 224/230 Hydraulic Roller Cam for GM LS GEN III/IV; High RPM street/strip with XE-R lobe designs. Requires custom tuning.

XFI XE-R 232/234 Hydraulic Roller Cam for GM LS GEN III/IV; Xtreme Energy XE-R design for standard displacement LS6 and LS1.

XFI XE-R 238/240 Hydraulic Roller Cam for GM LS GEN III/IV; Xtreme Energy XE-R design for large cubic inch LS6 and LS1.

XE-R S-Charged/N2O 222/224 Hydraulic Roller Cams Ford 4.6/5.4/5.8 Modular 4-V; Street performance with excellent torque. Works well in supercharged or nitrous engines. Requires custom tuning.

Xtreme XE-R 226/224 Hydraulic Roller Cams for Ford 4.6/5.4/5.8L Modular 4 Valve; Street performance with excellent torque in normally aspirated engines. Requires custom tuning. Noticeable idle.

XE-R S-Charged/N2O 230/232 Hydraulic Roller Cams Ford 4.6/5.4/5.8 Modular 4-V; Serious street effort for supercharged or nitrous applications. Requires custom tuning and lower gears. Automatics will require a 2000+ stall. Mild rough idle.

Xtreme XE-R 234/232 Hydraulic Roller Cams for Ford 4.6/5.4/5.8L Modular 4 Valve; Hot performance cams with serious horsepower and torque gains. Recommended lower gears, requires custom tuning, larger throttle body, mass air, injectors and exhaust upgrades. Automatics use a 2200+ stall. Features a rough idle.

XE-R S-Charged/N2O 238/240 Hydraulic Roller Cams Ford 4.6/5.4/5.8 Modular 4-V; Max strip and street cams for centrifugal supercharged or nitrous engines. Large gains in power with larger throttle body, mass air, injectors and exhaust upgrades. Requires lower gears and custom tuning. Use a 2500+ stall. Rough idle.

Xtreme XE-R 242/240 Hydraulic Roller Cams for Ford 4.6/5.4/5.8L Modular 4 Valve; Race or limited street use. Cams require a larger throttle body, mass air, injectors, exhaust upgrades and requires custom tuning. Automatics need a 3000+ stall. Very rough idle.