Experience of these on a standard car (MK2 16v golf GTi, MR2, Z4,... and a 2.0 TDi A3 which was remapped) was I didn't really notice any difference, whereas cooling the air to make it more dense as mentioned above reaps better rewards.
I've also heard that the filter must be dried properly...
I run a set of 17" 225 50 TT Dunlop winter tyres on my black edition A3 - sit further out but don't rub
However u may have some challenges with any of the 18" & above TT rims with the offset, so be careful
Ive had my A3 170TDi modified for over 4 months now and despite searching the net there seemed literally no write up from anyone with their personal experiences at that time.
The car's run in, privately owned from new in March 07 with 33k on the clock enjoyed every mile
So do you get...
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