Need Help?

2003 Cadillac CTS Base 4dr Sedan

Trim Info:

Rear Wheel Drive, 4 Door Sedan, Mid-Size
19 mpg city / 26 mpg hwy

Other Trims

Do you own this car?

Estimated Mileage
Miles

Enter current mileage for most
accurate info about this vehicle

Track Your Service Records

Get Recall Alerts

Get Updated Value Estimates on Your Car.

back to question list

Ask Our Mechanics

Ask The Community

December 18, 2009, 6:25 pm

Keith C

Question: How can I increase the horsepower on my car?

I have the 3.6 liter engine. I have gone from 2 inch to 2.5 inch pipe from the catalytic converters back and have replaced the stock mufflers with magnaflow's> I have also replaced the stock air filter with a K&N filter> is there anything else that can be done without changingthe intenal parts?

My Auto Score

See the free AutoCheck score

Ask a Certified Mechanic

Need car repair help? Ask a question to an auto mechanic for free.

Tips on Servicing

Car Brakes: How Do You Know When to Change Them?

By Zach Bowman For those who suffer a daily commute through heavy traffic, your vehicle's braking system can bring thousands of pounds of metal, plastic and empty Starbucks cups to a stop hundreds of times before you get to work. It goes without saying that these pieces wear out, but they do so slowly, meaning you may not notice they need attention until ...