Well a few of you guys are apparently not schooled in dyno tuning, You can put an exhaust on and get some gains, but until you get your computer remapped( chip rewritten ) you will not get the full gains. Do you think that you can just put in a cam, do some head work and it is going to go like the clappers, chances are it won't run, if it does it will run like a pig.
You don't have change your chip, wat do you think chipping it is, it is a generic programme written onto a chip allowing for certain mods, every motor is different so you will not get the best result from this method. You can have your chip rewritten when on a dyno, do you think the efi cars that are putting out big numbers just got a chip of the shelf, NO..
Unless you have done it and know how it works, don't knock it, i'm giving him advice on previous experiance.
His might only be a v6, but the rules still apply for all motors.
You can take a brand spankers new car off the showroom floor and take it to a good tuner and they will get a power increase out of it.
With the mods you have done SLOW VR, your computer cannot adjust to the mods and that is why your car goes as slow as my 72 year old grandmother..