rev matching is good for the gears, clutch and syncros. engine braking is just a side effect from downshifting early and letting the engine slow the car down. the only time you should actively think about enginebraking is on very long downhill decents, like on a mountain road, so you dont overheat the brakes.
4-Time NNJR ESP Season Champion -15 ESP
3rd Place in 09' Pax Championship/Driver of the Year
2012 Northeast Divisional Champion in ESP