in the same Boat here, looking for a Christmas gift. $300 - $400 bucks.

looks that most mods run about the same gain in hp. for speed
i am torn between a ECU and sprint booster ... will probably add K&N air filters.

my question is can i buy a ECU already with mod done or does the mod have to be done on my chip.
i would prefer to buy a chip / used chip ect... so i could swap them out as needed...

and what kinda gain will the sprint boost do.
or K&N Filters.
Thanks.