Ur playing the hp figures game.
Do some research talk to guys with with tunes. I'm not going to comment what I think as I do have my own opinion.

 

your asking one tuner to make a comment on a forum about another tuners product. even i wouldn't ask markski to do that and he and i disagree about most everything!
what you have to decide is which you tuner your willing to put your trust and car
into their hands. research is your best friend. tuners rarely only tune 1 brand of car. search the other forums which have hi-po cars on them and see what they think of the tuners your considering. most every tune will get you 70 -80 hp over stock. adding more parts and retuning, customer support and how the tuner gets to the end # is where they differ.

 

@Markski So, if I were to go with your stage 4 kit, including all options, would my stock automatic transmission hold up with all that power? And am I correct that everything included it will have somewhere near 630whp? What about if my car has 100,000 miles on it? It runs better than my previous turbo(01 vs 02) and has been well maintained. Are these mods that I can do in my garage or should I find someone here in Ohio to do this? Thanks.

 

Low 600s to the rear wheel is expensive on pump gas but adding race fuel on those special days gets u there with a smaller kit and you save a lot of money.
Yuu need a pressure test and someone qualified in after market installs or shop and or drive the car.
Danny at p3 autocraft knows what's up he's in Ohio.

 

Just a note. Markski is a great tuner and excellent customer service. But don't expect your automatic to hold that much power. Budget for an upgrade if you want more than 500whp. Ask me how I know.