I had a Magnaflow cat and resonator. Nice deep throaty sound. If i had to recommend a system it would be borla or trubendz. both great and heard car with both. not sure of the added hp.

05 Chevy Colorado z71 4x4 *for sale* 97 Honda Accord 4door track whore *12.9 N/A* (blown and wrecked) 97 Honda Accord 4 door 03 Eclipse GS