42 Draft Designs 3" Downpipe for VW 1.8T K04

  • 42 Draft Designs 3" Downpipe for VW 1.8T K04 (EX04K4DP)
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$485.00 $475.30
(You save $9.70)
16.00 LBS
Product is made to order. Allow up to 5-15 business days for production before product is shipped.
Calculated at checkout

VW & Audi Performance Parts: 42 Draft Designs 3" Downpipe for VW 1.8T KO4 (EX04K4DP)

Product Features & Benefits

  • Bolt-on Gains For Less!
  • Increased Horsepower
  • Improved Turbo Spool and Throttle Response
  • Precise pipe routing and a stainless steel flex section assure hassle-free fitment

42 Draft Designs 3” downpipe is the single most effective bolt-on upgrade for the Mk4 Volkswagen 1.8T. No other basic physical modification can compete with the power gains delivered by this fundamental upgrade. Simply by reducing backpressure creates useable horsepower and torque throughout the power band while also improving turbo spool and throttle response.

Street Series downpipes are equipped with a 200/cell high-flow catalytic converter. Race Series downpipes include only a test pipe for track day. Included adaptor reduces pipe size to utilize the OEM band clamp. Additional cat-back adaptor sizes are available. 

The modular nature of the 42 Draft Designs VW 1.8T KO4 3" downpipe allows the user to change configurations at any time. For example, the downpipe may be purchased with a stock sized adaptor and connected to stock or any basic aftermarket cat-back exhaust. At any time a 2.5" or 3" cat-back can be installed using the appropriate adaptor. The 42 Draft Designs 3" cat-back systems are completely compatible with this downpipe allowing the possibility of a 3" turbo-back in any configuration. On race days the catalytic converter can be easily swapped for a test pipe.

Construction Highlights

  • CNC machined stainless steel v-band
  • CNC mandrel bent aluminized steel tubing or 
  • CNC waterjet cut 1018 cold roll steel flanges
  • Professional TIG welded construction throughout
  • 409 stainless steel 200/cell metal catalytic converter
  • Stainless steel double-braided flex section
  • CNC waterjet cut & fabricated stainless steel support bracket
  • High-temperature vermiculite gaskets
  • Grade 5 locking hardware
  • CNC machined hanger assembly cad/zinc plated steel

Construction Highlights (STAINLESS STEEL UPGRADE)

  • CNC machined stainless steel v-band
  • CNC mandrel bent 304 stainless steel tubing
  • CNC waterjet cut 304 stainless steel flanges
  • Optional CNC machined 304 stainless steel male/female v-band flanges
  • Professional TIG welded construction throughout
  • 409 stainless steel 200/cell metal catalytic converter
  • Stainless steel double-braided flex section
  • CNC waterjet cut & fabricated stainless steel support bracket
  • High-temperature vermiculite gaskets
  • Stainless steel hardware & copper coated locking nuts
  • CNC machined hanger assembly stainless steel

Additional Details


  • 2000-2006 Audi TT 180 FWD
  • 1999-2005 VW Mk4 Golf, Jetta, GTI 
  • 1998-2010 VW New Beetle 1.8T 
  • Included adaptor allows fitment to stock exhaust
  • Will fit any cat-back exhaust that reduces to stock diameter

Note: Vehicle MUST be equipped with OEM Audi TT 225 exhaust manifold and K04-020, K04-021, or K04-023 turbocharger. Fitment with aftermarket turbocharger or exhaust manifold is NOT supported. 

Polyurethane transmission mount inserts are HIGHLY recommended for this application. 

*Model years listed are based on US models. European model years may differ. If shopping for a vehicle sold outside the US please match chassis designation before matching model year.

This downpipe has been designed to fit a specific combination of vehicle, turbo and exhaust manifold. No guarantee or fitment if certain components are not used. The following components MUST be used to ensure proper fitment:

  • OEM Audi TT 225 Exhaust Manifold
  • OEM Audi TT 225 K04-020, K04-021, or K04-023 Turbocharger

There are many aftermarket exhaust manifolds available which mimic the OEM TT 225 fitment. However, 42 Draft Designs has not tested any of these manifolds and there is no guarantee that the 42 Draft Designs 3" downpipe will fit properly. Additionally, many knock-off K04 turbochargers are available which claim to replicate the OEM turbocharger. No support or guarantee of fitment will be applied to the 42 Draft Designs downpipe if the proper OEM components are not used. This downpipe was designed to exactly replicate the fitment of the mk4 downpipe. It has not and will not be tested by 42 Draft Designs on mk2 or mk3 1.8T swap applications.

V-Band Flanges

42 Draft Designs now offers v-band connection flanges with the stainless steel exhaust systems. Compared to 3-bolt flanges, exhaust systems built with v-band flanges are easier to install and adjust. V-band connections don't require a gasket, and can be serviced with a single tool. Overall, v-band flanges speed-up initial install and race-day component changes.

These V-band flanges are CNC machined from 304 stainless steel. Using a male/female fitment specification for the flanges aids in sealing the connection. Due to the material cost and manufacturing time, v-bands will remain a premium option.


   We make no claims as to emission performance for street or highway use.  Some equipment is not sold for street use in any state or country where state or federal regulations prohibit its use.  Some items listed in the online catalog are intended for off road use and for purpose built race cars only.  EUROTEK TUNING, LLC does not make any claims of street legal use of these products that are not intended for use on public roads.  We do not ship any emissions related equipment to the state of California.  We require an off-road/track use only waiver completed, signed, faxed, emailed or returned to our facility before emission related equipment is shipped to customer supplied address.  We are not affiliated with Volkswagen Audi Group, Porsche AG or any of their subsidiaries.  EUROTEK TUNING, LLC is not responsible for errors on our website.

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