I really enjoyed my M4 Retro Drags. From what I've seen, the Short Meg can scrape pavement in hard leaning turns. That won't happen with the M4, and they sound great. Mine are for sale since I don't have the Busa anymore. Let know if you're interested in saving a bunch of cash.
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dang i wish i had known, i just bought and installed mine last week
tshawn850 said:R your m4's still for sale? If so...do u have pics of the damage? How much?
I would only get a full system regardless of what brand you choose. M-4 is a great looking pipe but does it really have a good racing reputation?. Brock's full system is what they use to race so if you're shopping performance, that is a great choice. Akrapovic also real good I hear. Go for weight loss and look for a nice power curve.