Harley Fuel Injection Parts
Harley-Davidson Fuel Injection Parts at JJ Motorsports
Enhance your Harley's EFI system with premium fuel injection parts from JJ Motorsports, featuring throttle bodies, oxygen sensors, high-flow injectors, and MAP sensors for precise fuel delivery and optimized performance on Milwaukee-Eight, Twin Cam, and Touring models. These high-quality components ensure smoother throttle response, better atomization, and dyno-level gains.
Shop Horsepower Inc, ThunderMax, and Feuling Oil Pump Corp fuel injection parts for race-proven reliability. Explore related categories such as Harley air and fuel for air cleaners and jets, or Harley for exhaust and cams to complete your EFI upgrades and unleash V-Twin potential.
Top Harley-Davidson Fuel Injection Parts
- Horsepower Inc Throttle Body Black 51mm 1.71 HPI-51D1-17B – 51mm black throttle body for M8 engines; direct-fit with improved flow for throttle-by-wire setups.
- ThunderMax Oxygen Sensor 309-355 – Wideband O2 sensor for ThunderMax EFI; precise air/fuel monitoring for self-tuning systems.
- Feuling Oil Pump Corp EV 6 Series Fuel Injector M8 6-1 9935 – EV6 injector for Milwaukee-Eight; high-flow for increased fuel delivery on modified Harleys.
- Feuling Oil Pump Corp MAP Sensor 9953 – Manifold absolute pressure sensor; accurate boost/vacuum readings for EFI tuning.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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HORSEPOWER, INC Throttle Body - Black - 58/1.80 HPI-58D6-18B
HORSEPOWER, INC
$884.95If you're running a big-displacement engine that demands serious airflow, your OEM throttle body is likely your bottleneck. The HORSEPOWER, INC 58mm throttle body replaces both the stock throttle body and manifold with a precision-ported unit engineered...10220249- SKU:
- 10220249
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- BASE COLOR:
- BLACK
- UNITS:
- EACH
- BORE SIZE METRIC:
- 58.00 MM
- INTAKE RUNNER LENGTH IMPERIAL:
- 1.80'
- MATERIAL:
- ALUMINUM
- MODEL:
- MAX FLOW I™
- PRODUCT NAME:
- THROTTLE BODY
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- TYPE:
- SINGLE BORE
$884.95Qty in Cart: 0Quantity:Price:$884.95Subtotal: -
HORSEPOWER, INC Injector Fuel - 6.2 gm/sec - Pair HPI-D1NJ-1
HORSEPOWER, INC
$285.95If you're running a large-displacement engine with significant plenum volume, stock injectors will leave performance on the table. The HORSEPOWER, INC 6.2 gm/sec injectors deliver 43% higher flow than OEM units, ensuring your fuel delivery matches the...10220083- SKU:
- 10220083
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- FLOW RATE METRIC:
- 6.20 G/S
- MODEL:
- YELLOW BAND
- PRODUCT NAME:
- FUEL INJECTOR
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
$285.95 -
THUNDERMAX ECM Harness 309-324
THUNDERMAX
$20.95If you're running a ThunderMax ECM on a Dyna, Softail Rocker, or 02-05 V-Rod, this harness solves the real-world challenge of tight ECM clearances without compromising your fuel management system. The 309-324 integrates seamlessly into your factory...10220059- SKU:
- 10220059
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- COMMUNICATION HARNESS
- RIDING STYLE:
- STREET
$20.95 -
HORSEPOWER, INC Intake Flange - '06-'17 Big Twin HPI-IF-6L
HORSEPOWER, INC
$64.95A quality intake flange is foundational to reliable forced induction performance, and material integrity directly impacts longevity under boost. This CNC-machined billet aluminum flange eliminates the cracking and warping issues inherent to forged...10220068- SKU:
- 10220068
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- FEATURES:
- INCLUDES GASKETS
- COLOR/FINISH:
- RAW
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- FLANGE INTAKE
- UNITS:
- SET
- BASE FINISH:
- RAW
- RIDING STYLE:
- STREET
- TYPE:
- FLANGE
$64.95 -
HORSEPOWER, INC Intake Flange - '01-'05 Big Twin HPI-IF-6E
HORSEPOWER, INC
$64.95A reliable intake flange is critical to maintaining consistent boost pressure and preventing costly air leaks in your forced induction setup. This CNC-machined billet aluminum flange eliminates the cracking and warping issues common with forged...10220069- SKU:
