340i standard twin exhaust, fitted to 335/435d?

[handbraketurn]

Hello,

I've seen in a few other forums that people have modified 330/335d's to accommodate the 340i standard valued twin exhaust back box.

Like this one:

https://f30.bimmerpost.com/forums/sh....php?t=1562...

Can anyone tell me if you could fit it to a 435d convertible?

Cheers,

HBT

[imuir]

Yes can be done. I had a 440i rear box fitted to my 428i. You also need a new diffuser.Torqueflow in Birmingham did mine and they are first class. a 435d was in to have dual exhaust outlets fitted and they didn't fit a new rear box as diesels are not as loud without the rear silencer box. Give them a call. I had an SLK 250d fitted with 55 AMG quad rear pipes and no rear box with very little increase in noise.

Edited by imuir on Wednesday 27th March 08:45

Edited by imuir on Wednesday 27th March 09:17

[handbraketurn]

imuir said:

Yes can be done. I had a 440i rear box fitted to my 428i. You also need a new diffuser.Torqueflow in Birmingham did mine and they are first class. a 435d was in to have dual exhaust outlets fitted and they didn't fit a new rear box as diesels are not as loud without the rear silencer box. Give them a call. I had an SLK 250d fitted with 55 AMG quad rear pipes and no rear box with very little increase in noise.

Edited by imuir on Wednesday 27th March 08:45

Edited by imuir on Wednesday 27th March 09:17

Thank you very much for the response, Imuir.

Do you know if the 340i/440i back boxes are the same?

[imuir]

Yes both the same. I would check if you can fit a petrol back box to a diesel as may not be compatible.when I did my 250d the the increase in exhaust noise was minimal with no rear boxes fitted. Give Torqueflow a call or check the website.

[AlwynMike]

The x40i rear box has a valve in the left side tail pipe but its easy enough to bypass.

[handbraketurn]

Thanks, just sold mine to a lad with a 435d and wanted to make sure it was going to fit...Really appreciate quick responses.

[Monty Python]

I've seen a few 335ds with the 340i style exhaust fitted. Seems an expensive way to add what is basically a cosmetic modification (plus the extra cost in insurance).

[rassi]

Monty Python said:

I've seen a few 335ds with the 340i style exhaust fitted. Seems an expensive way to add what is basically a cosmetic modification (plus the extra cost in insurance).

Says the comedian with a 340i

Mine came modified, though more of a custom job of the original 335d exhaust, and it does make for a nicer and more symmetrical rear end (oh dear), but each to their own. For the money it is at least quite a tasteful and OEM looking modification.