[TMatt]

So currently I have a Fabspeed Sport Cat and MPE installed on my m235i. I really like the way it sounds with all the pops and burbles and next to no drone but am curious what adding the Fabspeed Secondary Catbypass Midpipe or the Dinan Resonator Delete would do to this setup. Would it make everything louder and more aggressive or would it just increase drone and vibration? I can find videos with muffler bypasses but nothing really with a catted DP and an aftermarket muffler.

Thanks in advance

[beMtroubleYou]

Res.delete is pretty much how the car should have sounded from factory.

It makes no difference when velocity of the gases(exaus) are low(cruising, commuting). The burbles and the snaps are much louder tho without it since there is nothing from slowing down the speed. I have a video without the res and without cat.

Catless gives you same result but you can hear the turbo much more. Hard to say really.
Each to their own.

I would say let your local shop just cut it out and weld a straightpipe. Save your money and support your local shop.

(I think the M-performance exaust is not resonated)

[M235SDCA]

Originally Posted by beMtroubleYou

I would say let your local shop just cut it out and weld a straightpipe. Save your money and support your local shop.

(I think the M-performance exaust is not resonated)

+1 on the local shop. I have an MPE and had a shop cut the resonator out and weld in a pipe. Took about 15-20 minutes. Much less expensive a way to go.

MPE has a very small resonator. Sounded better but didn't make a lot of difference. Would have been disappointed if I spent a bunch of money on a resonator delete pipe.

[beMtroubleYou]

Originally Posted by M235SDCA

+1 on the local shop. I have an MPE and had a shop cut the resonator out and weld in a pipe. Took about 15-20 minutes. Much less expensive a way to go.

MPE has a very small resonator. Sounded better but didn't make a lot of difference. Would have been disappointed if I spent a bunch of money on a resonator delete pipe.

Its true.

Its the M2 standard vs MPE thats not resonated!

[Benandluna]

I own the resonator Delete, with the sport cat and it sounds beastly. Their is slight drone though and conversations require you to talk louder. Cold starts set off car alarms which i hate but once its warmed up and moving it turns into an excellent sounding car.

[mike@x-ph.com]

Originally Posted by TMatt

So currently I have a Fabspeed Sport Cat and MPE installed on my m235i. I really like the way it sounds with all the pops and burbles and next to no drone but am curious what adding the Fabspeed Secondary Catbypass Midpipe or the Dinan Resonator Delete would do to this setup. Would it make everything louder and more aggressive or would it just increase drone and vibration? I can find videos with muffler bypasses but nothing really with a catted DP and an aftermarket muffler.

Thanks in advance

It will sound more aggressive with a deeper tone, one of my favorite mods

[TMatt]

Thanks for your opinions guys. I think I'm going to go to my local muffler shop this weekend and see how much it would be to just straight pipe where the resonator used to be.