What do our cars sound like with headers and does a high flow cat really make a difference? thanks.

As I pulled up into the parking lot at work mid-morning today, two co-workers (who have seen the car, but apparently haven't heard it before) asked for a look under the hood. "Sure sounds good," these Mustang owners said.

"Oh, just a 305. Wow. Looks stock, but I see you have headers."

"Sure sounds good."

I don't know how much difference the headers & cat made, because it all went on at the same time.

Muffler's got to be a big part of it, though.

Headers and hi flo cat help a lot.

I know my hi-flo cat made my car louder now I can't wait to get my headers on