Morimoto 2Stroke 4.0 LED Review
A disciplined, premium reflector LED with excellent glare control, a clean 5250K beam, proper DRL dimming, and a limited lifetime warranty—but projector output is the important limitation.
- Reflector performance
- 3.9BulbFacts score · 5.0 baseline
- Projector performance
- 1.3BulbFacts score · 5.0 baseline
- Measured output
- 1,553 lmper bulb · 3,106 lm per kit
- Color temperature
- 5,250 Kmeasured
Our verdict
The Morimoto 2Stroke 4.0 suits a reflector-headlight owner who values controlled beam shape, exceptionally low measured glare, proper DRL dimming, low heat, and premium support more than maximum output. It performed well in our reflector reference housing but was materially weaker in the projector test, so housing type is central to the buying decision.
What we liked
- A 5/5 reflector beam-pattern rating with only 90 lux of measured glare.
- Strong, focused reflector output: 889 lux on low beam and 1,872 lux on high beam.
- Clean 5250K color, proper DRL dimming in our test, controlled heat, and limited lifetime coverage.
What to consider
- Projector performance was much weaker, including a high-beam result 23% below the recorded halogen baseline.
- At about $178 per set, this is still a premium choice rather than a maximum-output value pick.
- The fan, external driver, and rear dimensions require clearance checks; exact-vehicle fitment and CANBUS behavior are not guaranteed.
Build quality
The 2Stroke 4.0 is not designed to win by brute force. Its slim flat diode boards, OSRAM Oslon Black Flat S emitters, external driver, and internal circulating cooling system reflect a more deliberate focus on beam placement and controlled heat.
The hardware feels intentional rather than generic, and the connections, driver, and cooling assembly are neatly finished. Those construction details support confidence in the product, but the measured reflector and projector results below—not the brand or packaging—determine our recommendation.
Reflector headlight performance
This is where the 2Stroke 4.0 makes its case: strong usable output, a concentrated hotspot, a 5/5 beam-pattern rating, and the lowest recorded glare result in the current comparison set.
About these tests: The reflector and projector measurements below come from BulbFacts reference housings so products can be compared consistently. They are not exact-vehicle tests; bulb seating, housing optics, lens condition, and aim can change output, glare, and beam shape. The selected-vehicle panel above remains the source for any known applicability evidence.
Gray dots show every scored kit. Named markers are current BulbFacts recommendations. The 5.0 reference is a baseline, not a maximum.
Reflector performance score 3.9 compared with 54 scored LED kits and the 5.0 reference baseline.
- Low-beam hotspot
- 889 luxper bulb
Reflector low-beam output of 889 lux compared with 54 scored products.
- High-beam output
- 1,872 luxper bulb
Reflector high-beam output of 1,872 lux compared with 54 scored products.
- Glare measurement
- 90 luxreference housing
Reflector glare measurement of 90 lux compared with 22 products with recorded glare data. Lower is better.
- Beam pattern
- 5 / 5separate pattern rating
Reflector beam-pattern rating of 5 out of 5 compared with 22 products with recorded ratings. Higher is better.
Low beam measured 889 lux at 25 feet, which was 138% above the recorded standard-halogen baseline and about 75% above the Sylvania SilverStar Ultra result used in the original comparison.
The hotspot stayed focused and the beam avoided the scattered look that hurts many LED conversions. Glare measured only 90 lux, the lowest recorded result in the current comparison set, while the separate beam-pattern rating was 5/5.
High beam measured 1,872 lux, or 114% above the recorded halogen baseline. A few aggressive kits produce more raw output, but the Morimoto result kept the light disciplined. Exact results still depend on the vehicle's optics, bulb seating, lens condition, and aim.
Projector headlight performance
The 2Stroke 4.0 improved projector low beam over the recorded halogen baseline, but its high-beam output was weaker than halogen. This is a reflector-first LED kit.
Gray dots show every scored kit. Named markers are current BulbFacts recommendations. The 5.0 reference is a baseline, not a maximum.
Projector performance score 1.3 compared with 54 scored LED kits and the 5.0 reference baseline.
- Low-beam hotspot
- 308 luxper bulb
Projector low-beam output of 308 lux compared with 54 scored products.
