Product images and videos 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.

Exhaust› Exhaust Pipes, Systems and Components

VRSF B58

B58 4.5-Inch Stainless Steel Downpipe

Name: B58 4.5-Inch Stainless Steel Downpipe
Brand: VRSF B58
SKU: 10582060

$290.99

SKU: 10582060

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The VRSF B58 is a downpipe designed to improve performance for BMW X3 M40iX and X4 M40iX models. It features a full 4.5-inch stainless steel construction with a CNC 304-grade stainless steel flange for a smooth transition from the turbo to the mid-pipes. This downpipe is available in both race and high-flow catted configurations.

By reducing back pressure and eliminating the restrictive factory catalytic converter, this downpipe leads to faster turbo spool, increased power, and a more aggressive exhaust note. It is crafted from hand-welded SS304 grade stainless steel and includes a lifetime warranty, though the catted version has a two-year warranty.

Show original supplier description

Introducing the VRSF B58 Downpipe, engineered as a significant performance upgrade for your B58-powered BMW X3 M40iX (G01) and X4 M40iX (G02). This downpipe is positioned as a premier "bang for your buck" modification, offered in both a catless race configuration and a high-flow 200-cell catted option. The primary benefit of this downpipe lies in its ability to drastically reduce back pressure. By replacing the restrictive factory catalytic converter, it facilitates quicker turbo spool, a notable increase in horsepower and torque, and a more aggressive exhaust note. The construction features a robust 4.5-inch diameter hand-crafted, TIG-welded 304-grade stainless steel tubing and a CNC-machined 304-grade stainless steel flange for optimal flow and durability. Key features include its SS304 grade stainless steel construction, a lifetime warranty on the component itself (with a two-year warranty specifically for the catted downpipe), and a "No Hassle" satisfaction guarantee that covers fitment. The design incorporates smooth radius bends to minimize turbulence and maximize exhaust flow. When equipped with a tune, this downpipe is advertised to provide gains of 25-30 horsepower.

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

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

Brand	VRSF B58
Part Number	10582060
Category	Exhaust

Videos

Stage 2 BMW X4 M40i Downpipe Install! + Tune! | MHD + VRSF (Before and After SOUND!)

BMW X3m40i VRSF Downpipe install 2020 G01

X3 M40i VRSF catted downpipe coldstart

2020 BMW X3 M40i G01 with VRSF Catted Downpipe Cold Start

BMW F25 X3 N55 POWER MODS: VRSF EVERYTHING! (Chargepipe, Downpipe, Intercooler INSTALL +SOUND

BUILDING A BMW X3 35i into a X3 40i KILLER! (VRSF Everything, BHP Intake, XHP Tune, + MORE!

5,000+ Trusted brands

1M+ Enthusiasts

5M+ Parts sold

(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy