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42 Draft Designs - Audi TT 180Q Downpipe
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42 Draft Designs - Audi TT 180Q Downpipe

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42 Draft Designs 3" Downpipe for MK1 Audi TT 1.8T 180 Quattro
  • $500.00
  • Shipping info

    We deliver worldwide: UPS, USPS, DHL - or pickup your order in Westlake, Ohio

  • Payment methods


  • Return Policy

    We accept returns; please see the Returns and Refunds Page for more info.

  • Weight
    20 lbs
  • SKU

The 42DD 3" downpipe upgrade has been designed to squeeze all available power from a street or track driven TT.
Power increases can be felt instantly after installation. Midrange and top end power increases dramatically while
almost no low end power loss is felt. Boost builds steadily without a major spike in pressure. On the smaller K03
turbo cars power increases are maximized by additional modifcations (intake, cat-back exhaust, N75 valve, etc).
Since the 1.8T's initial VW release in 2000, it has been proven time and time again that 3" downpipe upgrades
provide healthy power increases on all 1.8T motors.

The downpipe bolts up with a CNC machined turbo flange. A slight expansion to the stock turbo outlet allows
exhaust gases a smooth transition to 3" piping. A stainless steel flex section accurately placed allows for engine
movement. 42DD's adjustable 3-bolt flange finishes up the first section of our downpipe, allowing for precise
adjustments in fitment and a Magnaflow cat bolts-up and piping makes an S-bend to meet the stock exhaust location.

An adaptor is used to allow bolt-on fitment to any stock or aftermarket cat-back. The whole system bolts together
with grade 5 hardware and triple layer gaskets. Mechanical locking nuts are used to ensure the downpipe never
comes loose.

The 42DD downpipe upgrade is available in two configurations - street or race.

  • Street series downpipes include a high-flow cat, a Magnaflow 200 cell metal cat in a spun stainless steel body.
  • Race series downpipes include a test pipe. Test pipes and cat sections are available separately for those who
    wish to change at a later date. Thanks to the modular flange design the cat can be easily removed on race day
    and reinstalled for street use.


  • • CNC mandrel bent 14 gauge aluminized steel tubing
  • • CNC machined 3/8" steel flanges
  • • 100% TIG welded construction
  • • Included 2.150" adaptor allows fitment of any cat-back
  • • Stainless steel braided flex section
  • • Magnaflow 200 cell 409 stainless steel cat (Street Series)


  • • Fits 2000-2006 Audi TT 180 Quattro
  • • Custom adjustable flanges allow for precise fitment in every TT
  • • Available in street or race configuration
  • • 2 triple layer gaskets included
  • • 5/16" corrosion resistant locking hardware included

This downpipe will NOT fit 180 FWD or 225Q TT's


Make Model Year Engine
Audi TT MKI (1998-2007) Quattro 180
  • Optional Coating
    None, Add Ceramic Coating
  • Series
    Street Series (High Flow Cat)
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Most parts are available for local pick-up with no shipping or handling charge. Please select the in-store pickup option during checkout. Once we receive your order you will be contacted to schedule your pick-up.

Once your order has been shipped, and if the method of shipping has been assigned a tracking number you will be notified of the number. Please note that carriers such as UPS may not update the tracking number status until late in the evening when the daily pickups have been recorded.

In the event your order arrives and an item is damaged, notify HS Tuning within 5 business days after receiving shipment. Make sure to not discard the box(s), packing materials or broken/damaged product(s). If this occasion arises, we require that you obtain a damage claim number from UPS by calling 1-800-742-5877. During the call you will need to supply them with the information from your shipping label. After obtaining a claim number, contact HS Tuning. If a part is missing from your order, you must contact HS Tuning by either by phone at 216-577-7171 or email at This e-mail address is being protected from spambots. You need JavaScript enabled to view it within 5 business days of receiving your shipment. After 5 business days have passed, HS Tuning will no longer be held responsible.

We accept the following payment methods:

Returns, Refunds, Warranty

Returns will not be accepted after 30 days of purchase, and a 15% restocking fee applies to all orders that are not a result of an error made by HS Tuning. Returns will be refused if the part is not:
- In the original packaging and undamaged.
- Product has not been installed.
- Complete with all parts, manuals and print material.

Please note the following parts are not returnable:
- Electrical components
- ECU Software
- Repairs Manuals
- Tools
- Wheels and Tires
- Hand fabricated and custom parts
- All parts identified as special order

Before any item is returned, HS Tuning requires an RMA (Return Merchandise Authorization) number for all returns. RMA numbers can be issued by phone at 216-577-7171 or email This e-mail address is being protected from spambots. You need JavaScript enabled to view it

HS Tuning
Attn: Returns Department
30205 Clemens Road Unit A
Westlake, OH 44145

Your RMA number must be visible on the outside of the packaging in order for your return to be processed properly.

Product Warranty:

HS Tuning offers only quality products to its customers. If your part fails due to defects in workmanship or materials within the first year of ownership, contact HS Tuning and provide us with a copy of your original invoice as proof of purchase. HS Tuning will not refund money, but will work with you to replace or warranty parts. Either HS Tuning or the product manufacturer will test or inspect the product before a warranty claim adjustment is finalized. Any product that fails due to misuse, neglect, unintended application or improper installation will not be covered under any warranty. HS Tuning is not liable for consequential and incidental damages and/or costs incurred of any kind, including those caused by products sold by HS Tuning.

In addition to the parts listed above that are non-returnable, HS Tuning cannot offer any full warranty coverage on wearable mechanical items and electrical components.