they work, the key is the TUNE. I would consider looking into a good V6 tuner to get your tune from instead of just an over the shelf (worthless) tune. Bama chips has a good reputation but no idea how they do on 99-04 V6's
expect 7-10rwhp peak not sure under the curve but probably the same, and this would be on 91-93 octane of course. You wont be picking up any gas mileage in normal driving I dont believe.
2003 Cobra Vert (Redfire) #3938 of 5082 @ 05/27/2003
472rwhp/493rwtq -Modification List
- Dyno Sheet
2012 Mustang 3.7L M6 (Kona Blue)
2011 Ford Edge Sport (Red Metallic)