Originally Posted by TritonX4
Yes, I ended up getting the flex pipe anyways! :D
And yeah I just called FSWERKS again about the tune and I told them that I'm buying the header now just to get the lock in deal with the discounts but within the next couple of weeks I'll be buying the tuner.
He did tell me that if I install the header without the tuner it won't have any problems and it wont cause any harm to the motor, I just need to start using premium gas (minimum 91 octane) and all the tuner will do is just make the performance better and ofc have the sensor disabled and make it work better but until then he told me I can go ahead and install the header it wont cause any harm.
Yet again he's a salesman, but he's from fswerks so idk its not just any salesman to me he's gotta know what he's talking about.
You shouldn't have a problem or hurt the engine by installing the header without a tune. I ran my old zetec focus with an SVT header without a tune until I sold it (4 years). I know of another duratec car that ran for 2 years without a tune on a CAI header exhaust, no issues either. Everyone recommends a tune because that is how you can maximize the performance of your engine, tune it for the exact parts you've added.