First of all you said its a 2D with 2.0L engine (not stock one) so I asume the new engine is also diesel. Could a diesel engine 2000 cc (even if made by Pratt & Whitney......though they dont) out run some nice gasoline cars out there???
Sunroof, vinyls etc have nothing to do with the performance as far as i understand.
Thirdly "Kawa Challa Hans ki Chaal......." Corolla will remain corolla even if you put S600 name plate on it.
Overall I will say that its a nice attempt at modification, however as regards the claim of being fastest, i will take it with a pinch of salt.