Hey all,
I see where many of us have or are wanting to do LED upgrades, so I thought I would post locations, parts numbers and the source I use for the benefit of the community.
I buy all of my bulbs here:
http://www.vleds.com/
While there are many places to buy LED bulbs (and a lot cheaper than this source), these are quality bulbs that will last, and white bulbs are offered in 5K and 6K color output. For the CTS lighting, I prefer 5K exterior bulbs, as they match the Factory LED lighting much better than 6K bulbs would. For interior, 6K is a better match for the Factory lighting.
Lighting: location, bulb numbers:
Interior vanity lights, 4 required:
These are 6K bulbs, which are a better match than 5K for the interior lighting.
http://www.vleds.com/bulb-type/inte...interior/vanity/6k-white-hi-power-3-chip-2-led-vanity-sun-visor-light-bulb.html

Front side markers, 2 required:
These are #194 amber LEDs. You want to use the same color LED as the lenses for maximum output.
http://www.vleds.com/shop-bulb-numbers/194-168-158-led/6-hv.html

License plate lights, 2 required:
These are #194 5K 160 lumen "flank style" bulbs. When installing, make sure the LED elements point down towards the plate when fully engaged in the housing.
http://www.vleds.com/shop-bulb-numbers/194-168-158-led/flank/194-4-hpf-w-5k-n.html

Reverse lights, 2 required:
These are #921 5K 500 lumen bulbs.
http://www.vleds.com/shop-bulb-numb...21-led/5k-white-15-led-high-power-bulbs-917-918-920-921-922-923-579-1-pair.html

With the exception of the flank style bulbs: LEDs are polarity dependent, so if the bulb does not illuminate, pull it out of the socket and flip it 180 degrees. Test all lighting before reassembly.
End result is these bulbs are bright, crystal white, and compliment the CTS V-Sport Factory lighting really well.
I see where many of us have or are wanting to do LED upgrades, so I thought I would post locations, parts numbers and the source I use for the benefit of the community.
I buy all of my bulbs here:
http://www.vleds.com/
While there are many places to buy LED bulbs (and a lot cheaper than this source), these are quality bulbs that will last, and white bulbs are offered in 5K and 6K color output. For the CTS lighting, I prefer 5K exterior bulbs, as they match the Factory LED lighting much better than 6K bulbs would. For interior, 6K is a better match for the Factory lighting.
Lighting: location, bulb numbers:
Interior vanity lights, 4 required:
These are 6K bulbs, which are a better match than 5K for the interior lighting.
http://www.vleds.com/bulb-type/inte...interior/vanity/6k-white-hi-power-3-chip-2-led-vanity-sun-visor-light-bulb.html

Front side markers, 2 required:
These are #194 amber LEDs. You want to use the same color LED as the lenses for maximum output.
http://www.vleds.com/shop-bulb-numbers/194-168-158-led/6-hv.html

License plate lights, 2 required:
These are #194 5K 160 lumen "flank style" bulbs. When installing, make sure the LED elements point down towards the plate when fully engaged in the housing.
http://www.vleds.com/shop-bulb-numbers/194-168-158-led/flank/194-4-hpf-w-5k-n.html

Reverse lights, 2 required:
These are #921 5K 500 lumen bulbs.
http://www.vleds.com/shop-bulb-numb...21-led/5k-white-15-led-high-power-bulbs-917-918-920-921-922-923-579-1-pair.html

With the exception of the flank style bulbs: LEDs are polarity dependent, so if the bulb does not illuminate, pull it out of the socket and flip it 180 degrees. Test all lighting before reassembly.
End result is these bulbs are bright, crystal white, and compliment the CTS V-Sport Factory lighting really well.