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HAS ANYONE HAD A PCV AND AUTOTUNE INSTALLED ON THERE STOCK SPORTSMAN 850 AND IF so have you had the bike tuned and dynoed to show in real numbers a benifit
 

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Been there, done it. ABSOLUTELY NO GAIN on a stock machine. Even with slip-on and high flow air filter you're looking at about 1HP at best. Only benefit is a little better throttle response.
 
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