31600012 Diamondfire Spark Plugs
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Specifications
- Brand
- E3 Spark Plugs
- Part Number
- 757644
- OEM Reference
- 31600012
- Pack Quantity
- Each
- Category
- Spark Plugs
- VAT Rate
- 20%
About This Product
For riders on late-model Milwaukee-Eight or Twin Cam machines, these E3 DiamondFIRE spark plugs offer a high-tech alternative to standard ignition components. The DiamondFIRE configuration uses a unique chimney effect to pull the next air-fuel charge into the spark zone, while the forced edge-to-edge discharge ensures a consistent, powerful spark every time. This design reduces the travel time for the flame kernel, resulting in a more efficient burn and better engine performance. These plugs are a natural fit for Softail, Street, Touring, and Trike models and serve as a performance replacement for OEM 31600012.
Fitment
74 modelsSoftail | Street | Touring | Trike
Softail 35 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2017 | BREAKOUT FXSB |
| Harley-Davidson | 2018–2026 | Breakout® FXBR |
| Harley-Davidson | 2017 | DELUXE FLSTN |
| Harley-Davidson | 2017 | FAT BOY FLSTF |
| Harley-Davidson | 2017 | FAT BOY LO FLSTFB |
| Harley-Davidson | 2017 | FAT BOY S FLSTFBS |
| Harley-Davidson | 2018–2026 | Fat Boy® FLFB |
| Harley-Davidson | 2025 | Fat Boy® Gray Ghost FLSTFI |
| Harley-Davidson | 2018–2026 | Heritage Classic FLHC |
| Harley-Davidson | 2017 | HERITAGE SOFTAIL CLASSIC FLSTC |
| Harley-Davidson | 2020–2026 | Low Rider® S FXLRS |
| Harley-Davidson | 2022–2026 | Low Rider® ST FXLRST |
| Harley-Davidson | 2017 | SLIM FLS |
| Harley-Davidson | 2017 | SLIM S FLSS |
| Harley-Davidson | 2018–2022 | SOFTAIL BREAKOUT 114 FXBRS |
| Harley-Davidson | 2018 | SOFTAIL BREAKOUT 114 ANNIVERSARY FXBRS ANX |
| Harley-Davidson | 2018–2020 | SOFTAIL DELUXE FLDE |
| Harley-Davidson | 2018–2020 | SOFTAIL FAT BOB FXFB |
| Harley-Davidson | 2018–2024 | SOFTAIL FAT BOB 114 FXFBS |
| Harley-Davidson | 2018–2024 | SOFTAIL FAT BOY 114 FLFBS |
| Harley-Davidson | 2018 | SOFTAIL FAT BOY 114 ANNIVERSARY FLFBS ANV |
| Harley-Davidson | 2018 | SOFTAIL FAT BOY 114 ANNIVERSARY FLFBS ANX |
| Harley-Davidson | 2020–2023 | SOFTAIL FAT BOY ANNIVERSARY FLFBSANV |
| Harley-Davidson | 2019–2020 | SOFTAIL FXDR 114 FXDRS |
| Harley-Davidson | 2018–2024 | SOFTAIL HERITAGE CLASSIC 114 FLHCS |
| Harley-Davidson | 2018 | SOFTAIL HERITAGE CLASSIC 114 ANNIVERSARY FLHCS ANV |
| Harley-Davidson | 2023 | SOFTAIL HERITAGE CLASSIC ANNIVERSARY FLHCSANV |
| Harley-Davidson | 2024 | SOFTAIL HYDRA-GLIDE REVIVAL FLI |
| Harley-Davidson | 2018–2020 | SOFTAIL LOW RIDER FXLR |
| Harley-Davidson | 2022 | SOFTAIL LOW RIDER EL DIABLO FXRST |
| Harley-Davidson | 2018–2021 | SOFTAIL SLIM FLSL |
| Harley-Davidson | 2018–2024 | SOFTAIL SPORT GLIDE FLSB |
| Harley-Davidson | 2020–2024 | SOFTAIL STANDARD FXST |
