I have 7mm f, 15mm r (or are they 14... I forget). No problems whatsoever. They maybe, possibly, perhaps, might increase handling by a small amount. But the major benefit is looks, IMHO. I put them on between the last track session last year and the first one this year, but I also changed tires and installed the M030 suspension at the same time, so I can't attribute any handling increases to any single component. They certainly make it look better though.
Bob
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79 911SC Targa.. gone but not forgotten
2001 Boxster Black/Savanah Beige
RoW M030 suspension
7/15 mm spacers
Deambered
Desnorked
SS door sills
Debadged
Clear tails
Technobrace
Technobra
I'll never own another black car!
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