Heating and Cooling› Thermostats, Housings and Fillers

TGK Motorsport

Audi 4.0T Front Thermostat Billet Piping Kit

$389.99

SKU: TGK-ENG-06

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

Moderate — 2–4 hours

Overview

The TGK Motorsport Audi 4.0T Front Thermostat Billet Piping Kit is engineered to replace the factory plastic coolant elbow on your Audi 4.0T. This component is a known failure point, relying on a single O-ring that can harden and leak over time, especially in cold conditions.

The kit features a precision-machined 6061 aluminum construction with a dual-gasket design for enhanced sealing and long-term reliability. It offers a direct OEM replacement, providing a permanent solution to recurring coolant leak issues.
Show original supplier description
Eliminate the persistent cold-temperature coolant leaks on your Audi 4.0T with the TGK Motorsport Front Thermostat Billet Piping Kit. The TGK Motorsport solution is crafted from robust 6061-T6 aluminum, offering superior strength and thermal resistance compared to the OEM plastic component. It features a precision CNC-machined finish for exact OEM fitment and incorporates a dual-gasket sealing design that provides redundant protection against leaks, even under high-stress conditions or as the engine ages. This extreme thermal cycling resistance ensures reliability through repeated heat cycles that degrade factory plastic parts. Installation is straightforward as it is a direct OEM replacement, intended to outlast the life of your engine and resolve recurring coolant leak problems. This kit is an ideal solution for both preventative maintenance and addressing existing, hard-to-diagnose leaks that occur at the front of the engine near multiple coolant pathways. This billet piping kit is compatible with select Audi 4.0T models, including S6/S7 and RS6/RS7/A8/S8 variants.

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

BrandTGK Motorsport
Part NumberTGK-ENG-06
CategoryHeating and Cooling
5,000+ Trusted brands
1M+ Enthusiasts
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(760) 282-4645 hello@motormia.co

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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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