[Zuzu]

Originally Posted by Gtrain

Does the 1M have high flow cats in the downpipes?
I have read elsewhere that the 1M had high flow cats but was wondering if there was any data to back that up.

From looking at realoem, the 1M cats versus the 135 n54 cats, they have different part numbers for sure.

1M
01 Rmfd primary catalytic converter ZYL. 1-3 1 18307980403
02 Rmfd primary catalytic converter ZYL. 4-6 1 18307980404

135 N54 Engine
01 Rmfd primary catalytic converter ZYL. 1-3 1 18307553594 $957.00
02 Rmfd primary catalytic converter ZYL. 4-6 1 18307553595 $957.00

Its here..

http://www.1addicts.com/forums/showthread.php?t=691143

and here..

http://www.1addicts.com/forums/showthread.php?t=702209