Realspeed's GT500 Power Pack includes a Steeda 114mm Cold Air Kit with high inlet tube, a 2.7" 3psi supercharger pulley and an SCT XCalibrator 3 programmer to tie it all together in one convenient package. Offers an average horsepower increase of 100hp! Fits 2007, 2008, 2009 GT500 Mustangs 555-3930Regular price: $974.95Sale price: $899.95 Shelby GT500 Test ResultsA pulley change, cold air intake and dyno tune by Realspeed gained 94 horsepower and 75 lb-ft of torque on a 07 Shelby GT500. ShelbyGT500Test Shelby 2010 GT500 Test resultsBaseline run for a 2010 Shelby GT500. 464rwhp/433rwtq on our Mustang Dyno. Custom tune to come soon! Stay Tuned! Shelby2010 www.realspeedauto.com Ph.631-563-7325 All parts listed are for the Ford Mustang unless otherwise noted. Copyright 2018 Realspeed Automotive Inc. All rights reserved.