Since when does a filter, pulley, tune, and tires cost "several grand?"
I have almost a grand in tires easy, $8XX and change.
Filter needs a cold air box right? couple H's there.
What kind of tune we talkin? Something off the internet? Or a test and tune with several pulls on a dyno.
You can blow a wad and not even try. Plus there is the burn of claimed increase of HP and "real world" HP.
You really can't see a couple grand in your motor already? Hell I only had this L a week and blew $2000, tires, brakes, full fuilds flush to synthetic, full tune, and three trips to the dyno, for marked improvments, not to mention my Mechanic.
You all may have time to burn turning your wrenches, I have to work for my money, so someone else has to.
Again the point I was trying to get across, is we have no clue what the truck will do as is, and last I checked, money ain't free. So instaed of throwing money at it, just race it, and see. There is no shame in a loss, and it makes it dam sweeter when you correct/overcome the issue for the win.