So currently I have a Steeda CAI and O/R H pipe and I'm wondering how big of a difference I'm going to feel after I order a SCT tuner? How noticeable is this? And is this worth $380?

 

A tuner/tune will pay for itself. It not only makes the car feel completely new, it also allows you to read/clear codes. With a custom tune, you are going to get instant throttle response, increased low end torque, more top end HP, and equal if not better MPG at light throttle. The tunes is an essential mod if you plan to to additional mods in the future as well.

 

It's totally worth 380. Words do not describe how awesome a tune makes the car.

 

Are you implying that you're running the Steeda CAI and the O/R H without a tune? I can't believe you haven't thrown CELs yet; lean code for the CAI and another for the O2 sensors. Running lean is harmful, too.

A stand-alone CAI won't do squat on these engines; 4-6 RWHP if you're lucky. A CAI & tune combo (with custom tunes from the right vendor) will change the feel of the car totally, especially if you have an auto. Expect 15-25 or more RWHP gains.

 

Well when I bought the car it had the CAI on it and they say it had a flash tuner chip so idk, If it has a tune or not on it. IF it already has a tune and I buy a tuner am I gonna have to get my ECU flashed?

 

I hope so. I just placed an order for your tune on a stock 08 GT. Hopefully I'll see some gains on an otherwise stock car.

 

The purpose of the tuner is to reflash the PCM, providing you bought a tune pre-loaded in the tuner or buy via e-mail and load them yourself into the tuner. You can't "tune" the car on our own just with the handheld tuner; you need a shop (i.e., Brenspeed, Bama, VMP) to write custom tunes for you. But you may need to find out if the previous owner returned the tune to stock. If not, you have a fly in the ointment with regard to changing the tune. I'd contact Brenspeed tech guys and check with them.

EDIT: Looks like we posted at the same time. I still recommend you call Brenspeed and inform them that you may have an existing non-stock tune.

 

So am I screwed if it is already tuned and I cant find out if it was retuned to stock or not?

 

I called brenspeed and they said it will just save the tune that's on my car now as the stock tune. And then i can tune it just as normal. God I love brenspeed they are so helpful.

 

Excellent. And I agree about Brenspeed. Although you should feel some gain, it may not be all THAT much since you appear to currently have a canned tune. I'd drive the car like a raped ape before you load the new tune, then do the same after you load it, just so you can get a good comparison. Enjoy!