ok ive never actually seen a dyno prove that 4-2-1's make less power on top than a 4-1 design but ive heard that the 4-1 will have an advantage up high. Do u prefer the 4 into 1 design or the tri y design? I know u import guys dont really care about torque, but its torque that turns the wheels. Does scavenging ever come into play on a motor that is so small? i see the 4-2-1 design as being superior. anyone disagree?