just thought i had. i have a td04 on my glanza its running 235bhp at the fly and 198 at the wheels and i have not had any problem with the at all and it still on standard interals. the standard internal will take 250bhp all day long but you can push them up to 300mbhp have seen this done. they will take it but they will not lasted very long. 250bhp the max if you use the car all day long and every day. i would say not to go over 1 bar of boost you can push the boost up to 1.3 but i would say stay to 1 or 1.1 bar any more you are asking for troble on standard internals. the gear box i told is good for 350bhp before you have to think of getting any thing done to it. i hope this helps alot of people out. of might had make sure you have the right mods for the horse ower you are going to run. put it this way wrong mod engine goes bang!!!! right mods engine will love you. make sure you service and change your engine oil every 3 to 4 months if you can this will keep the car healthy. i use 10/40. gear box 75/90