Because of the ECU/Computer that controls the way the engine runs, there's not much you can do in the way of 'bolt-ons' or 'swaps' like those you've mentioned (even including the turbo!) that will really '
improve' things all that much - without upgrading the ECU you'll really only ever get what the ECU in it's standard trim
ALLOWS you to get, and that's pretty much hard coded & largely unchangeable despite getting any better air-flow in or exhaust out! :lecturef_smilie:
That said, these things are
significantly de-tuned by BRP at the factory, so the best bang for your bucks is to
get an ECU Upgrade done! :2thumbs: . A Pedal Box, Power Commander, or any similar 'piggy-back' or 'add-on' type unit &/or UBD applied 'flash' can go
part of the way to getting some sort of real improvement in power/torque, but it's only a band-aid type solution that you might need to remove every time your machine goes in for service or anything at the dealers because it
might cause some warranty arguments - it
shouldn't, but if you don't want to risk the potential argument.... :dontknow:
So your best bet is to
get a 'proper' ECU Upgrade done that literally changes the contents of the ECU box itself in a way that very few dealers &/or BRP themselves will be able to see without making a significant effort to remove, download the content, & then inspect the hard coding in tables & base set-up of your ECU - all they'll be able to see in the normal course of events is that your particular machine runs a helluva lot better'n most!! And that can be done without even exceeding the already established reliability levels used on these same engines in other applications! :thumbup:
By doing that
ECU Upgrade, you can then really take advantage of improving getting air-flow/volume
IN &/or getting Exhaust
OUT improvements that you might also make; but without it, any of those thongs will basically be nothing much more than cosmetic &/or noise generators! :banghead: . But
WITH the
ECU Upgrade, you can use those teamed with the Upgrade to significantly improve the power/torque delivery of your engine,
AND you can do that without exceeding the 'known to be reliable' limits that these same engines run at in other applications! :yes:
Go On, DO IT! You Know You Want To! 
hyea:
Search on
Monster Perfomance or
Wick-It for Spyder/Ryker
ECU Upgrades in North America, or check out
ECU Xtreme (
[email protected]) on my side of the World (IMHO, by far the best!
)
