Quote:

Does the old way for collectors still work? Mark them with cheap paint or crayon and cut them where it stops burning off?



NO... you would have to have a perfect tune for that
to even be close... I know many guys say that it works
but in reality its not close... for instance, if you
are running fat do you think it would burn in the same
place as if you were running lean... no way... headers
are a mathematical and sound wave function