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Exhaust› Exhaust Pipes, Systems and Components

S58

Catless Downpipes with 3" V-Band Flange

$767.00 $397.00 Save $370.00

SKU: S58DP

Special Order
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 ARM S58 Downpipes are a set of performance exhaust components designed for the S58 engine. Constructed from SS304 stainless steel, these downpipes feature a catless resonator and a 3" diameter precision CNC machined turbo v-band flange. They connect to OEM or aftermarket midpipes with a 2.75" 2-bolt connection.
Show original supplier description
The ARM S58 Resonated Downpipes are engineered as a performance hardware upgrade for the S58 engine, aiming to enhance throttle response and exhaust sound without requiring a full cat-back system replacement. Constructed from SS304 stainless steel, these downpipes feature a 3" diameter precision CNC machined turbo v-band flange. The longer front downpipe incorporates a reinforced flex section to relieve stress on the turbo during spirited driving. Both downpipes transition to a 2.75" 2-bolt connection, ensuring seamless integration with OEM S58 midpipes or compatible aftermarket midpipes. This modification can provide even greater benefits for tuned S58 engines running higher than OEM boost levels, making them a significant investment for G8X platform vehicles. The ARM S58 Downpipes are compatible with various BMW models including the G80 M3, G80 M3 Competition xDrive, G82 M4, G82 M4 Competition xDrive, G83 M4, G83 M4 Competition xDrive, and the G87 M2, all equipped with the S58 3.0L engine. ARM Motorsports backs this product with a Lifetime Warranty covering defects in craftsmanship and fitment. Please note that this product is intended for Off-Road Use Only and may be illegal for use on public roads in many areas.

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

BrandS58
Part NumberS58DP
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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