- High-beam output
- 341 luxper bulb
Projector high-beam output of 341 lux compared with 54 scored products.
- Beam pattern
- 3 / 5separate pattern rating
Projector beam-pattern rating of 3 out of 5 compared with 47 products with recorded ratings. Higher is better.
Projector low beam measured 308 lux, about 35% above the recorded halogen baseline. That is an improvement, but it is not a large one compared with the stronger projector products in the chart.
High beam measured 341 lux, about 23% below the recorded halogen baseline. The separate projector beam-pattern rating was 3/5, and projector glare was not recorded.
Projector optics can be sensitive to emitter position, width, and focus. These results do not make the 2Stroke 4.0 a poor product, but they do make its housing-dependent limitation clear: buyers prioritizing projector brightness should start with a stronger projector performer.
Output, color, and stability
The 2Stroke 4.0 does not chase a huge lumen number. Its strengths are a clean white 5250K color and an unusual increase in output during the recorded warm-up test.
Morimoto 2Stroke 4.0 Kelvin
Morimoto 2Stroke 4.0 lumens
We measured 5250K, a clean white without an overly blue tint. That can be more useful than a very blue-looking bulb in rain, snow, fog, or on wet pavement.
Total output measured 1,553 lumens per bulb, or 3,106 lumens per kit. The result is modest beside aggressive high-output kits, but it is consistent with this product's focus on beam placement rather than maximum raw output.
Output increased during the recorded warm-up run: about 1,550 lumens initially, about 1,660 lumens at two minutes, and about 1,870 lumens at 30 minutes. Because the test recorded an increase rather than a drop, no warm-output drop percentage is assigned.
Installation and cooling
The low 22.6-watt draw and controlled temperature are practical strengths, but the rear fan, bulb dimensions, and separate driver still require careful clearance and electrical checks.
Per-bulb draw
The 2Stroke 4.0's 22.6-watt-per-bulb result is compared with 54 LED kits recorded from 11.9 to 95.6 watts per bulb and the 53-watt halogen reference.
30-min temp
The 2Stroke 4.0's 132-degree result is compared with 54 LED kits recorded from 80 to 166 degrees Fahrenheit. The visual scale extends to the 525-degree halogen reference.
Fan noise
The 2Stroke 4.0's 60-decibel result is compared with 54 LED kits, including fanless products and fan measurements up to 71 decibels. The halogen reference has no cooling fan.
Physical size and fit
The bulb measures 36 mm at its widest point, 38 mm from the base to the rear, and 40 mm across the diode-handle dimension. The separate driver measures 38 × 60 × 20 mm. The product is listed as rotatable in 1-degree increments, but H7-specific collar behavior was not separately recorded.
The chart lists many available bulb sizes, but matching a nominal size does not confirm fitment. Check the bulb type, seating, rear clearance, driver placement, dust-cover space, and vehicle electronics before ordering.
Power draw and cooling
We measured 22.6 watts per bulb on the test bench. The 45.2-watt pair total is derived from that per-bulb measurement.
After 30 minutes, running temperature measured 132°F / 56°C at the heat sink. Morimoto's internal circulating fan moves air around the front PCB area and inside the housing. This short bench result is not a long-term durability result.
Noise and electronics
Fan noise measured about 60 dB at roughly one foot on the bench, where it was audible when listening for it. We did not record cabin noise after installation, so in-vehicle sound remains unknown.
The product properly dimmed during recorded low- and high-beam DRL testing. CANBUS behavior is listed as may need a decoder based on the vehicle, so the bench result is not a universal compatibility guarantee. Radio-frequency interference remains N/A.
Warranty and long-term testing
Coverage
The 2Stroke 4.0 is listed with lifetime coverage in the current LED chart. Listed coverage is not a measured durability result.
The product is listed with a limited lifetime warranty. That is manufacturer or seller coverage, not evidence of measured lifespan; confirm current terms, exclusions, and the claim process before ordering.
Long-term lifespan remains N/A because a final runtime rating is not complete. Low draw, controlled heat, experience with the earlier 2Stroke line, and warranty coverage support a positive expectation, but none replaces a completed durability test.
Should you buy it?
