Catalytic Converters - illegal to remove where you are - update on exhaust
 

Hi All
I have discovered that the only real way to get an audio track from the E70 4.8i that is similar to the E53 4.8is is to remove a couple of catalytic converters. I am now on my 4th exhaust and still not happy, so down to the removal issue.
However, this is illegal in Australia with massive fines for exhaust/workshops and owners if discovered.
Im curious if this law exists elsewhere in the world.

As a recap, I think Im resolved to a better than stock exhaust from my suppliers, but will hand the E70 4.8i to the wife, sell the 4.8is and I'll buy the new E70 4.8is/twinturbo/M/V10/whatever it will be when its announced. I already have my name down as top of list with BMW list when its announced.

Just a shame we couldnt get the audio track i was seeking, the E70 has 4, yes 4, catalytic converters.

for some vehicles you can get aftermarket cats that are designed to sound nicer than factory in conjunction with a matched aftermarket exhaust. taipanxp is one company here in aus that do it - http://www.taipanxp.com.au/

There are only one set of cats on US cars, mounted on the headers. We do have a pair of resonators after the headers before the muffler, but no secondary cats.

I know it was a mod on the e53 to remove the larger center resonator, and I was considering replacing mine with a couple of bullet resonators. Just not sure what the end result will be.

i am in the same boat.. want better sound out of the exhaust, but i do not want to purchase a $2500 exhaust system...

so the best bet, remove SOMETHING... not sure what just yet... anyone have any pics of the bottom of 4.8i?

call Dinan. at least you are close enough to visit his shop.

i do find this thread kinda funny however. i have modded my pickups for years to be loud and proud. oddly enough i don't think i want that anymore in my DD. i have plenty of other stuff i can mod i guess. not to mention the noise gets old after awhile.