Stertman Motorsport ECU Software Upgrade For Audi S4/S5 3.0T (B9)

Stertman Motorsport

We are pleased to offer Stertman Motorsport performance software for your B9 S4/S5. With over 20 years of experience in tuning VAG & BMW platforms, along with advanced development and diagnostics equipment, Stertman Motorsport is one of the premier software tuners in the world. Each tune is developed and rigorously tested in house, both in a controlled dyno environment as well as on rolling roads.

Stock Power: 354 HP / 368 TQ

STM Stage 1: 405 HP / 450 TQ

STM Stage 2: 420 HP / 465 TQ

STM Stage 2+: 430 HP / 472 TQ

STM Stage 3: 520+ HP / 500+ TQ

Stage 1 tuning is for vehicles that are otherwise stock, or with basic modifications such as air intake or catback exhaust.

Stage 2 tuning requires a decat or high flow downpipe, along with upgraded intake or air filter.

Stage 2+ tuning requires the above as well as upgraded intercooler.

Stage 3 tuning requires the above as well as an upgraded turbocharger such as Turbo Systems hybrid.

Numbers quoted are for 91-93 octane pump fuel. Higher numbers are attainable with better fueling, as shown on the dyno sheets below.

This is a complete ECU software upgrade, which will write modified tables for load, fuel, ignition, boost pressure and more. At this time, your ECU must be sent in to our facilities for tuning, or you can make an appointment to bring the vehicle to our location for tuning. Typical turnaround on send-in ECU's is 1 business day.