Buy the 2Stroke 4.0 if you have a reflector-style headlight and care more about disciplined beam placement, exceptionally low glare, proper DRL dimming, controlled heat, and premium warranty coverage than winning the raw-output chart.
The main tradeoff is projector performance. Its projector low beam offered only a modest gain and its projector high beam measured below the recorded halogen baseline. The approximately $178 price, external driver, fan, and possible decoder requirement also matter before ordering.
Consider a different product if maximum reflector output, strong projector performance, a lower price, confirmed exact-vehicle compatibility, or completed lifespan data matters more. The 2Stroke 4.0 remains a responsible premium reflector pick, but its reference-housing result is not a guarantee for every vehicle.
If those tradeoffs work for your vehicle, check the current price or compare the test results before deciding.
Full measurements and specifications
Open this reference for every recorded measurement, specification, unknown, and test-method detail. The main reflector and projector findings remain visible above.
Show all recorded measurements and specificationsFive groups · version 2.1 bench record
Measured output
- Reflector performance score
- 3.9; 5.0 reference baseline
- Reflector low-beam hotspot
- 889 lux per bulb
- Reflector low-beam improvement
- 138% over recorded halogen baseline
- Reflector high-beam output
- 1,872 lux per bulb
- Reflector high-beam improvement
- 114% over recorded halogen baseline
- Projector performance score
- 1.3; 5.0 reference baseline
- Projector low-beam hotspot
- 308 lux per bulb
- Projector low-beam improvement
- 35% over recorded halogen baseline
- Projector high-beam output
- 341 lux per bulb
- Projector high-beam improvement
- 23% below recorded halogen baseline
- Measured lumens
- 1,553 lm per bulb; 3,106 lm per kit
- Lumen improvement
- Not recorded in this review
Beam quality
- Reflector beam-pattern rating
- 5 / 5 in current test record
- Projector beam-pattern rating
- 3 / 5
- Reflector glare measurement
- 90 lux in the reference housing
- Projector glare measurement
- Not recorded in this review
Power, color, and thermal behavior
- Measured color temperature
- 5,250 K
- Measured electrical draw
- 22.6 watts per bulb
- Derived pair draw
- 45.2 watts per pair
- 30-minute running temperature
- 132°F / 56°C
- Cold-start to 30-minute output drop
- N/A; output increased in the recorded test
- 2-minute to 30-minute output drop
- N/A; output increased in the recorded test
- Fan noise
- 60 dB at about one foot on the bench
- Cooling method
- Fan; internal circulating design
Dimensions, features, and recorded compatibility
- Maximum bulb width
- 36 mm
- Base-to-rear dimension
- 38 mm
- Diode-handle dimension
- 40 mm
- Rotatable H7 collar
- H7-specific status not separately recorded; product listed as rotatable in 1° increments
- LED diodes
- OSRAM Oslon Black Flat S
- Emitter layout
- 6 per color; 12 total per bulb; flat direction
- Driver configuration
- External, non-removable; 38 × 60 × 20 mm (W × L × D)
- Recorded product sizes
- H1, H3, H4, H7, H8, H9, H10, H11, H13, 9003, 9004, 9005, 9006, 9007, 9008, 9012, 5202, 880, D2S, D2R
- CANBUS behavior
- May need decoder based on vehicle; not a universal compatibility guarantee
- Exact-vehicle fitment
- Unconfirmed; verify bulb type, seating, rear clearance, driver placement, and dust-cover space
- Housing context
- Reflector-first result in reference housings; not an exact-vehicle test
Warranty and test status
- Estimated price
- About $178 per set
- Recorded warranty
- Limited lifetime listed coverage
- Long-term lifespan
- N/A; final runtime testing incomplete
- DRL / high-beam dimming
- Yes in the recorded bench test
- Radio-frequency interference
- N/A; unconfirmed
- High-beam test photographs
- Available for both reference housings
- Publication date
- Sept. 17, 2024
- Last updated
- May 31, 2026
- Test version
- Version 2.1 bench record
Facts listed above are based on BulbFacts testing processes at the time of this review. See how we test for current procedures. Test procedure 2.1 used 25 ft distance testing, with glare measured at 9 ft distance, 2.64 in up from center focal, and 2.85 in left from center focal.