Product Description
The are a great cam set for those wanting an increase in upper RPM power without regard to low and midrange losses. They require 3.73 to 4.10 gears for the best performance. The idle will be choppy.
Xtreme Energy™ 234/238 Hydraulic Roller Finger Follower Cams for Ford 4.6/5.4L Modular 2 Valve w/ PI Heads Hot Street applications. Needs higher gear ratio, 2200+ stall, Intake and exhaust. Noticeable idle. Computer upgrade recommended. Requires custom tuning. (Not
| Advertised Intake Duration | 270 |
|---|---|
| Advertised Exhaust Duration | 274 |
| Intake Duration at .050 Inch Lift | 234 |
| Exhaust Duration at .050 Inch Lift | 238 |
| Intake Valve Lift | 0.55 |
| Exhaust Valve Lift | 0.55 |
| Lobe Lift Intake | 0.3 |
| Lobe Lift Exhaust | 0.3 |
| Lobe Separation | 113 |
| Intake Centerline | 109 |
| Valve Timing Lift | 0.05 |
e: 1999-Up performance improvement heads)
