The over all inner diameter is larger on the escape rail but I think the wall thickness is slightly smaller. I'm not sure what your more concerned with. Either will work with 42lb injectors as other's have shown.
1999 3.0L Cougar: 220fwhp and 200tq
2003 VW Passat W8 with 4 Motion AWD
http://www.cardomain.com/ride/300644
PM for intrest in 3L SVT Contours, 3L swaps into your current car, Prepped 3L engines, or anything 3L related.
