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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STANDARD MOTOR PRODUCTS Air Module Idle MC-IAC3
STANDARD MOTOR PRODUCTS
$75.95A faulty idle air control module compromises engine stability, fuel economy, and cold-start performance—issues that cascade into rough idling and poor driveability. The Standard Motor Products MC-IAC3 restores precise idle regulation by managing airflow...10220085- SKU:
- 10220085
- Availability:
- Ships Same Business Day
- Weight:
- 0.33 LBS
- PRODUCT NAME:
- CONTROL MODULE
- TYPE:
- IDLE AIR
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$75.95 -
STANDARD MOTOR PRODUCTS Throttle Position Sensor MC-TPS2
STANDARD MOTOR PRODUCTS
$43.95A faulty throttle position sensor compromises engine response, fuel economy, and drivability—often triggering check engine lights and unpredictable idle behavior. The STANDARD MOTOR PRODUCTS MC-TPS2 is a direct OEM replacement that restores precise...10220073- SKU:
- 10220073
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- THROTTLE POSITION
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SENSOR
- UNITS:
- EACH
$43.95Qty in Cart: 0Quantity:Price:$43.95Subtotal: -
STANDARD MOTOR PRODUCTS Air Module Idle MC-IAC2
STANDARD MOTOR PRODUCTS
$64.95A faulty idle air control module compromises engine stability, fuel efficiency, and cold-start performance. The Standard Motor Products MC-IAC2 restores precise idle regulation, ensuring smooth operation across all driving conditions. As an...10220074- SKU:
- 10220074
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- CONTROL MODULE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- IDLE AIR
$64.95 -
STANDARD MOTOR PRODUCTS Throttle Position Sensor MC-TPS1
STANDARD MOTOR PRODUCTS
$66.95A faulty throttle position sensor degrades engine responsiveness, fuel economy, and drivability—often causing rough idle, hesitation during acceleration, or check engine lights. The STANDARD MOTOR PRODUCTS MC-TPS1 is a direct OEM replacement that...10220076- SKU:
- 10220076
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- SENSOR
- RIDING STYLE:
- STREET
- TYPE:
- THROTTLE POSITION
- UNITS:
- EACH
$66.95Qty in Cart: 0Quantity:Price:$66.95Subtotal: -
STANDARD MOTOR PRODUCTS Map Sensor - Original Equipment Manufacturer 32316-99 MC-MAP3
STANDARD MOTOR PRODUCTS
$78.95A faulty MAP sensor disrupts fuel delivery calibration and engine timing, causing poor idle quality, reduced fuel economy, and potential check-engine codes. This OEM replacement restores your engine management system to factory specifications, ensuring...10220075- SKU:
- 10220075
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- TYPE:
- MAP
- PRODUCT NAME:
- SENSOR
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$78.95 -
HORSEPOWER, INC Throttle Body - Black - 51mm /1.71 HPI-51D1-17B
HORSEPOWER, INC
$784.95A restrictive throttle body is often the first bottleneck limiting your engine's breathing potential. The HORSEPOWER, INC 51mm throttle body eliminates that restriction with flow bench-tested porting and precision CNC machining, delivering measurable...10220236- SKU:
- 10220236
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- MATERIAL:
- ALUMINUM
- MODEL:
- CABLE DRIVEN™
- TYPE:
- SINGLE BORE
- BORE SIZE METRIC:
- 51.00 MM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- THROTTLE BODY
- INTAKE RUNNER LENGTH IMPERIAL:
- 1.71'
$784.95 -
HORSEPOWER, INC Throttle Body - Black - 55mm/1.80 HPI-55D1-18B
HORSEPOWER, INC
$784.95A restrictive stock throttle body robs your engine of potential airflow, limiting horsepower and throttle response. The HORSEPOWER, INC 55mm throttle body unleashes that trapped performance through CNC-ported internals and flow-bench validation,...10220237- SKU:
- 10220237
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- BORE SIZE METRIC:
- 55.00 MM
- MODEL:
- CABLE DRIVEN™
- TYPE:
- SINGLE BORE
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- INTAKE RUNNER LENGTH IMPERIAL:
- 1.80'
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- THROTTLE BODY
- RIDING STYLE:
- STREET
$784.95 -
HORSEPOWER, INC Throttle Body - Black - 51mm/1.71 HPI-51D6-17B
HORSEPOWER, INC
$784.95A larger throttle body is one of the most effective bolt-on upgrades for unlocking your engine's full potential—more air means more combustion, more power. This 51mm unit combines CNC-ported internals with flow-bench validation to deliver measurable...10220238- SKU:
