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View Full Version : stock 107 spec

Supercharged
01-21-2009, 12:46 PM
what is the size of the valves for a stock 107??

my intake is now 27mm wide, how much did i open it up?
X7rocks
01-21-2009, 01:54 PM
stock? 22 20 i think
Blitz$M.Inc.$
01-21-2009, 03:36 PM
its 23/20
the race heads they use on this block has 25/22
X7rocks
01-22-2009, 09:36 AM
ive seen doug use lifan heads on some 107 engines