Milltek RS6 Catback Exhaust

Milltek introduces their best system ever for the new awesome RS6. Dual 70mm pipes produce awesome power  when combined with chip tuning. Our large bore system is larger than the Audi OEM "sport sound" exhaust option. We make power. These are our finest tips yet. Removable, hand made of the best stainless grade, polished by hand and then chrome plated. This is the way the OEM systems should have sounded. A very muscular sound that stays outside. Hang on for the ride of your life.

RS-6 Downpipes and Cats!

Milltek '02-'0n A6 2.7T Catback Exhaust (fits allroad also)

New system from Milltek that passes through the rear valance just like the factory system. Catback fits 6-Speed and TipTronic cars perfectly. Finally a way to open up the strangulating stock exhaust and bring the effortless torque you are missing along with a nice increase in peak horsepower. Works great with cars that are chipped or stock. Order near bottom of page.

Milltek S6 / A6 4.2 Catback Exhaust and Downpipes(C5 model)

New to the USA this product is a hot one. Similar in design to the new B6 V8 S4 (which makes 15whp gains from the catback exhaust) you can make real gains with an improvement in appearance and sound as well. Never loud, never anything but rewarding and fun. Spouse and sanity friendly with the power you would expect too.

New Milltek Sport downpipes and cats are now available with genuine 200-cell HJS metal race cats.

A6-allroad 2.7T Downpipes/Cats

The Milltek 2.7T Downpipes/Cats set is here! Awesome high-flow technology for your 2.7T A6 or allroad (all model years). Constructed of 60mm stainless with proper fitting of all sensors and mount points. Notice the full flex-pipe construction that insures proper fit, no matter what the temperature the entire system reaches.

Cats are premium quality with continuous stainless steel cores with high precious metal coating for long term emissions control. Tests of this setup by Milltek in the UK were producing an additional 20 ft-lbs of torque on a car with a "Stage 1" chip.

When ordering please indicate the catback exhaust you will be using so that we can attempt to supply adapters when possible.

 Sound clip of the full Milltek Downpipes, Cats and Milltek Cat-back Exhaust on an S4

Some technical details about the German catalysts in this phenomenal system:

These catalysts are made from special stainless steel containing aluminum (called ‘Fecralloy’). This material was developed in England in the 1970’s specifically to provide resistance to oxidation at very high temperatures. The material is used as a very thin strip (2 thousandths of an inch) and is coiled together to make a honeycomb structure. Because the metal strip is so thin, the honeycomb has a very low flow-obstruction. To reduce the flow-obstruction even further, the honeycomb is made with 100 ‘cells’ (i.e. channels) per square inch (compared with 400 per square inch for a standard catalyst and 200 per square inch with another German tuner's cats). The result is that about 85% of the total cross-section is open. The honeycomb is held together by using a special nickel-based brazing material which is applied in a vacuum. The finished honeycomb is then coated with Aluminum Oxide, some rare earth metals and Platinum and Rhodium. The Platinum and Rhodium are applied at a rate of 25 grams per cubic foot, which compares with between 5 and 10 grams per cubic foot for typical US aftermarket items. It is normal practice in Europe to use much higher quantities of precious metals on catalysts, because European gasoline has more impurities in it which gradually poison catalysts. If catalysts with such high levels of precious metals are used with US fuels, the post-catalyst emissions are extremely low and the durability of the catalysts is very good indeed.

One other good point about using catalysts made of metal foil is that they are better at coping with localized overheating than ceramic cats. The metal conducts heat better than ceramic materials, so localized ‘hot-spots’ are avoided. This means that any melting of the catalyst is extremely unlikely, even if it is exposed to rich mixtures as a result of wild cams or modified engine management systems.