Tried searching and well the question is this , for a 1.3 t/b upgrade its suggested to use the ga15de. I've been offered a t/b but the guy can't remember if it was off a 1.4 ( ga14de ) or a 1.5 ( ga15de ). Is there any definitive way of telling ie stamped etc and would it make any difference ?? As in I know the ga15de is a direct fit and sound upgrade but what about the ga14de ? Many thanks for any input as usual