Does it require a resistor for hyper flashing?

Resistors? Not necessarily; If you get hyperflash; Replacing signal flasher with an electronic flasher eliminates hyperflash. It's a much easier and cheaper "hyperflash" solution compared to installing resistors for each bulb. On my 2004 truck, I've run led turn signal bulbs with electronic flasher 5+ years problem free. In most cases, electronic flashers are only a few dollars more than stock ones, don't require more than one (you'll need a resistor for each bulb), don't require splicing/tapping wires, don't get hot like resistors, etc..

Will this work in a 2011 Subaru Outback without hyper flash?

Not sure if it will fit on a Subaru but just be aware if you put any LED where a regular bulb exist especially on a blinker you will have a fast blinking problem. LED bulbs will work fine as a brake light or a reverse light. If you are brake light is the blinker as well you will have the same fast blinking problem without installing extra stuff to slow the blinking down

Brand	PHINLION
Item Package Quantity	2
Color	Amber Yellow
Fit Type	Universal Fit
Auto Part Position	Rear
Manufacturer	Phinlion
UPC	751637664874
Item Weight	0.915 ounces
Product Dimensions	1.97 x 0.79 x 0.71 inches
Item model number	7443-3014-72SMD-Y
Is Discontinued By Manufacturer	No
Manufacturer Part Number	7443-3014-72SMD-Y
Mirror Lighting Type	automotive-exterior-turn-signal-light-bulbs
Voltage	12 Volts

7440/7443/7444 LED Bulbs

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