G1Max

Can I put a hyperwhite bulb for the rear corner running lights, instead of a regular bulb?

gtr_rider

iTrader: (50)

Sure you can, just make sure that they stay dual filament if they are the turn signals or brake lights.

sil SE

iTrader: (21)

do you mean the corner as in the rear side marker bulb?
the little 194?

if you have red clear tails with the red reflector removed in the corner, no bulb will look good (unless LED maybe) because the light will shine into the blinker portion of the tail.