Originally Posted by mvagusta
I would not tune my m3.. I believe in a pulley and air filter,x pipe with 200 cel cat's. What ever the stock computer calibrate's is what it is.. Maybe dinan tune if thay warranty it. I don't want a kaboooommmmm.. jmo.
It specifically states in Dinan warranty, not to use with other brand aftermarket parts. So you better use all Dinan parts, if you want the warranty to be valid.