Trusted by Riders for Nearly 25 Years.
Delivering premium lighting designed for maximum performance, simple installation, and years of dependable riding.
Trusted by Riders for Nearly 25 Years.
Delivering premium lighting designed for maximum performance, simple installation, and years of dependable riding.
Select your ride! Suggested fitment for U.S. models only.
GEN-4-R-1157
Fitment for U.S. models only, unless otherwise noted.
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Custom Dynamics® Genesis® 4 Solid Red Motorcycle LED Turn Signals offer 48 super bright red LEDs per unit, providing a brighter light output and wider viewing angle than even the original Genesis® LED turn signal inserts! The full cluster of 48 red LEDs illuminates as a dim running light; When brake is activated all 48 red LEDs go to full intensity illumination for maximum visibility. 1157 pigtail bulb base for plug and play rear turn signal applications.
Custom Dynamics® red, smoked or clear motorcycle turn signal lens (sold separately) required for proper installation. OEM lenses are not compatible.
Warning: Cancer & Reproductive Harm — www.p65warnings.ca.gov
Plug & Play for rear turn signals on Harley-Davidson® US models with 1157 dual contact bases (models without center taillight) and Bullet Style (pop-off) lens and 2009-2012 Street Bob®.
SMART Signal Stabilizer™ (sold separately) is required on 2013 & Earlier Sportsters®, 2011 & Earlier Dynas®, 2010 & Earlier Softails®, 2013 & Earlier H-D™ Touring and H-D™ Trikes and all V-Rod® Models to ensure proper function and flash speed of LED Turn Signals.

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It’s an excellent product 👍👍
Excellent product. Exceptional bright!
Worth every bit of the price
Thank you for the tail light upgrade, worked out great and it looks exactly how I had hoped!
Great brilliance. Added safety feature when riding.
I installed these on my 21 road glide and I love them, much more visible to people behind me. Great quality, easy installation! I paired them with the Custom Dynamics Plasma Rods and the TriBar LED with the brake light modulator! Looks great and I feel greatly reduces the chances of somebody running me flat on the road
The custom dynamics LED tail bulbs are the best product out there. If you buy the $30 pair from Amazon, they’re made with old school LEDs that look like they’re lit when they’re not. These lights are great, greater visibility, very visible. I highly recommend. In this video, you see them paired up with the plasma rods, and the brake light modulator all from Custom Dynamics!
Great addition to be seen! I went with full red tails, turn and brake not ghost ring. Super bright!
These are a good fit for my 2019 Street Glide Special and I like the full bright (no halo) LED pattern. Turn signal and brake light illumination is extremely bright compared to the running light function and will force anyone behind you to see you and know that you're stopping or turning. I'd purchased some cheaper solid (kuryakyn tracer style) lights on eBay but the illumination difference between running light and brake light was barely noticeable; enough that I didn't feel safe knowing people behind me might not be able to tell whether I'm braking or not. These Custom Dynamics leave no doubt when I'm hitting the brakes!
These are way brighter than the stock bulb. You need to be seen on motorcycles so bad things don't happen. 5 min install.
Whoo Hooo! A huge improvement over the stock bulbs! These Genesis 4 solid LED's are very bright plus it took less than 15 minutes to install them on my 2018 Fat Bob 114 (FXFBS).
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