BMW 340i B58 JB4 Beta numbers are in and they are impressive !!!
16th Dec 2015
The B58 JB4 Beta is almost here and gains over stock are impressive !!!
Could the B58 be the next N54 ?
1st picture stock vs JB4
2nd picture stock vs JB4 with E30
3rd picture JB4 340 E30 vs M3 stock