Ok, so im a new wrx owner. Picked up a 03 wrx with tgv deletes and a prodrive y-pipe. well it was only running around 7psi so i got a tune and it helped out a lot. but I'm only boosting at 10psi now. no vac leaks or boost leaks. discovered i don't have a restrictor pill. I'm assuming that's my problem.
so my question is: if i put a restrictor pill in would i have to get another tune?