I installed the DINAN engine software and the transmission software and can tell a big difference. It's not real expensive, but for what you pay, it's worth it. The engine software is $399 and the transmission software is $349. I got 15% off of both of mine. I love it so far..........gives that extra punch!

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Sold - 2002 X5 3.0i - Steel Gray Metallic/Gray Interior
Mods: DINAN Stage 1 Engine Software; DINAN Stage 1 Transmission Software/OEM 87's!! /OEM Titanium Grill /OEM Chrome Exhaust Tips/OEM White Sidemarkers/OEM White Tail Lights/OEM White 3rd Brake Light/OEM Rubber Floor Mats/OEM Titanium Liftgate Handle/'06 Sport Steering Wheel

2005 Mercedes Benz ML350 Special Edition
2007 Mercedes Benz C230 Sport (for work)
1989 Ford Mustang GT (all original w/80k miles) my TOY!