Sound after DP installation...

XxThe_RemedyXx · 08-20-2018, 06:46 PM

Hi all -

I recently installed a catless VRSF DP on my 335 xDrive. SA said I would hear more sounds coming from it but it almost sounds like a boost leak. I haven't logged anything yet with BM3 but was wondering if anyone has a catless DP who is hearing more "air" coming from the engine. It's like this "TSHHHHH" sound when accelerating and its definitely not the intake. I can differentiate between the two sounds and it only happened after the DP install. Just wondering if it's normal.

joeyb26 · 08-20-2018, 06:56 PM

Yes that's normal

XxThe_RemedyXx · 08-20-2018, 07:07 PM

Quote:

Originally Posted by joeyb26

Yes that's normal

Thanks bro!

kern417 · 08-21-2018, 08:33 AM

Some manufacturers use a turbo muffler to reduce the sound. The catalytic converter on the stock downpipe operates in a similar fashion, so what you're hearing is more turbo noise.

08-20-2018, 06:46 PM	#1
XxThe_RemedyXx Colonel 967 Rep 2,653 Posts Drives: 2016 340i xDrive Join Date: Aug 2009 Location: Westchester, NY iTrader: (0)	Hi all - I recently installed a catless VRSF DP on my 335 xDrive. SA said I would hear more sounds coming from it but it almost sounds like a boost leak. I haven't logged anything yet with BM3 but was wondering if anyone has a catless DP who is hearing more "air" coming from the engine. It's like this "TSHHHHH" sound when accelerating and its definitely not the intake. I can differentiate between the two sounds and it only happened after the DP install. Just wondering if it's normal. __________________ 2016 340i xDrive - BM3 Stage 2 93 OTS - xHP Transmission Tune Stage 2 - B58TU HPFP - Bilstein B14 - VRSF Catless DP - Kyostar CAI
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08-20-2018, 06:56 PM	#2
joeyb26 Captain 282 Rep 775 Posts Drives: 2020 M340i xDrive Join Date: May 2013 Location: North NJ iTrader: (1)	Yes that's normal __________________ 2016 340i xDrive 6MT (regretfully sold) 2020 M340i xDrive
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