Hey guys,
A1RM, being the type of pad they are, will sometimes suffer from some noise in opposed pistons calipers (like the Sumitomo and Brembo, which unfortunately is most performance Subarus!). They RARELY make a noise in single sided sliding calipers, but as with alot of high performance pads, opposed piston caliper don't always agree with them.
The best thing for noise (which is caused by harmonics between the backing plate and the caliper itself) is a soft stick on shim kit, EBC make a universal one (similar to what EBC and TRW pads come with standard), and they're $16.50 per axle set. The goo stuff is ok but is generally only a temporary fix.
Have a read of this post:
http://www.perth-wrx.com/vb/showpost...5&postcount=24
As it explains the pads we're replacing HPX with for high performance street use, and is VERY good on noise, especially in opposed pistons cars, and we sell stack of Remsa for Porsche/Fezzas etc that use race type calipers on the street, but where their owners would never put up with noise.
Otherwise if you plan to keep A1RM as your street pad, either flog the crap out of the pads, turn up the radio, or grab a set of soft stick on shims.
Any questions at all just let me know!
Regards,
Greg