Xtreme RPM 230/230 Hydraulic Roller Finger Follower Cams for Ford 4.6/5.4/5.8L Modular 4 Valve Xtreme RPM 230/230 Hydraulic Roller Finger Follower Finger Follower. Serious street effort with maximum power gains in mid to upper RPMs. Requires lower Gear ratios. Automatic cars need a 2000+ stall. Mildly rough idle. Requires computer modifications/custom tuning.
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