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I've had a dragon and my pro now and put the challenger track on them and I think they climb better especially when you get into a ill harder snow the stock track is terrible goin down hill on a beatin or harder snow the lugs just roll over but in soft fluffy snow not a really big diff but still...

every sled ive owned i ran them hard and tight and never had a engine prob except for my pro it still a dog

do you sell them and how much does it up the comp and power and do you change the whole head or is there just domes in the new ones i havent tore into a sled motor since i moded out my gen ll a long time ago and is there anything else i could do to my pro to make it run/climb better its stock...

hi i have a 2012 800 pro love the handling but dont think it climbs any better than my 2009 dragon def dont have the power my dragon hung right with my buddy with a new rev tec and my i fig a new pro would out do him but it wont and help would be good

hey chrisco this is dan i was reading one of your older post and seen that you said to put heads on a 2012 pro for more power do you have to do anything to the fuel system or can you just put them on and run it anywhere