I'd seen that before. I agree, the number ARE impressive. They still use pushrods from the regular cam and they have 2 shaft mounted rockers, one for intake, one for exhaust. The single pushrod then opens 2 intake or exhaust valves at a time.
With all that valve spring pressure, you have to have a ROLLER valve train (cam, lifters etc.) in addition to extra strong pushrods. It must be nice to have deep pockets for this good stuff. 
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Fiero Fiesta - August 1, 2004 - Calgary, Alberta <--- click this LINK
3.4L S/C 87 GT www.fierosound.com
2002/2003/2003 World of Wheels Winner &
Multiple IASCA Stereo Award Winner
