Dinan Stage 2 Performance Engine Software/Boost Upgrade for BMW E82 E88 135i E90 E92 E93 335i (N54)


The software increases water pump speeds as boost pressure increases. Dinan matches the new car warranty coverage for up to 4 years or 50,000 miles, including the possibility of consequential damages. No one offers better performance or backs it up with such comprehensive warranty coverage.

When BMW creates a software update so do we. Dinan will make software available at no charge to keep your car running as well as it possibly can.

The results of Dinan’s tuning is breathtaking, with the added boost and related recalibration producing maximum output of 378 horsepower at 5700 rpm and 415 lb-ft torque at 4300 rpm when the software is combined with the Dinan exhaust, intake, and oil cooler.

Benefits of the Stage 2 Dinan Performance Software Upgrade:

  • Max gain of 30 HP and 38 lb-ft of torque over stage 1 when used in conjunction with the Dinan exhaust, and oil cooler.
  • Top Speed Governor Removed
  • Factory Matching Warranty (4year/50,000 mi)
  • Properly Returned Fuel Mixtures
  • Remapped Water Pump Speeds to control engine temp
  • Oil-Cooler Required

Special Note: 

The BMW stock oil cooler OR the Dinan High Capacity Oil Cooler is required.


  • 2008-2010 BMW 135i E82 Coupe 
  • 2008-2010 BMW 135i E88 Convertible 
  • 2007-2010 BMW 335i E93 Convertible 
  • 2007-2010 BMW 335i & xDrive E92 Coupe 
  • 2007-2010 BMW 335i & xDrive E90 Sedan 
Product Specifications:
Labor Hours/Installation Hours 1.00
Emission Status 50 State Emissions Legal.
California Air Resources Board Executive Order Number D-176-39.
Max HP Gain 74 @ 4300
Max Torque Gain 96 @ 4000
Peak Horsepower 378 @ 5700
Peak Torque 415 @ 4300
Peak HP Gain 49 @ 5700
Peak Torque Gain 91 @ 4300
Factory Rated HP 300 @ 5800
Factory Rated Torque 300 @ 1500
Required Items Oil-Cooler Required.