- 10220238
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- MATERIAL:
- ALUMINUM
- MODEL:
- CABLE DRIVEN™
- RIDING STYLE:
- STREET
- TYPE:
- SINGLE BORE
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- BORE SIZE METRIC:
- 51.00 MM
- INTAKE RUNNER LENGTH IMPERIAL:
- 1.71'
- PRODUCT NAME:
- THROTTLE BODY
$784.95 -
HORSEPOWER, INC Throttle Body - Black - 55mm/1.80 HPI-55D6-18B
HORSEPOWER, INC
$784.95A larger throttle body is one of the most direct paths to freeing up horsepower and torque in your engine—it simply allows more air to reach your combustion chambers with less restriction. This HORSEPOWER, INC unit combines CNC-ported internals with...10220239- SKU:
- 10220239
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- BORE SIZE METRIC:
- 55.00 MM
- MATERIAL:
- ALUMINUM
- MODEL:
- CABLE DRIVEN™
- RIDING STYLE:
- STREET
- TYPE:
- SINGLE BORE
- PRODUCT NAME:
- THROTTLE BODY
- COLOR/FINISH:
- BLACK
- INTAKE RUNNER LENGTH IMPERIAL:
- 1.80'
- UNITS:
- EACH
$784.95Qty in Cart: 0Quantity:Price:$784.95Subtotal: -
HORSEPOWER, INC Throttle Body - Black - 55/1.80 HPI-55MF1-18B
HORSEPOWER, INC
$884.95If you're running a big-displacement engine that demands serious airflow, your OEM throttle body is already a bottleneck. The HORSEPOWER, INC 55mm throttle body replaces restrictive factory components with a fully ported, large-plenum design that unlocks...10220240- SKU:
- 10220240
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- MODEL:
- MAX FLOW I™
- PRODUCT NAME:
- THROTTLE BODY
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLACK
- INTAKE RUNNER LENGTH IMPERIAL:
- 1.80'
- UNITS:
- EACH
- BORE SIZE METRIC:
- 55.00 MM
- TYPE:
- SINGLE BORE
$884.95 -
HORSEPOWER, INC Throttle Body - Black - 55/1.80 HPI-55MF6-18B
HORSEPOWER, INC
$884.95If you're running a large-displacement engine, your OEM throttle body is likely your biggest air-restriction bottleneck. This 55mm HORSEPOWER, INC unit completely replaces that constraint with a fully ported, internally machined design that delivers the...10220241- SKU:
- 10220241
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- COLOR/FINISH:
- BLACK
- BASE COLOR:
- BLACK
- BORE SIZE METRIC:
- 55.00 MM
- TYPE:
- SINGLE BORE
- UNITS:
- EACH
- INTAKE RUNNER LENGTH IMPERIAL:
- 1.80'
- MATERIAL:
- ALUMINUM
- MODEL:
- MAX FLOW I™
- PRODUCT NAME:
- THROTTLE BODY
- RIDING STYLE:
- STREET
$884.95 -
HORSEPOWER, INC Throttle Body - Black - 51mm/1.66 HPI-51D1-16B
HORSEPOWER, INC
$784.95A restrictive OEM throttle body is costing you measurable horsepower and throttle response. The HORSEPOWER, INC 51mm Throttle Body unlocks your engine's full potential with flow bench-validated porting and a precision brass blade that eliminates...10220242- SKU:
- 10220242
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- MODEL:
- CABLE DRIVEN™
- BORE SIZE METRIC:
- 51.00 MM
- PRODUCT NAME:
- THROTTLE BODY
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- INTAKE RUNNER LENGTH IMPERIAL:
- 1.66'
- TYPE:
- SINGLE BORE
$784.95 -
THUNDERMAX Oxygen Sensor 309-355
THUNDERMAX
$129.95The THUNDERMAX Oxygen Sensor 309-355 pairs with an ECM tuning platform to optimize your fuel mixture and ignition timing without the expense and time commitment of traditional dyno tuning. By replacing your factory oxygen sensors with this system, you...10220039- SKU:
- 10220039
- Availability:
- Ships Same Business Day
- Weight:
- 0.47 LBS
- RIDING STYLE:
- STREET
- TYPE:
- WIDE-BAND O2
- OXYGEN SENSOR PLUG SIZE IMPERIAL:
- 0.71'
- PRODUCT NAME:
- SENSOR
- UNITS:
- EACH
$129.95 -
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
$884.95 -
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
$285.95Qty in Cart: 0Quantity:Price:$285.95Subtotal: -
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 -
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 -
FEULING OIL PUMP CORP. Fuel Injector 9941
FEULING OIL PUMP CORP.
$99.95Fuel injector performance directly impacts engine efficiency, throttle response, and overall drivability—making a quality replacement critical for maintaining peak combustion characteristics. The FEULING OIL PUMP CORP. Fuel Injector 9941 delivers precise...10220113- SKU:
- 10220113
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- FLOW RATE IMPERIAL:
- 34.13 LB/H
- UNITS:
- EACH
- PRODUCT NAME:
- FUEL INJECTOR
$99.95Qty in Cart: 0Quantity:Price:$99.95Subtotal:
