is the combination that we run on our Design-Build-Go Grenadier. The trifecta is the DBG Exclusive Kooks Exhaust, IO Pedal Throttle Tuner from Germany and the DBG labeled TDI Tuner from the UK. Combine all of these for premium performance in terms of fuel efficiency, power and acceleration. The tuners are customizable to your driving habits and performance targets. We run ours on the most power setting for the TDI Tuner and sport option on the throttle tuner and that leaves the ability to still be very conservative if driven that way but all the power and responsiveness when that is desired.