[youngmane]

Does anyone know how to increase the horsepower of a 2005 CTS within about a 1,500$ budget?

 

[onephatguy]

Intake and exhaust, best bang for the buck!:welcome:

 

[youngmane]

How much HP can a new exhaust get me, i already have the K and N air filter.

 

[RobertCTS]

How much HP can a new exhaust get me, i already have the K and N air filter.

Look for "The Great Intake Challenge" Thread. They will be testing all the intakes on a dyno. You don't say what engine you have. If a 3.6 the upgrade to the CTS-V exhaust is only about $125 including installation. Several of us have done this mod and are pleased.

 

[Mbai2]

New headers for a 3.6L will also get you a nice increase in output. At the moment, only Cadillac Motorsports run by pietro and Lund Cadillac sell them.

 

[RobertCTS]

New headers for a 3.6L will also get you a nice increase in output. At the moment, only Cadillac Motorsports run by pietro and Lund Cadillac sell them.

The Marine installed the Cadillac MotorSports Shorty Headers and high flow Cats. He plans a dyno run soon. Combined with a good flowing exhaust and mufflers this is supposed to add up to a real nice HP gain. But also pricey.
Here's a pic of the shorties and cats.