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Exhaust› Catalytic Converters

CTS Turbo

B9 RS5 High-Flow Catalytic Converter

Name: B9 RS5 High-Flow Catalytic Converter
Brand: CTS Turbo
SKU: CTS-EXH-DP-0039

$1,199.99

SKU: CTS-EXH-DP-0039

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The CTS Turbo B9 Audi RS5 High-Flow CATS is a direct replacement for your stock catalytic converter, designed for seamless installation after the turbocharger. Crafted from T304 stainless steel and hand TIG welded, it ensures reliable performance. This component offers substantial power gains, improved exhaust flow, and a deeper exhaust note.

Show original supplier description

The CTS Turbo B9 Audi RS5 High-Flow CATS are engineered to replace the restrictive factory catalytic converter located immediately after the turbocharger. Designed with advanced CAD technology, these high-flow catalytic converters ensure a perfect fit, integrating seamlessly with your factory downpipes. They are constructed from premium T304 stainless steel, featuring mandrel-bent tubing and hand TIG welding with back purging for exceptional durability and years of reliable performance. Installing these high-flow CATS provides significant power gains, enhances exhaust flow, and contributes to a more aggressive, throaty exhaust sound. The product details include T304 stainless steel construction, mandrel-bent stainless steel tubing, a fully TIG welded design, and all necessary installation hardware. It is important to note that a check engine light (CEL) may occur, and proper tuning software must be used to avoid this. The use of Stage 2 software upgrade is strongly recommended for optimal performance and to prevent CEL issues. FITMENT: This product is designed specifically for the 2018+ B9 Audi RS5 with the 2.9T engine. Stage 2 software is required to avoid a check engine light.

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	CTS Turbo
Part Number	CTS-EXH-DP-0039
Category	Exhaust

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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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