SKU: 31433740122

VRSF N55 4" Decat Ceramic - F Series (M135/235/M2/335/435)

Sale price$166.50 Regular price$185.00
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Ships within 48 hours · Estimated delivery Sep 23 - Sep 28

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Description

VRSF N55 4" Decat Ceramic - F Series (M135/235/M2/335/435)We are proud to introduce our VRSF catless & catted downpipe for your N55 BMW. This downpipe is THE best bang for the buck mod available. This downpipe is available in both catless (race) & catted configuration. Back pressure is significantly reduced by eliminating the restrictive catalytic converter in the factory downpipe with our catless or high flow 200 cell race cat which results in faster spool, an increase in power & a more aggressive exhaust

 

We are proud to introduce our VRSF catless & catted downpipe for your N55 BMW. This downpipe is THE best bang for the buck mod available. This downpipe is available in both catless (race) & catted configuration.

Back pressure is significantly reduced by eliminating the restrictive catalytic converter in the factory downpipe with our catless or high flow 200 cell race cat which results in faster spool, an increase in power & a more aggressive exhaust note.

VRSF downpipes are hand crafted from mandrel bent SS304 grade stainless steel and our CNC precision machined flanges are also constructed from billet 304 grade stainless steel. All VRSF products include a lifetime warranty as well as our “No Hassle” satisfaction guarantee (including fitment). All M135i & 335i models produced up to 07/13 require the 3.5″ version of this downpipe. M135 and 335i models produced after 07/13 require the 4″ model of this downpipe. All M235 and 435i models require the 4″ version of this downpipe. Please feel free to contact us with the last 7 of your VIN if you need help determining exactly which version of the downpipe your car requires.

Note: We also offer ceramic coating services utilizing Cerakote High Temperature Ceramic coating, made to withstand temperatures up to 1800F. We use Cerakote’s best thermal barrier coating which helps keep the hot air inside the exhaust and out of the engine bay which decreases overall intake air temps along with engine and transmission oil temps. Please note that while we do offer a lifetime warranty on the downpipes, we only offer a 1 year warranty on the ceramic coating as well as the catted versions.

VRSF Catless & Catted 3.5″ / 4.0″ N55 Stainless Steel Down Pipe

  • Made from hand crafted, tig welded 304 grade stainless steel.
  • Smooth radius bends to decrease turbulence and increase flow.
  • 200 cell high flow cat as well as catless options available.
  • CNC SS304 stainless steel flanges.
  • Gains from 20-25hp with tune.
  • VRSF Lifetime Warranty
This item fits the following BMWs:
 
2012 – 2018 F30 BMW 335i & 335xi N55
2013 – 2018 F32/F33 BMW 435i & 435xi N55
2012 – 2018 F20/F21 BMW M135i & M135xi N55
2013 – 2018 F22 BMW M235i & M235xi N55
2015 – 2019 F87 BMW M2 N55
The use of de-cats, sports cats and removing OPF are for off road/motorsport use only. Using these parts would inhibit your vehicle from passing a MOT test.

Only EC type-approved components are legal and fit for road use.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 31433740122

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4.4 ★★★★★
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J
Verified Purchase
John
New York, US
★★★★★ 5
Good product
Color: Blue, Number of Items: 1
I like the product and it works as advertised
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026
J
Verified Purchase
John H.
Lake Worth, US
★★★★★ 5
Keeps your engines running right.
Color: Blue, Number of Items: 1
Works great. I've had less trouble , mosty excellent performance with my small power tools and yard equipment since I've been using this and other Stay bil products.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026
L
Verified Purchase
Len
Massapequa, US
★★★★★ 5
Easy Rider
Color: Blue, Number of Items: 1
Great product. Great price. Costs double at most retail stores. I use it for fuel in Bass Boat, Harley + all lawn cutting fuel for motors.
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Reviewed in the United States on February 24, 2026
G
Verified Purchase
Georgyo07
West Palm Beach, US
★★★★★ 4
Helped to improve combustion in 12 year old Mercruiser 3.0L engine
Color: Blue, Number of Items: 1
I used the whole bottle in 1/2 tank of questionable gasoline from used boat from dealership, with no idea what mixture of gas water and particulates was in the gas tank in this 12 year old boat. The dealer started up the boat, and it was taking a minute to get the idle going. He mentioned that the gas was a few months old, but I am guessing that is was more like 6 months old. This is the TKS engine, self priming. I think some water / condensate was in the tank. Before taking out to first trip, I added bottle and 5 gallons fresh gas. That trip to the lake, I still has some issues getting it to start easily. Ran OK, not great that day, went home, changed cap and rotor and wires. Next trip, 1 week later, the 3.0L started great, ran great, I am not sure if it took some hours to fully mix and interact with the old gas, neutralize the water, and perform it's reactions, before it made existing gas more combustible, but that is what it seemed like to me. ***UPDATE**** - I had strange fuel issues the next season after using this product. I had to replace the fuel pump and many other fuel delivery components including the carburetor. Not sure if this contributed to the fuel system failing, the long term effects outweigh the short term gains.
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Reviewed in the United States on September 25, 2024
Z
Verified Purchase
zippytroll
Pawtucket, US
★★★★★ 5
good buy
Color: Blue, Number of Items: 1
good buy
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026

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