View Full Version : e to i exhaust swap

07-06-2004, 10:34 PM
Ok, I'm going to put a 325i exhaust on my 325e, does anyone know the difference in performance it will make?

Also what about the 02 sensor, the 'e' is by the cat, the 'i' is in the engine bay.. anyone?

07-06-2004, 11:21 PM
i don't see it making a whole lot of difference, but couldn't say for sure, i strait piped mine and it worked really well

07-08-2004, 02:49 PM
you will notice that you will loose some torque and gain some top end...


07-09-2004, 03:27 AM
^^^yep you will tend to lose a marginal amount of torque, but hardly noticable, but you will get a slight gain in top end, unfortunatly you might not notice because of the low redline of the eta engines....

As for the O2 sensor, it goes after the collector, there is a cross section between the two pipes, thats where the O2 goes, it will heat up faster beacuse its closer to the manifold.:)

paul christians
07-09-2004, 08:37 AM
go after market!!!!