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ARMYTRIX

Stainless Steel Performance De-Catted Downpipe

$4,399.95 $4,267.95 Save $132.00

SKU: BMF98-DD

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Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The ARMYTRIX BMF98-DD is a high-flow performance de-catted downpipe with a cat simulator, constructed from stainless steel. This component helps to reduce annoying frequencies at critical RPMs.
Show original supplier description
The ARMYTRIX BMF98-DD is a high-flow performance downpipe, crafted from stainless steel, designed to replace the catalytic converter and OPF (if applicable). Its design also aims to provide a deeper, sportier exhaust note while mitigating undesirable frequencies at critical engine speeds. Constructed from durable stainless steel, this downpipe utilizes cutting-edge flexible pipe technology and may feature a special rapid-cooling ceramic coating to reduce under-hood temperatures and resist corrosion. The product is designed as a direct bolt-on, with a plug-and-play module intended to reduce installation time compared to traditional wiring methods. Compatibility is specified for the BMW F98 X4 M (2019-Present) with the S58B30 engine, specifically for Non-OPF models. However, customers are strongly advised to utilize their VIN to verify compatibility before installation, as remote control modules may vary or be excluded depending on the specific vehicle model. Further confirmation with an authorized dealer is recommended before purchase.

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

BrandARMYTRIX
Part NumberBMF98-DD
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.

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