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Sports Cats - The benefits?


A8_Tony
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Hi all, after P_G posted about getting some sports cats as replacements for my fecked ones.....it got me to thinking.

What are the benefits, both real and perceived? I don't want to spend money on sports cats unless there's a real good reason (more power being an obvious one smile.gif )

Cheers fellas 169144-ok.gif

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it was a very sweeping/ generic answer, but he was referring to the milltek sports cats.

i know the S3 sports cats offer no performance increase, just might aid response and spool up of the turbo.

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It depends on the car. It seems on 1.8T's that they really only come into their own on 300bhp+ cars.

On the 4.2 the main restriction seems to be about breathing and the sport cats do help that.

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I was also led to believe that it far better suits large capacity engines.

Lets it breathe more easily with less restriction. I know it has made a significant difference in the performance of my car albeit that Audi's wizadry has robbed mine of some of its power recently. Driveability was much better torque wise, bhp was up a bit.

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[ QUOTE ]

What are the benefits, both real and perceived? I don't want to spend money on sports cats unless there's a real good reason (more power being an obvious one smile.gif )

Cheers fellas 169144-ok.gif

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I think a sport cat will cost you less money than a standard one from Audi!,

Most VAG group performance car use metal cats like found in performance unit as standard

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[ QUOTE ]

[ QUOTE ]

What are the benefits, both real and perceived? I don't want to spend money on sports cats unless there's a real good reason (more power being an obvious one smile.gif )

Cheers fellas 169144-ok.gif

[/ QUOTE ]

I think a sport cat will cost you less money than a standard one from Audi!,

Most VAG group performance car use metal cats like found in performance unit as standard

[/ QUOTE ]

you're not wrong there fella. So far the best quote I've had has been £650 for 2 sports cats 169144-ok.gif Compare that to £1k/side and very quickly the sums are in favour of adding the sports laugh.gif

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funny you mention that, the new RS4 was in conversation at the time.

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I guess it makes sense. The RS4 should be the most opitmised car with the 4.2 so I would expect smaller benefits of tuning/after market mods as Audi will have taken it closer to the limit already.

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Agreed, if you talk to Milltek I don't think they've many advances in power output, just in depth and volume of the exhaust note and thats by adding valves to the system. I think their almost straight through added 15-20bhp but in terms of ratios the percentage increase is less than with the S4 system.

But even so it is not significantly different as say for example in converting an S4.

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