08 xp best aftermarket pistons

sewell386

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i am looking for the best aftermarket pistons that i can get for my xp i have a aftermarket intake,reeds,head, pipe and Y pipe any ideas?
 

Sleeper700

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Yeah, I checked on the RK Tek site. The combo head/piston kit looks enticing....
I wonder how much the ECM reprogram affects power/reliability?
 
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