Just depends on how much they turn up the boostThe Sea Doo GTRs are dam quick
But I also want to see a boosted Spark go up against the GTRs.
And having them custom made by going to a shop you know can get pricey, probably better for a tuning company to do thisif you really wanted to go higher boost you could upgrade the internals of the engine.
but it will be some time before the aftermarket industry starts to pickup and offer more options for engine internals.