In 2008, Roush broke away from its typical approach of simply bolting a supercharger onto an existing engine by unveiling the Roush Performance P-51A Mustang. This marked a significant shift as it stood as the most potent Mustang the company had ever produced up to that point. It also represented the first instance where their technicians, headquartered in Livonia, Michigan, delved into internal engine upgrades.
The upgrades to Ford’s 4.6L SOHC three-valve engine included the installation of a forged-steel eight-bolt crankshaft, forged aluminum pistons with an increased dish to lower compression from 9:8 to 8:6, and forged-steel H-Beam connecting rods.
These modifications were crucial to managing the extra power generated by the revamped supercharging system for 2008. The outcome was an impressive output of 510 HP and 510 lb-ft of torque, leading to the refinement of suspension and braking systems to optimize handling as part of the P-51A package.
Key features of the P-51A include a ROUSHcharger kit, a 6-speed transmission, power steering, four-wheel disc brakes, forged Roush five-spoke wheels wrapped in G-Force T/A radials, and a Roush aero body kit.
Photo Source: Cars & Bids
