Join Date: Apr 2004
Location: Astatula, FL, USA
The PIAA literature claims higher output with the same power draw. They shouldn't affect the stock wiring. However, BMW uses the minimal ga. wire for the headlight system, with a shared ground. Best solution is the use relays to activate the headlights, or at the least, install a heavier ground lead for both lamps.
Many on this list, and the original, have found the Phillips, Osram or Silverstar bulbs to be equal, if not better than the PIAA's for less $$$.
'74 R90S '04 K12RS
You rarely see a motorcycle parked outside a psychiatrist's office......