Exhaust› Catalytic Converters

JHM

2.5" Stainless Steel Downpipes with Catalytic Converters

$1,799.95

SKU: FIN-FI-B6S-DP

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Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The JH Motorsports FIN-FI-B6S-DP is a set of 2.5" stainless steel downpipes featuring 300-cell high-flow catalytic converters and flex couplers. These downpipes are designed to provide increased performance potential over stock, with testing showing that a 2.5" diameter does not sacrifice torque and allows for greater top-end gains.

The package includes both downpipes with flanges, catalytic converters, flex couplers, mid-pipes, and all necessary hardware. Options are available for automatic or manual transmissions and different cat-back exhaust connections.
Show original supplier description
The JHM FIN-FI-B6S-DP are performance downpipes constructed from 2.5" stainless steel, featuring 300-cell high-flow catalytic converters for improved exhaust flow. These downpipes are engineered for the Audi S4 B6 (2003-2005) and B7 (2005.5-2009) chassis, specifically for the 4.2L V8 40v engine. Options are available for both automatic and manual transmissions. The connection to your cat-back exhaust system can be configured as a dual 2.5" or necked down. For optimal performance, it is recommended to use a full 2.5" cat-back system; if your current system is necked down, modifications may be necessary to avoid restricting these downpipes. The manufacturer, Fast Intentions, has a proven track record, achieving a 12.97 @ 109.1mph quarter-mile time with a car tuned using their cat-back and downpipes. Important Considerations: These downpipes are for racing competition and off-road use only and are technically not legal for use in highway or street vehicles in California and other states due to emissions regulations, as they do not have a CARB E.O. number. Purchasers acknowledge and certify that their vehicle will only be used for racing applications or off-road use only and agree to indemnify JH Motorsports Inc. for any liability arising from use on public streets or highways. Additionally, this product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. Shipping is via ground only.

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.

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Specifications

BrandJHM
Part NumberFIN-FI-B6S-DP
CategoryExhaust
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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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