Best chip for 1991 318is?

[JeepXJ]

What is typically reguarded as the best chip for a 1991 318is M42?

Where can I buy it?

[h0lmes]

Mark D

[Dave]

M20b25

[MR 325]

Mark D

[Tvan]

Mark D

I hear this is the way to go.

[Hick]

I still wanna see a damn comparison! I got a fleabay 30 buck chip that is a crack copy of the Jim C chip... works great!

[Axxe]

M20b25

That's a bit more involving than a chip.

[optimusp517]

now question I was looking through Mark D's website and I don't see a chip for a #525. I got a 87 325is that came with last 3 digit of #525 and doesn't seem like they make a chip for that model at all... or do they upon special request?

[B2ThaZiZza]

Ive got the JC chip and i like it but i also hear that the Mark D one is good.

[BimmerToad]

AA tuning .... once you drop in a m52

[hamann318is]

M20b25

That's called a boldfaced lie, friend. We need torque!

M20b27

[2002maniac]

M42b21=torque