Wanting to clear my confusion a bit. ECU controls the ignition, rev limit, transient fueling etc. So a better ECU allow more space for a greater mods like horsepower, torque?
A few feeks back, i went to Auto Vision to change my ATF and to do a flush. I also changed the filter and was "supposed" to change the gasket. Instead of the gasket, they used a sealant. They said no...