they should be very good now,but back in the day they had major probs,with them lasting,the output shaft was too long and brok,but as fare as i know the warrenty is good they all got new chargers within the garenti.havend heard much abut probs theese days,it´s been maybe 6 years or so since then,they where all the rave back in the 1990 the where put in every thing here in dk,mostly insted off the G-kompressor in the g60,and wee have alot off kits for mrk.2-3 1.8-1.8GTI,16V,and acouple off 1.6, the stage one price is 26000DKR thats roughly 2400pounds thats abit more then the votech kit.