- 10220069
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- COLOR/FINISH:
- RAW
- TYPE:
- FLANGE
- BASE FINISH:
- RAW
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- SET
- FEATURES:
- INCLUDES GASKETS
- PRODUCT NAME:
- FLANGE INTAKE
$64.95 -
CYCLE PRO LLC Throttle Sensor 18482
CYCLE PRO LLC
$63.85Achieve maximum fuel efficiency and power from the engine, Direct replacement and upgraded from the OEM design10220254- SKU:
- 10220254
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- SENSOR
- RIDING STYLE:
- STREET
- TYPE:
- THROTTLE
$63.85 -
DAYTONA TWIN TEC LLC Injector - M8 - 5.38 gm/sec 22054
DAYTONA TWIN TEC LLC
$317.95Precision fuel delivery is the foundation of reliable engine performance, and the DAYTONA TWIN TEC LLC M8 Injector delivers exactly that with factory-tested accuracy. Whether you're tuning a race engine or upgrading a street build, matched injector sets...10220216- SKU:
- 10220216
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- FUEL INJECTOR
- FLOW RATE METRIC:
- 5.38 G/S
- RIDING STYLE:
- STREET
- UNITS:
- SET
- SPRAY ANGLE:
- 25°
$317.95 -
DAYTONA TWIN TEC LLC Injector - M8 - 7.79 gm/sec 22078
DAYTONA TWIN TEC LLC
$368.95Precision fuel delivery is the foundation of reliable engine performance, and these Daytona Twin Tec injectors are engineered to maintain exact spray patterns across the full rpm range. Whether you're tuning a street engine or competing at the track,...10220219- SKU:
- 10220219
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- SPRAY ANGLE:
- 25°
- PRODUCT NAME:
- FUEL INJECTOR
- UNITS:
- SET
- FLOW RATE METRIC:
- 7.79 G/S
- RIDING STYLE:
- STREET
$368.95 -
DAYTONA TWIN TEC LLC Injector - M8 - 8.49 gm/sec 22085
DAYTONA TWIN TEC LLC
$371.95Precision fuel delivery is the foundation of reliable engine performance, and the DAYTONA TWIN TEC LLC M8 Injector ensures your engine receives exactly the right amount of fuel at the right time. Whether you're tuning a naturally aspirated build or...10220220- SKU:
- 10220220
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- FLOW RATE METRIC:
- 8.49 G/S
- PRODUCT NAME:
- FUEL INJECTOR
- SPRAY ANGLE:
- 25°
- RIDING STYLE:
- STREET
- UNITS:
- SET
$371.95 -
DAYTONA TWIN TEC LLC Injector - M8 - 9.22 gm/sec 22092
DAYTONA TWIN TEC LLC
$382.95Precision fuel delivery is the foundation of any high-performance engine tune. The DAYTONA TWIN TEC LLC M8 injectors ensure consistent atomization and flow across your entire fuel map, eliminating the guesswork that comes with mismatched injector sets...10220221- SKU:
- 10220221
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- FLOW RATE METRIC:
- 9.22 G/S
- PRODUCT NAME:
- FUEL INJECTOR
- SPRAY ANGLE:
- 25°
- UNITS:
- SET
- RIDING STYLE:
- STREET
$382.95 -
DAYTONA TWIN TEC LLC Injector - M8 - 10.62 gm/sec 22106
DAYTONA TWIN TEC LLC
$461.95Precision fuel delivery is non-negotiable in high-performance racing. The DAYTONA TWIN TEC LLC M8 injector delivers 10.62 gm/sec of meticulously calibrated flow, ensuring your engine receives exactly the fuel mixture it demands under full boost and...10220223- SKU:
- 10220223
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- FLOW RATE METRIC:
- 10.62 G/S
- PRODUCT NAME:
- FUEL INJECTOR
- SPRAY ANGLE:
- 25°
- RIDING STYLE:
- STREET
- UNITS:
- SET
$461.95 -
DAYTONA TWIN TEC LLC Sensor WeGo Upgrade Kit 15304
DAYTONA TWIN TEC LLC
$693.95Serious tuning demands real-time data—not guesswork. The DAYTONA TWIN TEC LLC Sensor WeGo Upgrade Kit gives you dual-channel wide-band oxygen sensor monitoring paired with comprehensive ECM, BCM, and diagnostic control, letting you dial in air/fuel...10220224- SKU:
- 10220224
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- SENSOR
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLACK
$693.95 -
DAYTONA TWIN TEC LLC Wide Band Oxygen Sensor 115001
DAYTONA TWIN TEC LLC
$155.95Precise air-fuel ratio feedback is essential for optimizing engine performance, fuel economy, and emissions control across a wide range of tuning applications. The DAYTONA TWIN TEC LLC Wide Band Oxygen Sensor delivers real-time, accurate readings that...10220008- SKU:
