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Discussion Starter #1
Hey, new here having picked up a Mini Cooper s checkmate to replace my S3 I managed to knock up at Nürburging last year!

Looking to follow the usual route with pulley upgrade but this looks like it needs an intercooler upgrade for some track use!

Narrowed it down to 2. GRS or ProAlloy. Seems to be allot of opinions on both but no actual hard figures or testing.

Anyone here used both and have any data/knowledge on which is the best buy?

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