I was thinking cold air intake? but that will probly give only me around 10 -12 tops what you think?
i want the same thing too. probably change the "chip" for fuel & emission control. here's a hint: in the philippines the 2003 corolla is called Altis. It's 1.8L, VVT-i 4 cylinder, DOHC, 16 valve, & here it is 145 hp @ 6,000 rpm & 188 torque @ 4,200 rpm. Please post whatever you guys find out.aw10134 said:Does anyone know the cheapest way to add 20-25 horse to the 2003 corolla S?