Xe258hr-12 vs Xe258hr-14

[19Walt93]

Why would you pick the one with less lift? Just to be easier on the valve train?

Yes, and to avoid having to check valve to piston clearance,then grind the pistons to increase it.

 

[Tech-man]

Comp Cams has been having quality control issues for the last few years. They were my go to valvetrains for years but I have moved over to Trick Flow Specialties. Check em out, check the google reviews on both also...

 

[O No 3.0!]

I ran the bigger of the 2 years ago in my mustang. Very good cam for stock to "mildly" modded 5.0s. Mine had ported stock heads, demon 650 carb on an rpm air gap intake. This cam was alot faster than the E-303 & the X-303 by a bunch. Low & mid range power were much better. My car had 3.55 gears & went from 83 mph best to 87 mph & 8.32 to 7.72 in the 1/8th. The only negative with it was the lack of lope at idle. The X cam sounded really good, the 258 was barely noticeable. Ive been told that on a fuel injected motor it has a more noticeable lope.