I really am not a fan of the pypes. I heard them in person the other day for the first time and they didn't sound bad, but just weren't what I consider a classic muscle car sound. I just got MAC axle backs and a custom H-pipe and it is great. I also want a fan if the flow masters in person.
2003 Lamborghini Murcielago
2007 V6 Mustang (manual), Hurst/FR short throw, MAC dual exhaust, custom H-pipe, chin spoiler, GT front bumper, billet aluminum grill, GT500 rear bumper, GT500 wing, FR windshield banner, FR strut tower brace, LED interior lights, sequential taillights, FR side markers, slotted and drilled brakes, 93 Cobra teal painted (and cleared) stripes, etc.