RACING PERFORMANCE Roadrunner converters custom matches every performance converters to the customers needs and vehicle. These are not the cheap modified OEM converters. All strip converters feature billet steel front covers and stator options to match your needs with the ultimate high performance converter to handle up to 1500 H.P. 9" 3000 - 5500 RPM stall starting at $600.00 with trans brake starting at $750.00 8" 4000 - 6500 RPM stall starting at $800.00