Originally Posted by panpon
hey dimsum i have 325i 2.5l, i like this cat delete, now i have a muffler and resonator delete, so i need to put them back, how if i just put the muffler back and let the resonator off, will that affect those numbers??? and what else do i need to make this work?? thanks
The numbers will be fine, resonator doesn't really affect anything.
Just weld back muffler, and it will be okay.
All you need is an 02 simulator if you don't want an error.
This is where you learn how to DIY your own o2 simulator. It is just a resistor.