Racing Dynamics Downpipes with no welds? Are these worth?

AllenE92PrettyFast · 12-16-2018, 05:13 PM

https://www.racdyn-usa.com/PROD/130+...SABEgJ6ufD_BwE

I just saw them and they claim to be bent by a machine, any advantage/ disadvantage for this?
They look promising, what do you guys think?

nsjames · 12-16-2018, 07:02 PM

I think it makes near as no difference in terms of performance.

maybe one in terms of longevity, as welds are often a place for failure in manifolds.

the price seems reasonable, but I'm not hip to turbo things.

320IN54 · 12-16-2018, 07:40 PM

mandrel bent dps might not fit as well as dps that are welded. The place where the dps go are very tight and has very little clearance which is why a dp that is pieced together and welded might fit better than a mandrel bent one. Also for the price you can get some VRSF or ARM dps which are proven to fit

N54Society · 12-17-2018, 11:42 AM

Fitment may be an issue. Wait for someone else to try it first. The ones from 1320 for instance have fitment issues and they are mandrel bent as well.

AllenE92PrettyFast · 12-17-2018, 01:03 PM

Ok, i guess i might just have to go with arm downpipes, any noise difference between welded or not? I want the car to sounds deep not raspy.

hassmaschine · 12-17-2018, 01:20 PM

Racing Dynamics isn't some fly-by-night Chinese parts maker. I'd bet the quality and fitment are pretty much spot-on.

AllenE92PrettyFast · 12-17-2018, 01:24 PM

Quote:

Originally Posted by hassmaschine

Racing Dynamics isn't some fly-by-night Chinese parts maker. I'd bet the quality and fitment are pretty much spot-on.

Would it sound deeper because its mostly 3"? Better than arm

12-16-2018, 05:13 PM	#1
AllenE92PrettyFast Banned 9 Rep 91 Posts Drives: BMW E92 335Is FBO MHD Stage 2+ Join Date: May 2018 Location: Michigan iTrader: (0)	Racing Dynamics Downpipes with no welds? Are these worth? https://www.racdyn-usa.com/PROD/130+...SABEgJ6ufD_BwE I just saw them and they claim to be bent by a machine, any advantage/ disadvantage for this? They look promising, what do you guys think?
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12-16-2018, 07:02 PM	#2
nsjames Brigadier General 2440 Rep 4,331 Posts Drives: 08 328xi Touring Join Date: May 2017 Location: ohio iTrader: (0)	I think it makes near as no difference in terms of performance. maybe one in terms of longevity, as welds are often a place for failure in manifolds. the price seems reasonable, but I'm not hip to turbo things.
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12-16-2018, 07:40 PM	#3
320IN54 First Lieutenant 123 Rep 331 Posts Drives: 2007 BMW 335i, 2021 BMW M2C Join Date: Jan 2017 Location: Irvine iTrader: (0)	mandrel bent dps might not fit as well as dps that are welded. The place where the dps go are very tight and has very little clearance which is why a dp that is pieced together and welded might fit better than a mandrel bent one. Also for the price you can get some VRSF or ARM dps which are proven to fit
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12-17-2018, 11:42 AM	#4
N54Society Major Private First Class 449 Rep 1,327 Posts Drives: 2010 E90 335i M Sport Join Date: Mar 2014 Location: US, NA, Earth, Milky Way Galaxy iTrader: (2)	Fitment may be an issue. Wait for someone else to try it first. The ones from 1320 for instance have fitment issues and they are mandrel bent as well. __________________ 2008 E92 335i 6MT: FBO + MMP Silicone Inlets \| Stage 1 LPFP \| 335is clutch + MFactory SMFW \| Custom BuraQ + MHD tune \| 3.5Bar N20 sensor [SOLD] 2010 E90 335i M-Sport AT: 5" Stepped FMIC, Stage 2 LPFP - MHD V7 E60 Tune running 100% E85 - VRSF DPs
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12-17-2018, 01:03 PM	#5
AllenE92PrettyFast Banned 9 Rep 91 Posts Drives: BMW E92 335Is FBO MHD Stage 2+ Join Date: May 2018 Location: Michigan iTrader: (0)	Ok, i guess i might just have to go with arm downpipes, any noise difference between welded or not? I want the car to sounds deep not raspy.
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12-17-2018, 01:20 PM	#6
hassmaschine Major General 3966 Rep 7,215 Posts Drives: "NBO" 330i Join Date: Jun 2014 Location: earth iTrader: (0)	Racing Dynamics isn't some fly-by-night Chinese parts maker. I'd bet the quality and fitment are pretty much spot-on.
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