AR Design 550i N63 twin turbo V8 downpipes released - $1,199 catless, $1499 for race cats and catless resonated

[Sticky]

Pre 04/11 used a 2 bolt flange to mid-pipe.
Post 04/11 uses a slip fit to the mid-pipe.

What do these two differences mean and why was there a design change?

[AR Design II]

What do these two differences mean and why was there a design change?

No idea why the design change from BMW, the only difference is how the down pipe connects to the mid pipe.

[NHDINANSTAGE3]

Ok, here's the big questions ofr me, how can I get the CEL light to stay off? If someone can tell me that one I'll get these things for my car....

[Sticky]

Ok, here's the big questions ofr me, how can I get the CEL light to stay off? If someone can tell me that one I'll get these things for my car....

Did you read this? http://www.bimmerboost.com/content.p...ight)-disabled

[Silververtu]

Any CEL with the race cat version?

[Sticky]

Any CEL with the race cat version?

bump @ar design @Kai @ AR Design