by GLHS » Fri Dec 07, 2007 2:19 pm
MPG Heads (303-762-8196) in Denver has a CNC program for 12 valvers.
Last I ckecked I think it was around $1500 and I think he told me it was about a 50 hp gain.
It's been a little while and I personally have never used them. I know they have done work for ATS.
92 W250 ext cab, 5spd, SPS 62/71/14, ATS 3 piece, Banks 3G intake, Icebox CAI, DDP #4+, timing 1.95 mm, SB 4 puck FE, PDR fuel pin, Hellmann intercooler, Snow water/meth, 60# springs, stock long block, D80 3.54 w/disks, 455+/1005 uncorrected, 13.34@102 7-06; 472 fuel/520 water/meth uncorrected 5-08