Fabspeed Porsche 993 Turbo ECU Software Upgrade (FS.POR.993T.ECUOTP) 1642 These replacement rear diffuser panels

These replacement rear diffuser panels are designed to remove the factory fiberglass fins and replace with high quality and extremely durable poly-urethane

Designed for use on closed top air filters only

that is recommended at every stage of performance

(1) muffler (Part Number M-PO970R)

Fabspeed Porsche 993 Turbo ECU Software Upgrade (FS.POR.993T.ECUOTP) 1642 These replacement rear diffuser panelsPerformance ECU software upgrade improves horsepower, torque, and driving characteristics by reprogramming various sensor inputs, air fuel ratios, and boost pressure (if applicable). NOTE: ECU upgrades are available for all 993 Turbo models, but you must specify which style of ECU your vehicle requires. Early model 993 Turbo (1995) use an ECU EProm Flash, while the later cars equipped with the "drive block" feature (1996 1997. 5) use an OTP style ECU.