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MAD (Mastery

S58 Catted Downpipes 3.0L 3-Inch 304SS

$859.00 $569.00 Save $290.00

SKU: MAD-051

Out of Stock
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The MAD BMW S58 Catted Downpipes are a performance upgrade for BMW M2, M3, and M4 models equipped with the S58 3.0L engine. These downpipes feature 200-cell race catalytic converters designed to reduce emissions while enhancing exhaust flow and sound. The construction utilizes 304SS material and a 3-inch pipe diameter for optimal performance.
Show original supplier description
Upgrade your BMW S58 engine's performance with the MAD Catted Downpipes, specifically designed for M2, M3, and M4 models (G80, G82, G83, G87). These downpipes feature a 200-cell race catalytic converter and are constructed from durable 304SS with a 3-inch pipe diameter. These downpipes are also compatible with aftermarket exhaust systems, offering flexibility for further customization. However, it is important to note that these downpipes are not for sale or use in California on any pollution-controlled vehicle, as per the California Air Resources Board. This product fits the following BMW models with the S58 3.0L engine: G80 M3, G80 M3 Competition, G80 M3 Competition xDrive, G82 M4, G82 M4 Competition, G82 M4 Competition xDrive, G83 M4 Competition xDrive, and G87 M2. Always use the vehicle selector to confirm exact fitment for your specific vehicle.
Vehicle Symptoms
  • Lack of top-end power above 5000 RPM
  • Check engine light for catalyst efficiency
  • Exhaust note too quiet from stock system
  • Turbo lag feels excessive on acceleration
  • Engine feels choked at high RPM
Diagnostic Codes
  • P0420 – Cat Sys Efficiency Below Threshold (B1)
  • P0430 – Cat Sys Efficiency Below Threshold (B2)
Relevant Conversations
  • S58 downpipe upgrade for more power
  • MAD catted downpipe vs catless review
  • P0420 on G80 M3 after downpipe install
  • How to install downpipe on BMW S58
  • MAD-051 downpipe dyno results
  • BMW M4 G82 downpipe before and after sound
  • S58 downpipe with stock exhaust compatibility
  • Best catted downpipe for S58 engine
  • Downpipe check engine light fix P0420
  • Will catted downpipe trigger P0430 on M2

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

BrandMAD (Mastery
Part NumberMAD-051
CategoryExhaust
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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.

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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.

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