All depends what you want your sled to do, if you like cat walking then leave it alone... If you wanna be able to climb then you gotta spend $ to make it right.
Just buy racers edge rear arm... Ice age 163 rails work good, u use the stock Polaris front arm and shock, this will make huge difference from the stock 155.
Boostit has a 13 pro 163 low boost kit running stock rear skid.... It wheelies and struggles in trenches made from other sleds. Pretty...
put areo charger kit on mine and didn't do vent kit....it runs strong ...i just make sure to clean snow off hood vents and headlight delete vent as much as possible...i also didnt want to cut my panels!!
get one...i have both 4 stroke and 2 stroke turbos and they run fast!! they cost $$$ to build them but stock sleds just didnt cut it for the ridding i wanted to do. Main thing is dont cut corners in the build and have somebody that actually rides turbo sleds consistantly build sled for...
first ride on areocharger kit with water to air intercooler was almost perfect, next day we had it running perfect, Boosit-it installed the kit and surprized the sh%t out of me how fast this sled is. I put the new peak 2.5 track on it and seems to work really good,, could deffinatlyy use a 3"...
Re: Is tunnel extension necessary if I want to extend my track f/ 153"-162" in my M10
I would be really worried about the snow flap getting jammed up under tunnel and doing major damage without the tunnel extension....plus i have seen a sled with a longer track than a tunnel without a snowflap...