I have a 2010 Chevy Impala LT 3.5L V6. I am It is currently stock but I am adding a Magnaflow Cat Back Exhaust system.

I am wanting to add horsepower but not pay out a lot of money. I have heard a lot about performance chips, re-programming thew computer, cold air intakes, and headers. Which ones really help get some significant horsepower but that won't cost a fortune? Also ones that will not wreck the rest of the computer or cause mechanical issues.

Thank you. I appreciate any help you can give!

 

Installing cat back exhaust systems is a good idea as they have large diameters and smoother bends.But the exhaust note increases with faster moving air. Consider installing after market air intakes as these are more common and better way of improving horsepower.