kenny d... define big plans
saabaholic... you are talking about EL (equal-length) headers, as they move powerband higher in rpms. my dyno graphs show a gain of 18TRQ to the wheels with just the borla header. yes, the stock header is UEL, but a crappy version of one. definitely get the borla header. it's worth the price.
dyno...
http://xcceleration.com/imp-gallery-...back.25.na.htm