Originally Posted by Friendly_Zombie
Figure I'd ask this here instead of starting another thread. Can you get any power increase from just an AP or do you need something in the way of intake or exhaust upgrades?
Stage 1 - aka just a tune, should give a slight power increase. A custom tune (e-tune, dyno, whatever) should give you more power than an OTS (off-the-shelf tune). Mostly this is am improvement in drive ability. I.e. the car just responds smoother / better. Any additional power is almost a side effect.
Stage 2 - aka downpipe and tune, is generally seen as the best bang for your buck power mods. Downside is depending where you live might need to go back to the OEM downpipe just for smog.
Stage 2 is a fun place to be. With the VF40 / 46 you get a pretty decent torque hit really early in the RPM range.
Stage 1 is just the gateway to Stage 2. A place to stop briefly and waste money - at least in my experience.
Originally Posted by xt2005bonbon
Remember: no intake upgrade without a tune!
OP has a 3.0. not the 2.5XT, I honestly don't know anything about those engines. Do they still need a tune for just an intake (like our turbo's do)?