Your buddy is probably talking about mufflers with the single chamber thing. That depends on your taste but single chambers are way too loud for a street car IMO. As stated above long tube headers are worth more, shorties are OK but don't really do much. 1-3/4" primaries are good for most cars unless you plan to add a 'charger later on. Kooks and American Racing Headers are two very good headers but pricey. I have Pacesetters and they are nice and carry a much lower price tag, but they are regular mild steel instead of stainless. I have coated versions and they fit well and are holding up very nicely, but I don't DD my car.
Susquehanna Valley GTOs