Exhaust and tune from Alba is a great start, adding the Alba spacer is defiantly beneficial but keep in mind you might be victim of deceleration pop due to the oem air injection system. A set of aftermarket block off plates will fix that problem and they are very affordable with multiple vendors here on the forum. To save yourself time may I recommend the gytr velocity stacks especially because your already going to have the intake box off, I believe you can grab a complete set for under $100. And lastly I read that you maybe thinking about a set of cams in the future, do your research and weight out your options, Alba cams are great and have a lot of R & D thrown at them, but I would also recommend checking out a set of Yamaha viper cams, they are from Yamahas snowmobile line and drop right in to our vehicles at a fraction of the price, check out partzilla and they’re around $120/ea. And yes Alba Nate has a tune for them and will re-tune your ecu if you decide to add cams in the future.