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2003 Cadillac CTS Base 4dr Sedan

2003 Cadillac CTS
Trim Info:
Rear Wheel Drive, 4 Door Sedan, Mid-Size
19 mpg city / 26 mpg hwy
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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?


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