Is a performance D15 possible in a Sedan

I was untill a few days ago not a fan of building a big engine till i saw this 4g civic sedan flog a Commodore at the lights and made the commy look like a fool. So any ways is it at all possible to make my D15 better or should a just got for a full swap?

Thanks dudes

I seriously doubt that 4g civic sedan had a d15 unless it was turbo or something. But I'm not too familiar with "flog" does that mean beat him by 1 car length, 2 car lengths, off the line, had him all the way, etc.?

nah there was no way that that civic had a d15 in it its was real done up, i thought it was just a nice looker till it really pulled away quickly and then dissapeared into the distance. Flog umm it really left the other car by bout 2/3 car lengths i think. not really sure but i want a better engine now!