On the S3 an exhaust does not really bring any gains in terms of what you would see in improvement of BHP or Torque, but you may feel the car revs a little easier and that you have more low down torque, but the main improvement has to be sound /ubbthreads/images/graemlins/1luvu.gif
You can try a search on here for the various discussions on exhausts on the S3, and what peoples opinions are as to the benifits.
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why do you say "some gains" because after chip i am sure that will be more than "some" back presure due to increasted turbo presure.
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S3 has twin cats as standard (cats in parallel reduces back pressure) so replacing them wont give you huge gains as they were well designed to begin with.
Common belief that the restriction in the S3 exhaust is the manifold/downpipe - not the exhaust.
Common belief that the restriction in the S3 exhaust is the manifold/downpipe - not the exhaust.
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And even on that it would appear more to be the manifold, and even then the system really doesn't need much cahnging unless a new larger turbo's fitted from what i know......however on an A3 the downpipe is the most restrictive part.
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