7000K HID Bulbs

D3S: Osram Xenarc 66340 Cool Blue Boost


PART #: 1 x B51

[ In Stock: 0 pieces ]


Product Details

Best of the Best: Osram's CBI and CBH bulbs are top performers in their category, with an amazing amount of white bright paired with max lumin Osity; they're topped only by the Osram CBB (Cool Blue Boost) AKA the cream of Osram's crop.

Brightest: In a recent comparison test, the Osram Cool Blue Boost bested the CBH, CBI, and standard by a solid margin. Forget about the fancy names and Kelvin ratings Osram is assigning, these things are simply the best & brightest bulb that Osram currently makes for use in your D2S headlight! (CBB = 460 Lux, CBH = 415 Lux, CBI = 340 Lux, Standard = 315 Lux) Check out our formal review VIDEO!

7000K? So Osram rates these bulbs at 7000K, which is actually quite blue... But in our own testing, we found the CBB to have no more "blue" color to it compared to the CBH (which they rate at 6000K) and/or the CBI (which they rate at 5500K) - in this case, it seems that Osram is actually playing into the common misnomer that Kelvin rating = brightness by rating the bulbs accordingly higher. Weird!

Backed: Bottom line? Though the CBB is new and yet to be tested by the masses, the popularity of their siblings (CBI and CBH) indicates to us that these are going to be extremely popular given the fact that they're considerably brighter, and only marginally more expensive than the alternatives. If you're looking for the best set of D3S headlight bulbs and aren't afraid to spend a few more bucks to get it, look no further, folks.

Genuine: The Retrofit Source is proud to offer these bulbs in their original retail packaging from Osram. We pride ourselves on being one of the last few distributors shipping genuine Philips & Osram lamps in the US. It is estimated that 80% of these bulbs sold through outlets such as eBay or Amazon are fakes.

Overview Video: Check out this helpful video to see how the Osram bulbs compare.

Trusted: For more than a decade, we've worked hard to earn our killer reputation. Car guys world-wide know that TRS carries the internet's best selection of high performance automotive and powersport lighting products at the best prices, and we've got the best, most knowledgeable team of real enthusiasts to help back it up. If we sell it, then you bet we've put it to the test on our own cars, trucks, and bikes. Need a recommendation on parts for your project? Got a tech question? Wholesale inquiry? Contact Us

Product Specs

  • Compatibility


  • OSRAM PART #: 66340 / 66340HBI

  • PHILIPS PART #: 42302, 42302XV, 9285335244

  • AUDI PART #: 0903110500

  • FORD PART #: 7L7Z13N021A / 7L7Z-13N021-A

  • Tech Specs

  • Bulb Size: D3S (PK32D-5)

  • Intensity: 3,400lm (est.)

  • Power: 35w

  • Color Rating: Up to 7000K (Pure White)

  • Rated Lifespan: 2,500hrs (3-5yrs)

Product Reviews

5 out of 5 stars

4 Reviews   Write a Review

5 out of 5 stars

2016 Volvo XC60 R-Design - Great light output and color

Timothy Choi

These bulbs ROCK! My stock bulbs were alright, but it had a yellowish tint (like a halogen), and didn't match the white LED Running lights I have, but now it matches, and bulb color is whole lot brighter, crisper and whiter than the stock 4300K HID Bulbs these replaced. At 7000K, I thought it might be a bit too blue, but it's definitely not blue at all. I thought the TRS review video accurately depicts and compares these awesome Osram Xenarc 66340 CBB with other brands.

5 out of 5 stars

Awesome sauce!

Timothy Choi

I swapped out the original HID bulbs with these on my 2016 Volvo XC60 R-Design Platinum to bring up the color temp from 4.3k, and to match my LED running lights.

Best upgrade I've done so far. They are freakin' bright and the color is just right. Not too blue at all, and definitely far superior to my factory bulbs that had a bit of yellow tinge (4.3K).

I would highly recommend anyone on the fence on these bulbs - they are awesome, and way brighter with perfect color temp compared to factory bulbs.

5 out of 5 stars

2017 VW Golf R D3S

Brian J

As always The Retrofit Source's service was amazing. My car prior to this one had factory LED headlights and going to a car with stock OSRAM hid's was slightly disappointing. I have been waiting for these lights to come in and they did not disappoint. Everything TRS said was true. They don't project blue like you would expect from a 7000k bulb but instead the night and day difference between these and my stock Osram's is remarkable. Cleaner, brighter, whiter light that illuminates more and farther. I am glad I waited for these. If only I can upload a picture for you to see for yourself.

5 out of 5 stars


Paul-Michael Ralston

2016 Ford Focus RS... installation was very simple. Never quite realized how dull the factory bulbs looked until now. Wanted a better match for the LED "eyebrows" and these are spot on. Definitely a worthwhile upgrade.