The best exhaust to get for the outty 400 is the aaen exhuast. I would have gotten one but they didnt have one for the outty 400 when i bought mine. Plus the aaen exhaust gives 2.5 more hp then the biggun exhuast. Here is there web site www.aaenperformance.com The aaen exhuast gives 6 more hp and the biggun exhuast give 3.5 more hp.

 

60mph in an outty 400? I'm pretty surprised... i've never been over 64mph on my 650 max. I know the 400 standard is about 100 lbs lighter than the 600 max ,but still.. thats surprising you get it that fast.

 

actally the can-am outlander 650 goes over 70 mph easily stock. The outlander 650 tp speed is 74mph which i am talking about the standard version. Those outty 400 are surprising for a 400.

 

well. that makes sense..10 mph less than the standard on the max. seems fair. I;ve never held it for a long time at full throttle either so I might be able to squeeze 2-3 more out of it. mine gets to 50 really quick.. then it slowly climbs about 1mph per seccond. then once it hits 60 it climbs even slower. which is why i've never gone over 64. need a good open spot. and theres no way i'd do that on ashfault. you'll melt yer tires.