[CSS33]

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Newbie here, and I have read a lot of the exhaust posts, but I still don’t quite understand the different modifications. My understanding is removing the resonators, possibly x pipe and locking valve open will improve sound without CEL, but if you remove the CAT you get CEL? What is the best band for the buck without getting CEL or risking warranty?

[Soylent]

You get the CEL when you remove the primary cats which are located on the downpipes. Not when you just remove the secondary cats on the midpipe.

[CSS33]

So replacing midpipes gets rid of one CAT? Where are the resonators and what do you need to remove them?

[Soylent]

Yes installing one of the aftermarket midpipes removes the resonators and the secondary cats. Significant sound increase and improvement. Any louder and it would be too much for my liking.

[mike@x-ph.com]

I created a thread explaining the different sections of the midpipe , hopefully, it'll help. Here is the link
https://g80.bimmerpost.com/forums/sh....php?t=1862822

[ronin_pdx]

Originally Posted by mike@x-ph.com

I created a thread explaining the different sections of the midpipe , hopefully, it'll help. Here is the link
https://g80.bimmerpost.com/forums/sh....php?t=1862822

Hey Mike the F8x axle back looks like it will fit on G8x. Have you guys tried this yet. Just wondering.

[mike@x-ph.com]

Originally Posted by ronin_pdx

Hey Mike the F8x axle back looks like it will fit on G8x. Have you guys tried this yet. Just wondering.

We have not

[CSS33]

Thanks for the link. Looks like the PSI mid pipe might be the best option for better sound and no worry of CEL?

Dumb question, but can any shop install these once purchased? What is typical mid pipe install cost?

[TexasEd]

Originally Posted by CSS33

Thanks for the link. Looks like the PSI mid pipe might be the best option for better sound and no worry of CEL?

Dumb question, but can any shop install these once purchased? What is typical mid pipe install cost?

I have one for sale in the classified section (sold my car). It was fairly easy to install. The sound was great and I noticed an improvement in throttle response and torque.

[mike@x-ph.com]

Originally Posted by CSS33

Thanks for the link. Looks like the PSI mid pipe might be the best option for better sound and no worry of CEL?

Dumb question, but can any shop install these once purchased? What is typical mid pipe install cost?

1 - 1.5 hours for the install. PSI sounds great, but no CEL worry with any midpipe option. it's only when you replace the downpipes you'll need to worry about the CEL

here is an install video of the Active Midpipe, the PSI install is very similar

[CSS33]

Went ahead and ordered the PSI mid pipe set up. Can’t wait!

[mike@x-ph.com]

Originally Posted by CSS33

Went ahead and ordered the PSI mid pipe set up. Can’t wait!