All chips are the same in the BMW applications. The only performance gain you will see with a chip is an increase on the rev-limiter. That's my opinion based on results from my E30 325i. I had my car on the Dyno, and I tested 2 different ECUs, each one with and without a Conforti chip. The highest HP reading was with one of the CPUs running a stock chip. I've talked to 318 drivers who said that the chip was a waste of $$$.
