Hello all!

Do any of you have experience with the MTM chip for the b5 s4? I'm looking at buying a used ecu that's already chipped and don't know much about it. I've been considering the APR or GIAC chips and ran across this.

I asked the seller if it was tuned to a specific octane and he said that it adjusts to whatever you put in. Sound right?

Thanks for any help you can provide.

D