i hav a ep motor with some of work done, the second and third gear sycros are broken and is a PITA to shift. in addition i cant accel my car all the way in first gear cause the tires spins. i was doing some research bout how much will cost me to fix the trany and put a LSD or modified my oem diff whith a phantom grip lsd, and i get to the conclussion that buy a 06 si trany will be cheaper since already have a lsd plus an 6th gear, but im not sure if it will fit. i will app your help! thanx!