Oooh! Induction kits.

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.a REAL can of worms to open.

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I have used the Vipers in the past: for 2 reasons:

Firstly, I wanted a sealed inlet of cold air.

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and secondly.

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.I love Carbon Fibre.

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That was on my Mk1 NA.

On the Mk3 V6, I have a thing called the K+N Apollo: this is a sealed unit, very much like the Viper, with a 70mm cold air feed, and its made of plastic

(good quality.

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.pretty.

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.but STILL plastic!) rather than CF.

TBH, any decent quality filter, supplied with a good feed of cold air, is going to be OK.

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.the main thing

(besides the cold air!) is the quality of filtration.

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.thats the real killer spec.

Loads of the Ebay

/ chinese cone filters are advertised as

"high flow, increase horsepower" etc, etc.

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.but most of them do this by having bigger holes

/ less resistance to the airflow.

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.and this invariably lets particles through.

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Personally, I trust K+N: they are tried and tested, so I buy their filters.

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If you want greater airflow capacity.

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.I simply fit a bigger filter.

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For a while, when I had my MK1 SC conversion, I made a siamese twin OEM MK1b filter, by simply plumbing both of them together.

Now as you have twice the surface area of the original filter, you're doubling the flow capacity of the filters, but maintaining the OEM filtration.

Treat the cheaper filters with caution: I suppose that besides K+N, Pipercross, Apexi, etc are also good, tried and tested.

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.but steer clear of the

"Mushroom filter, Like Apexi" replicas, etc.

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