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3" Single Cat-back Exhaust
Check this link to see the AudiWorld technical review of this exhaust! This is a big 3" (76mm) system! You can expect a fantastic fit with a mellow sound like some other more mellow (less racy) systems. Expect a horsepower increase of approximately 7-8% and a torque increase of 7%!
Click above image for a larger view
S4 Downpipes/Cats (2000-2002)
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.
Comes as you see along with extension pipes to fit on your existing exhaust system. Of course our phenomenal 3" Milltek cat-back exhaust is a perfect complement to this setup. Actual downpipes as supplied have lamda sensor position after cat section. Sound clip of the full Milltek Downpipes, Cats and Milltek Cat-back Exhaust
Some technical details about the German catalysts in these phenomenal systems: 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 200 ‘cells’ (i.e. channels) per square inch (compared
with 400 per square inch for a standard catalyst). 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. |
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From
the clear leader in S4 exhaust systems Milltek brings you the new SuperDual twin
pipe catback exhaust system. Inspired by Milltek's wildly popular RS4 catback
system sold throughout Europe the SuperDual takes S4 exhaust systems to an even
higher level with the greatest value in the industry. A real twin-pipe system
for under $1300 from the leader in Audi aftermarket exhausts? Believe it. Check
out these great benefits:
Want the ultimate in performance, sound, fit and VALUE for your S4?
Well now you can get it from Stratmosphere. This system is really hot here at
Stratmosphere. Where can you get a 3" system with this type of
performance for $1149? How about 21hp at the wheels? Click the link below...
The
new Milltek S4 Downpipes/Cats set is here! Awesome high-flow technology for your
S4 (2000-2002)). 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.
