Home » German Auto Stuff - R8 Style Coolant Expansion Tank Cap - TT / TTS / TTRS Mk1 Mk2

German Auto Stuff - R8 Style Coolant Expansion Tank Cap - TT / TTS / TTRS Mk1 Mk2

  • Vendor German Auto Stuff
  • Part # 420121321
$41.99
$46.99 Sale $41.99
Direct Ship
Ships direct from our supplier. 

Secure Checkout

100% Secure SSL Encryption to Protect Your Info

Trusted Payment Options

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

We accept Visa, MasterCard, PayPal, Apple Pay & More

Hassle-Free 30-Day Returns

Return unopened items within 30 days for a refund or exchange.

Description Fitment Guide

Upgrade your Audi TT, TTS, or TTRS with German Auto Stuff's R8 style coolant expansion tank cap. A great way to finish off your engine bay and replace warn out factory caps.

Made from premium materials that will keep your TT looking good for years to come.

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)

Let customers speak for us

from 13 reviews
Forge intake pipe

Some slight modifications to the car and the cold air heat shield was needed but otherwise it fit great. Can really hear her breath now!

Shea Chris
Forge Motorsport - Silicone Turbo Inlet Hose - TT Mk1 225
Very nice!

Love my new side markers - very clean looking and unique in how they flash when turning left or right. The only suggestion I’d make is provide instructions for both installing them and for being very careful with the wire once you disconnect the old light housing Left side went in ok, but I lost the right side into the fender black hole which required me to remove the tire and unscrew most of the lining so I could find the wire!

Jon W.
German Auto Stuff - Clear Side Markers - TT Mk1 1999-2006 - Sequential Amber LED
Perfect!

Very pleased with the replacement floor mats. Excellent quality. Perfect fit.

John Montgomery
Genuine Audi - Carpeted Floor Mats - Front - Black - TT Mk1

Beautiful and amazing fuel pump upgrade for my MK1 Audi TT

L.C.
DeatschWerks - High-Flow Fuel Pump - TT quattro Mk1 / Mk2
Works great

I’m using these in my 8J TT with some Defi gauges. It requires some disassembly of the stock pods to use with these pod adapters, which was the most complicated part of install. Works great. The pod adapters push the gauges out a little further than the photos represent but I found it acceptable.

J
OSIR Design - O-Pod Mono TTMK2 - TT / TTS / TT RS Mk2
Works great

Have had one of these on my 8J TT RS for a few years now. Works great. Installation takes just a few minutes. I only needed to use one of the three available tap ports; I used blue loctite to help ensure the plugs don’t back out (or fall in).

J
Osir Design - O-TAP B - 1.4 / 2.5 Engines
I like them!

This product is fantastic! The smoked side markers look incredible, and the sequential leds are a huge upgrade. Installation was a breeze truly plug-and-play and I had them on in minutes without any hassle. They really modernize the car's look. Highly recommend!

Dan C.
German Auto Stuff - Smoked Side Markers - TT Mk1 1999-2006 - Sequential Amber LED
Perfect Upgrade for My TT Mk1

Totally transformed my 2005 TT Mk1! This German Auto Stuff carbon spoiler looks incredible and was a perfect fit. The quality is outstanding. Installation was quick and easy. My car looks sharp! Highly recommend for any Mk1 owner looking for a premium upgrade!

Dan C.
German Auto Stuff - Carbon Fiber Spoiler - TT Mk1 1999-2006 - Gloss Black
TT parts

Part worked perfectly and arrived on time. I spoke with them before ordering and they took the time to ensure I was receiving the correct part. I will definitely use them again for parts
John M

John Melnick
Forge Motorsport - Silicone Cam Cover Breather Hose 210 - TT Mk1 225

Fit perfectly

Josh
Genuine Audi - Coolant Temperature Sensor Retaining Clip - TT Mk1