| Harley-Davidson | 2021–2024 | SOFTAIL STREET BOB 114 FXBBS |
| Harley-Davidson | 2018–2026 | Street Bob® FXBB |
Street 2 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2017–2020 | STREET STREET 500 XG500 |
| Harley-Davidson | 2017–2020 | STREET STREET 750 XG750 |
Touring 30 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2026 | CVO™ Street Glide® FLHXSE |
| Harley-Davidson | 2026 | CVO™ Street Glide® Limited FLHXLSE |
| Harley-Davidson | 2026 | CVO™ Street Glide® ST FLHXSTSE |
| Harley-Davidson | 2017–2026 | Road Glide® FLTRX |
| Harley-Davidson | 2026 | Road Glide® Limited FLTRXL |
| Harley-Davidson | 2017–2026 | Street Glide® FLHX |
| Harley-Davidson | 2026 | Street Glide® Limited FLHXL |
| Harley-Davidson | 2023 | TOURING ELECTRA GLIDE HIGHWAY KING FLHFB |
| Harley-Davidson | 2019–2022 | TOURING ELECTRA GLIDE STANDARD FLHT |
| Harley-Davidson | 2017–2019 | TOURING ELECTRA GLIDE ULTRA CLASSIC FLHTCU |
| Harley-Davidson | 2021 | TOURING REVIVAL FLH |
| Harley-Davidson | 2023 | TOURING ROAD GLIDE ANNIVERSARY FLTRXSANV |
| Harley-Davidson | 2020–2024 | TOURING ROAD GLIDE LIMITED FLTRK |
| Harley-Davidson | 2017–2023 | TOURING ROAD GLIDE SPECIAL FLTRXS |
| Harley-Davidson | 2022–2023 | TOURING ROAD GLIDE ST FLTRXST |
| Harley-Davidson | 2017–2019 | TOURING ROAD GLIDE ULTRA FLTRU |
| Harley-Davidson | 2017–2022 | TOURING ROAD KING FLHR |
| Harley-Davidson | 2017–2019 | TOURING ROAD KING CLASSIC FLHRC |
| Harley-Davidson | 2017–2025 | TOURING ROAD KING SPECIAL FLHRXS |
| Harley-Davidson | 2018 | TOURING STREET GLIDE ANNIVERSARY FLHX ANV |
| Harley-Davidson | 2023 | TOURING STREET GLIDE ANNIVERSARY FLHXSANV |
| Harley-Davidson | 2017–2023 | TOURING STREET GLIDE SPECIAL FLHXS |
| Harley-Davidson | 2018 | TOURING STREET GLIDE SPECIAL ANNIVERSARY FLHXS ANX |
| Harley-Davidson | 2022–2023 | TOURING STREET GLIDE ST FLHXST |
| Harley-Davidson | 2025 | TOURING STREET GLIDE ULTRA FLHXU |
| Harley-Davidson | 2017–2024 | TOURING ULTRA LIMITED FLHTK |
| Harley-Davidson | 2018 | TOURING ULTRA LIMITED ANNIVERSARY FLHTK ANV |
| Harley-Davidson | 2023 | TOURING ULTRA LIMITED ANNIVERSARY FLHTKANV |
| Harley-Davidson | 2017–2019 | TOURING ULTRA LIMITED LOW FLHTKL |
| Harley-Davidson | 2017–2023 | TOURING ULTRA LIMITED SHRINE EDITION FLHTK SHRINE |
Trike 7 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2026 | CVO™ Street Glide® 3 Limited FLHLTSE |
| Harley-Davidson | 2023–2026 | Road Glide® 3 FLTRT |
| Harley-Davidson | 2026 | Street Glide® 3 Limited FLHLT |
| Harley-Davidson | 2017–2025 | TRIKE FREEWHEELER FLRT |
| Harley-Davidson | 2017–2025 | TRIKE TRI GLIDE ULTRA FLHTCUTG |
| Harley-Davidson | 2018 | TRIKE TRI GLIDE ULTRA ANNIVERSARY FLHTCUTG ANV |
| Harley-Davidson | 2023 | TRIKE TRI GLIDE ULTRA ANNIVERSARY FLHTCUTGANV |
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