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i saw a JE piston going for 70 bux but is 105mm..i have all stock internals except for a stage 1 hot cams (not installed)i have std piston on my rappy and the guy states that this will make my rappy a 727 is this true? can i go with this piston with stock internals? thanks
 

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for a 105 mm to fit in your motor you'll need a new sleeve=$100, and about $350-$400 worth of machine work. not to mention all of your other motor componenets will have to be matched.....They don't have to, but then you defeat the purpose.....
 

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If its a 102mm it may be worth looking into. as long as its not the 10.75:1 series.
 

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stay away from je for raptor pistons, as far as i know all of the raptor pistons je makes have a major flaw in design. the wrist pin is located to close to the ring lands and the fail because of that. go with cp or wiseco
 

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I had a stock bore 10.75:1 JE and decided to replace with 102mm Wiseco 11:1 figured what the heck, may as well bigger too. With the porting etc, it makes a NOTICABLE diff.
 
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