I have the exhaust and chip and notice a difference. My wife doesn't like the exhaust but I like the extra power of the chip and exhaust. I don't know if I would put the exhaust on if I didn't have the chip as well. If I remember you have to let the chip people know if you have stock or custom exhaust and they give you the chip that works best for that combination.
Great White North
Canyon Red 2000
You have to grow up to have a mid-life crisis!!!!!
I could play with women or with cars, I find cars are cheaper and you can write a book about cars a guy would understand.