VMP Tuning - 07-11 Mustang Shelby GT500 Pulley and Custom Tune Upgrade Package for FRPP 2.3L TVS M-6066-SGT This package is for 07-09 GT500s with the TVS and 10+ GT500s with the TVS. If you already have a Ford Racing Performance Parts 2.3L TVS Blower "2007-2009 MUSTANG SVT SUPERCHARGER UPGRADE KIT" M-6066-SGT and are looking for more power, look no further than this upgrade package from VMP. If you already have a Ford Racing Performance Parts 2.3L TVS Blower "2007-2009 MUSTANG SVT SUPERCHARGER UPGRADE KIT" M-6066-SGT and are looking for more power, look no further than this upgrade package from VMP. The supplied Ford Racing Pro-Cal tune is very conservative, it is possible to add 30-40 Rear Wheel HP & TQ with a custom tune. The addition of VMP's stock-look 2.59" upper supercharger pulley can add another 30-40 Rear Wheel HP & TQ. A 90MM replacement idler is included to take up belt slack and improve belt wrap. The FRPP 113MM Intake is adequate for up to ~650 RWHP, you do not need to upgrade it unless you make over 16psi of boost or install a 10% overdrive lower pulley (or upper pulley smaller than 2.5"). We saw no gain going to a 123MM MAF at 16psi and below. The factory dual fuel pumps and 48lb/hr injectors are adequate for up to 650RWHP, you do not need to upgrade them unless you go above 16psi, with the proper tune changes the injector duty cycle is still within a safe 90-95% and pump duty cycle is 85-90%, when you are ready to upgrade we recommend the FRPP 80lb/hr injectors. Our tunes are very safe but still produce excellent power and throttle response. We can tune for ethanol in your local fuel. We can tune for 90,91,92, or 93 octane R+M/2 fuels and foreign 95,98,99 RON octane fuels. Fuel economy tunes with no loss in WOT power are also available. If you change gears or wheels/tires the speedometer corrections is ajustable on our custom SCT X3 Tuner. The SCT X3 Tuner holds up to 3 tunes and saves your current stock tune the first time you use it. Updates to the tune can also be sent via email.