Originally Posted by redrex009
So what are the internal motor differences? Or is it all suspesion tranny brakes bigger intercooler etc.
The short blocks are 100% identical. The STi has better pistons and substantially improved heads, but they're still not forged. It also has an 11mm oil pump on it.
Most of the prices comes from the other parts you listed, i.e. 6-speed, brembo brakes, slightly bigger TMIC, etc etc.