wats the diff?

 

10hp couple ft-lbs of torque... head/cams/im

 

And a bigger throttle body by 2 mm

 

wait which one

 

b18b1 there's a pretty noticable difference in the two, i swapped out a 93 b18a1 for a 97 b18b1 and noticed a pretty good difference.

 

b18a uses EGR and the b18b doesnt and basically the build from the head up is the difference and its like a 10-15 hp difference sorry about bringing up a dead post but nobody mentioned anything about the egr thought i would let this guy know. peace -mike

 

only auto b18a1 use egr

 

the only diff is da head, my cousin swapped the cams

from the B1 into his A1 and he feels the difference.

It mostly the head.