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Foosh · 12-17-2009, 01:56 PM

For those guys with the 4.2, i did some reading a while back... If you take the head off the 4.0 and put it on the 4.2 it yeilds something like 30-40 hp gain w/o porting.

12-17-2009, 01:56 PM	#45
Foosh Join Date: Oct 2009 Location: Red Bank Area,NJ Posts: 216 iTrader: (0)	For those guys with the 4.2, i did some reading a while back... If you take the head off the 4.0 and put it on the 4.2 it yeilds something like 30-40 hp gain w/o porting.