Saleen S281 Mustang: The Story Behind the 4.6-Liter Supercharged Powerplant

Exploring the Engineering, Performance, and Legacy of Saleen’s Twin-Screw V8

The Saleen S281 stands as a milestone in Mustang performance, blending Ford’s modular 4.6-liter V8 with Saleen’s superior engineering. From 1996 to 2010, Saleen offered both naturally aspirated and supercharged S281 variants, each unique for its balance of street usability, performance, and rarity.

At the heart of the S281 is a 4.6-liter (281 cubic inch) 90-degree modular V8. In the naturally aspirated S281 3-Valve, power ranged between 320–330 horsepower, while the supercharged S281SC variant delivered approximately 350–375 horsepower at the flywheel. Period tests, such as those from Car & Driver, confirmed these figures with impressive acceleration. Torque figures were equally robust: the base S281 produced around 340 lb-ft, while the S281SC generated between 400–415 lb-ft of torque, giving the supercharged model exceptional mid-range pull that rivaled even the powerful Shelby GT500s of the era.

What truly set the S281SC apart was Saleen’s proprietary twin-screw “Series IV” supercharger. This advanced design, more efficient and responsive than older roots-style blowers, produced about six pounds of boost with minimal lag and strong, linear power delivery. Complementing the supercharger was a dedicated intercooler that significantly reduced charge air temperatures, enhancing reliability and consistent performance. The system was fine-tuned through Saleen’s in-house Powerflash ECU calibration, which adjusted fuel, ignition timing, and EGR parameters to ensure optimal power and drivability.

Saleen also upgraded the intake and exhaust systems with a high-flow intake and 2.5-inch stainless steel exhaust, maximizing airflow and delivering a distinctive, aggressive exhaust note. Beyond the engine, Saleen enhanced the S281SC’s handling by fitting Racecraft suspension components, including firmer dampers, stiffer springs, and upgraded sway bars. Bigger brakes and signature Saleen wheels improved stopping power and road holding, while unique aerodynamic elements like the heat extractor hood, front splitters, and side skirts optimized airflow and cooling.

The S281 badge first appeared in 1996 as a tribute to Ford’s 281 cubic inch V8, evolving alongside the Mustang from the SN95 to the New Edge body style in 1999. Saleen introduced the supercharged S281SC in the late 1990s to give Mustang enthusiasts a factory-engineered, forced-induction alternative to Shelby and Roush offerings. By pairing strong midrange torque with an approachable, street-friendly character, Saleen created a Mustang variant that appealed to drivers wanting serious performance without sacrificing everyday usability.

The S281SC also carried historical significance as the final high-performance model on the New Edge Mustang platform. The 2004 model year marked the end of this design era, making the S281SC a swan song for Saleen’s mastery of the third-generation Mustang. It was the last iteration before the platform shift to the S197 chassis, cementing its place in Mustang history.

Production numbers of the S281SC were extremely limited, adding to its collectability. On average, Saleen produced roughly 25 S281SC coupes and 5 convertibles per year in the early 2000s, making each example a rare find. Across Saleen’s total Mustang output between 1983 and 2009—estimated at over 8,000 units—the S281SC represents one of the rarest and most sought-after models among collectors.

Owners of the S281SC often describe a driving experience marked by instant throttle response and relentless midrange power thanks to the twin-screw supercharger. The engine delivers a smooth yet aggressive surge that makes highway acceleration effortless. Meanwhile, the chassis upgrades create a stable, planted feel through corners, with braking performance to match. Compared to the Shelby GT500s of the same period, many drivers found the S281SC offered a more refined and balanced ride, with Saleen’s focused engineering resulting in a car that excelled both on the street and track.

The legacy of the S281SC lies in its embodiment of Saleen’s evolution from aftermarket tuner to low-volume OEM. By the early 2000s, Saleen was designing, engineering, assembling, and calibrating its cars in-house, achieving a level of fit and finish that rivaled major manufacturers. This dedication to quality and performance made the S281SC not just a modified Mustang, but a thoroughly re-engineered vehicle with distinct character and impressive capability.

Overall, the Saleen S281SC stands as a rare blend of supercharged modular V8 power—producing between 350 and 375 horsepower with torque near 400 lb-ft—combined with exceptional engineering and exclusive styling. Its limited production numbers, refined performance, and status as the final chapter of the New Edge Mustang era make it one of the most desirable modern Mustangs ever built. For enthusiasts and collectors, the S281SC remains a shining example of what happens when a visionary performance company partners with an iconic American pony car.