boost is adjustable hp and can be controlled completely by you . turn it up some for fun or down for economy and reliabilty for those daily comutes.. N/A is going to be what ever it is and it takes alot of good bolt ons to add up the power when you can make around 250hp on an ls head and stock internal l/s rods,pistons,crank 450cc injectors chipped and socketed ecu and a good tune.