Quote Originally Posted by bluegtp91 View Post
It's like your car is constipated.

Basically.

Anywho...man...just get a 3" DP like teh gai saidz. High flow or not...I'd get one without a converter and just buy an o2 sim with it...that way you never have to worry about it again.
There is no O2 sim for the '04 W-bodies. GM changed the O2 sensor and all my research on that leads to no available O2 sim (to buy or DIY).