[Jack_Bauer]

Originally Posted by culver

For their next trick they can explain why this V6 has 12
http://www.members.cox.net/rdgrauman/finiahed2.jpg

(PS, the 2.5L Ford Duratec V6 has 12 for the same reason)
http://www.supercars.net/servlets/PW...esey/4car1.jpg sorry the engine is a bit dirty in this picture

Variable length intake manifolds.

There is a long and a short pipe for each individual cylinder, and the intake switches between the two depending on revs - long pipe for low revs and short pipe for higher revs (I think!).