What is your primary Pipe size? are you running headers? Did you build them or Buy them? If they are headers I'm sure They are not any bigger then a 1 1/2 Maybe a 1 5/8 tops with a 2 to 2 1/4in collector. Which should have came with maybe a 2 reducer. With the bigger pipes you may have gained a little more top end But would have HURT your low end.
God doesn't like ugly.
