the firing order of the b6t engine is 4-3-1-2
thats what gives the engine that distinct, almost boxer tone on the idle...
better yet look at the motor sideways. split it in half, and think,
outside, inside, outside, inside.
4 (outside) 3 (inside) 1 (outside) 2 (inside)
an engine designed this way makes good torque...
although not the smoothest running design...