I personaly think that T3 is al litle bit small for m42 318is , because all the past year i am doing a reaserch because i am going to put a turbo into my 318is... i am going to use a Garrett GT 28/60 , v-mount intercooler , and everything else handmade by me and my friend... ( we are crazy people - we do turbos in our cars - till now we have made 3 cars you will not believe )... for fuel managment i am going to use a " splitsecond additional injector controler for 4 injectors ( it is programmable via laptop , you make a map while you drive ) with handmade intake ,and 4 extra injectors ( it is better than change the factory injectors with bigger and put a chip into the cpu because you can't make changes anytime you want and you can program it yourselve ) , i will put an oil cooler frontmount... hopefully i will begin my project these days , i will take photos of everything and let you know about everything....