VW MK4 1.9 TDI Tunes (ALH)

The ALH is the 1.9 liter TDI in the MK4 Jetta, Golf and New Beetle, the rotary-pump diesel famous for economy and durability. Stock 90 hp and 155 lb-ft. A diesel tune transforms it. Expect big torque gains and better drivability on the stock turbo, and far more on a hybrid turbo.