Originally Posted by xrsfx
Straight pipes without any cats will give you a lot of hp but they are loud & illegal..
With the cats you'll still get the loudness just not as much hp
Not really, even an entire cat back system and Off road X pipes yield very little gains on stock V6 cars. Although headers will help power noticeable.
The main reason why people do exhaust is for sound. Unless you have forced induction or N20 the stock exhaust just isn't really a restriction. Similar to the Intake on these cars.
Ford actually did a really good job designing the intake and exhaust on the V6 cars to where aftermarket parts yield little to no gains.