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ARM Price $267.00

-Gain 25whp + 37wtq
-3" Design
-304 Stainless Steel
-Improved Exhaust Sound
-Run Stage 2+ Boost

Availability: IN STOCK: Typically Ships in 24hrs
Product Code: 335X-DP



Take your N54 powered BMW 335xi to the next level with ARM Motorsports 3" catless downpipes. The ARM N54 AWD catless downpipes eliminate the restrictive OEM converters on the stock downpipes allowing the exhaust to flow more freely, increasing power and torque. Because higher boost levels generate more heat, the ARM 335xi catless downpipes allows your AWD N54 to run boost settings of Stage 2 tunes and beyond.

The ARM 335xi catless downpipes are designed with 3" stainless steel construction to optimize exhaust flow off the turbochargers and reduce to 2.5" to match up perfectly to the OEM midpipes. Our 335xi downpipes are designed specifically to fit your AWD N54 platform.

Each downpipe has two O2 sensor bungs so the factory BMW O2 sensors can be remounted allowing the ECU to continue to monitor the air/fuel mixture via the exhaust. Because these downpipes are a catless design, an ECU tune or CEL fix will be needed to avoid a CEL from displaying on instrument panel.

  • Gain 25whp + 37wtq
  • Improved Exhaust Sound
  • 304 Stainless Steel
  • Perfect Fitment
  • ARM Downpipe Set
  • New Gaskets
  • Hardware Kit

2007-2010 BMW 335xi Coupe/Sedan/Convertible (N54 Only)

Every ARM Motorsports product is backed by a lifetime warranty which is automatically issued at the time of purchase. Your warranty protects you against any defects in craftsmanship or fitment. The warranty entitles you to a replacement unit.

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 7 Write a review »

  1 of 1 people found the following review helpful:
5 of 5 best downpipes for the money February 13, 2020
Reviewer: Justin from Mentor, OH United States  
Quality welds and good fitment for a low price. What else could you ask for.

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  0 of 0 people found the following review helpful:
4 of 5 Good so far December 26, 2019
Reviewer: Thomas Neary from East Northport, NY United States  
Got the n54 xi catless downpipes. I still have to install them but they look amazing for the price. Definitely worth it especially because they come with the gaskets and new bolts. I also got their dci and chargepipe. The dual cones look and feel a little cheap like a spectre intake but they do the job. They're a little smaller than the bms ones too so they fit in the bay a little better. And the chargepipe fits great. Positioning the coupler for the intercooler pipe is a bit of a pain but that's typical for any n54 cp.  overall I'm very happy with everything so far

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  0 of 0 people found the following review helpful:
5 of 5 Excellent Fitment and quality September 13, 2019
Reviewer: Eric Pratt from CLEARFIELD, UT United States  
I was hesitant to get downpipes from ARM as I've always heard such great reviews from VRSF. And they were at a better price which made me also think that the quality was a little less. However, when they came in I found the quality was excellent. I took the opportunity to bundle my order with a charge pipe and that fitment was excellent as well. Excellent quality products.

I installed these on my 2008 e90 335xi. Being an AWD vehicle it was definitely difficult to get in there to switch them out, but the fitment was perfect once I got them in there.

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  0 of 0 people found the following review helpful:
5 of 5 So far so good August 23, 2019
Reviewer: Jordan Holder from Okeana, OH United States  
I have yet to install them because of issues with my car but so far so good.  Super good welds an quality.  Due to seized v-band  clamps I've yet to install them!

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  0 of 0 people found the following review helpful:
5 of 5 June 7, 2019
Reviewer: Beamer.e90 from Denver, CO United States  
The welds are out of this world. It exceeded my expectations for the price they offer them.  Highly recommend them if you have an XI.

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