You would have to pick your poison...Are you a world class tuner or keyboard jockey...800cc CATZ have dominated stock class @ Haydays For almost a decade...Not 1 Polaris made the final, and only 2 Ski Doo's since 2015...An XF-800 has held the World Speed Record (118.5) in stock 800 with the NSSR since 2015...Soooo, If people think their sled is fast or their tuning ability is world class they should bring it to a NATIONAL EVENT and run it against REAL TUNERS....BTW...Im on a Ski-Doo currently, so NO dog in the fight....Out of respect to my cat brother's and sisters...I decided to ask this here, I read a lot of Cat guys saying the ctec 8 was competitive with Doo and poos 850's. Has anyone experienced this? I'm my experiences, they wouldn't even hang with our 800's. (Stock trim). Honest question, no dis respect intended, just been thinking about it.