Original: $6,599.99
-65%$6,599.99
$2,310.00The Story
Replace or upgrade the factory Saleen S281 Mustang supercharger with the Saleen-approved replacement system for the 1999–2004 Mustang GT. Engineered for the 4.6L 2-valve modular V8, this system delivers significant performance gains with OEM-level drivability and reliability. It is the recommended OE replacement for Saleen S281 models originally equipped with the 2.1 twin-screw unit, while fitting all 1999–2004 Mustangs with the 4.6L 2V engine.
Power gains range from +160 RWHP at 9 PSI to as much as +262 RWHP at 14 PSI, transforming the Mustang GT into a true Saleen-level performer. The kit includes an intercooled twin-screw supercharger, Boost-a-Pump, fuel injectors, billet fuel rails, bypass valve, and chip calibration. Saleen’s proprietary calibration provides OEM-grade tuning, ensuring smooth operation and consistent performance without the need for expensive custom tuning.
Two fitment configurations are available: one for 1999–2000 Mustang GT models and one for 2001–2004 Mustang GT. Both versions feature a self-contained oiling system, instant boost delivery, and quiet operation, all hallmarks of the proven Kenne Bell twin-screw design. The intercooled design maximizes efficiency, lowers intake temperatures, and provides reliable power across the entire RPM range.
- Recommended OE replacement for 1999–2004 Saleen S281 Mustang supercharger
- Fits all 1999–2004 Ford Mustang GT 4.6L 2V (two configurations: 1999–2000 or 2001–2004)
- +160 RWHP at 9 PSI, +204 RWHP at 10 PSI, +262 RWHP at 14 PSI
- Intercooled twin-screw design for maximum efficiency
- Includes Boost-a-Pump, injectors, billet fuel rails, bypass valve, and chip calibration
- Self-contained oiling system for long service life
- Instant boost with flat torque curve across the RPM range
- 50-state legal up to 9–10 PSI (14 PSI kits not emissions legal)
- Direct bolt-on system, no internal engine modifications required
| Model Years | Engine | Boost Options | RWHP Gains | Emissions |
|---|---|---|---|---|
| 1999–2000 | 4.6L 2V | 9–14 PSI | +160 to +262 RWHP | 50-state legal up to 10 PSI |
| 2001–2004 | 4.6L 2V | 9–14 PSI | +160 to +262 RWHP | 50-state legal up to 10 PSI |
Note: Professional installation and premium fuel (91–93 octane) required. Horsepower results may vary by conditions, altitude, and dyno type.
Description
Replace or upgrade the factory Saleen S281 Mustang supercharger with the Saleen-approved replacement system for the 1999–2004 Mustang GT. Engineered for the 4.6L 2-valve modular V8, this system delivers significant performance gains with OEM-level drivability and reliability. It is the recommended OE replacement for Saleen S281 models originally equipped with the 2.1 twin-screw unit, while fitting all 1999–2004 Mustangs with the 4.6L 2V engine.
Power gains range from +160 RWHP at 9 PSI to as much as +262 RWHP at 14 PSI, transforming the Mustang GT into a true Saleen-level performer. The kit includes an intercooled twin-screw supercharger, Boost-a-Pump, fuel injectors, billet fuel rails, bypass valve, and chip calibration. Saleen’s proprietary calibration provides OEM-grade tuning, ensuring smooth operation and consistent performance without the need for expensive custom tuning.
Two fitment configurations are available: one for 1999–2000 Mustang GT models and one for 2001–2004 Mustang GT. Both versions feature a self-contained oiling system, instant boost delivery, and quiet operation, all hallmarks of the proven Kenne Bell twin-screw design. The intercooled design maximizes efficiency, lowers intake temperatures, and provides reliable power across the entire RPM range.
- Recommended OE replacement for 1999–2004 Saleen S281 Mustang supercharger
- Fits all 1999–2004 Ford Mustang GT 4.6L 2V (two configurations: 1999–2000 or 2001–2004)
- +160 RWHP at 9 PSI, +204 RWHP at 10 PSI, +262 RWHP at 14 PSI
- Intercooled twin-screw design for maximum efficiency
- Includes Boost-a-Pump, injectors, billet fuel rails, bypass valve, and chip calibration
- Self-contained oiling system for long service life
- Instant boost with flat torque curve across the RPM range
- 50-state legal up to 9–10 PSI (14 PSI kits not emissions legal)
- Direct bolt-on system, no internal engine modifications required
| Model Years | Engine | Boost Options | RWHP Gains | Emissions |
|---|---|---|---|---|
| 1999–2000 | 4.6L 2V | 9–14 PSI | +160 to +262 RWHP | 50-state legal up to 10 PSI |
| 2001–2004 | 4.6L 2V | 9–14 PSI | +160 to +262 RWHP | 50-state legal up to 10 PSI |
Note: Professional installation and premium fuel (91–93 octane) required. Horsepower results may vary by conditions, altitude, and dyno type.