- 10220008
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- OXYGEN SENSOR PLUG SIZE METRIC:
- 18.00 MM
- PRODUCT NAME:
- SENSOR
- RIDING STYLE:
- STREET
- MODEL:
- WEGO II
- TYPE:
- WIDE-BAND O2
- UNITS:
- EACH
$155.95 -
DAYTONA TWIN TEC LLC WEGO 3 System Sensor 112001
DAYTONA TWIN TEC LLC
$632.95Real-time air-fuel ratio monitoring is essential for tuning, diagnostics, and data logging—whether you're on the dyno or the track. The DAYTONA TWIN TEC WEGO 3 System delivers accurate AFR measurements with integrated data logging, allowing you to...10220054- SKU:
- 10220054
- Availability:
- Ships Same Business Day
- Weight:
- 1.28 LBS
- UNITS:
- KIT
- TYPE:
- WIDE-BAND O2
- MODEL:
- WEGO III
- OXYGEN SENSOR PLUG SIZE METRIC:
- 18.00 MM
- PRODUCT NAME:
- SENSOR KIT
- RIDING STYLE:
- STREET
$632.95 -
DAYTONA TWIN TEC LLC WEGO 3 Air Fuel Ratio Sensor 112005
DAYTONA TWIN TEC LLC
$1,027.95Tuning your engine without real-time AFR data is like flying blind. The DAYTONA TWIN TEC WEGO 3 gives you precise, accurate air-fuel ratio monitoring—both on the road and on the dyno—so you can dial in your fuel map with confidence and catch lean...10220110- SKU:
- 10220110
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- TYPE:
- WIDE-BAND O2
- MODEL:
- WEGO III
- OXYGEN SENSOR PLUG SIZE METRIC:
- 18.00 MM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SENSOR KIT INCLUDES 2 OXYGEN SENSORS
- UNITS:
- KIT
$1,027.95 -
DAYTONA TWIN TEC LLC Injector - M8 - 7.08 gm/sec 22071
DAYTONA TWIN TEC LLC
$331.95Precision fuel delivery is the foundation of reliable engine performance, and the DAYTONA TWIN TEC LLC M8 Injector delivers exactly that with meticulously matched flow rates and lab-tested consistency. Whether you're tuning a naturally aspirated build or...10220218- SKU:
- 10220218
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- FLOW RATE METRIC:
- 7.08 G/S
- PRODUCT NAME:
- FUEL INJECTOR
- SPRAY ANGLE:
- 25°
- RIDING STYLE:
- STREET
- UNITS:
- SET
$331.95 -
DAYTONA TWIN TEC LLC Injector - M8 - 6.24 gm/sec 22062
DAYTONA TWIN TEC LLC
$327.95Precision fuel delivery is the foundation of reliable, consistent engine performance—especially in high-demand racing applications where every millisecond of injection timing matters. The DAYTONA TWIN TEC LLC M8 injector delivers 6.24 gm/sec of...10220217- SKU:
- 10220217
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- FUEL INJECTOR
- SPRAY ANGLE:
- 25°
- FLOW RATE METRIC:
- 6.24 G/S
- RIDING STYLE:
- STREET
- UNITS:
- SET
$327.95 -
FEULING OIL PUMP CORP. Fuel Injector 9945
FEULING OIL PUMP CORP.
$99.95Fuel delivery precision directly impacts engine performance, throttle response, and fuel efficiency—making injector condition non-negotiable for any serious build. The Feuling Oil Pump Corp. Fuel Injector 9945 restores OEM-spec atomization and spray...10220228- SKU:
- 10220228
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- FLOW RATE IMPERIAL:
- 42.06 LB/H
- PRODUCT NAME:
- FUEL INJECTOR
- RIDING STYLE:
- STREET
$99.95 -
FEULING OIL PUMP CORP. EV-6 Series Fuel Injector - M8 - 6.1 9935
FEULING OIL PUMP CORP.
$169.95Feuling's EV-6 Series fuel injectors deliver precise fuel atomization critical for consistent combustion and peak power output on M8 platforms. Whether you're chasing horsepower gains or restoring OEM performance, this direct replacement ensures...10220230- SKU:
- 10220230
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- FUEL INJECTOR
- PRODUCT NAME:
- FUEL INJECTOR RACE ONLY
- FLOW RATE IMPERIAL:
- 48.41 LB/H
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$169.95 -
FEULING OIL PUMP CORP. EV-1 Series Fuel Injector - Yellow - 6.2 9939
FEULING OIL PUMP CORP.
$169.95Precise fuel delivery is non-negotiable for high-performance engines, and the Feuling OIL PUMP CORP. EV-1 Series Fuel Injector ensures consistent atomization and spray pattern across the entire RPM range. Whether you're running a naturally aspirated...10220231- SKU:
- 10220231
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- FUEL INJECTOR
- UNITS:
- EACH
- FLOW RATE IMPERIAL:
- 49.21 LB/H
- RIDING STYLE:
- STREET
$169.95
