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Exhaust› Exhaust Pipes, Systems and Components

VRSF 4.5"

4.5" B58 Downpipe Upgrade

Name: 4.5" B58 Downpipe Upgrade
Brand: VRSF 4.5"
SKU: 10202010

$281.24

SKU: 10202010

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The VRSF B58 Downpipe is a high-flow exhaust component designed to reduce back pressure and increase power. Available in race or catted configurations, it replaces the restrictive factory catalytic converter with a 200-cell high-flow race cat. This upgrade results in faster spool, increased power, and a more aggressive exhaust note. The downpipe is constructed from hand-crafted, tig-welded SS304 grade stainless steel with a 4.5" diameter and a CNC-machined flange for a smooth transition.

Show original supplier description

The VRSF B58 Downpipe Upgrade is a performance exhaust component crafted to replace the restrictive factory catalytic converter, leading to faster turbo spool, increased power, and a more aggressive exhaust note. This downpipe is offered in both a catless race version and a high-flow 200-cell catted configuration. It is constructed from hand-crafted, tig-welded 4.5" 304-grade stainless steel, ensuring durability and corrosion resistance. The CNC-machined 304-grade stainless steel flange provides a smooth, seamless transition from the turbocharger to the mid-pipes. It is compatible with both the stock cat-back exhaust system and aftermarket cat-back systems. VRSF offers a lifetime warranty on this product, with the exception of the catted downpipe, which carries a two-year limited warranty. The available gains are an estimated 25-30hp when paired with a tune. This downpipe is specifically designed to fit the following BMW models equipped with the B58 engine: 2019-2023 G20, G22 & G26 M340i & M440i xDrive; 2019-2022 F22 M240i & xDrive; 2021-2023 G42 M240i & xDrive; 2019-2023 G05 X5 40i & xDrive; and 2019-2023 G29 Z4 M40i.

Vehicle Symptoms

Check engine light for catalyst efficiency
Sluggish acceleration and loss of power
Excessive turbo lag during spool-up
Restrictive exhaust feeling at high RPM

Diagnostic Codes

P0420 – Cat Sys Efficiency Below Threshold (B1)

Relevant Conversations

P0420 code on B58 – replace cat or downpipe?
B58 downpipe install time?
VRSF 4.5" downpipe vs catless vs catted
Best downpipe for B58 turbo response
B58 downpipe with 200-cell cat review
How to fix catalyst efficiency code on B58
B58 downpipe sound clip and dyno results
Downpipe for B58 with aggressive exhaust note
B58 downpipe and stage 1 tune co-purchase
B58 cat delete legal issues and solutions

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	VRSF 4.5"
Part Number	10202010
Category	Exhaust

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Shipping

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