I'd say this guy has it down from the Modular Depot... Mach in the 12s "2003 Mustang Mach 1 Stock with a Prochamber H pipe 12.609 @ 108.61 on Nitto DR's. Best mph 109.16 304 rwhp and 333 rwtq" 12.60 @ 108.61 In-Car video
12.976@104.81 60 ft time on run was 1.769 4.10s SLP cat back Steeda cai Lakewood drag struts PHP Intake spacer Nitto Drag Radials