Harley Engine
Harley Bike Engine Parts at JJ Motorsports
Rebuild and boost your Harley's engine with premium parts from JJ Motorsports. Our inventory features complete gasket sets, piston kits, oil filters, pushrod tubes, and coolers designed for maximum strength, leak-free sealing, and high-performance in extreme conditions. Compatible with Big Twins, Softail, Touring, and more, these components support top-end overhauls, oil management, and durability for street rides or custom builds.
Shop trusted brands like Drag Specialties for magnetic filters and Wiseco for forged pistons. Explore related categories such as Harley air and fuel for carb tuning or Harley drivetrain for transmission upgrades.
Top Harley Engine Products
- DRAG SPECIALTIES Magnetic Ring Oil Filter - Chrome - 3-1/4" 140003HP-BX18 – Captures metal particles with pressure relief.
- WISECO Piston Kit .010 .883 XL K1656 – Forged aluminum with rings, pins, and circlips for rebuilds.
- DRAG SPECIALTIES Pushrod Tube Kit Big Twin 75711 – Includes tubes, clips, cups, and springs for complete engine.
- ULTRACOOL Below Regulator Mount Oil Cooler Stainless Steel RF-2CSS – Fits S&S 111/124/143 engines with machined adapter.
- PAUGHCO Ribbed Teardrop Air Cleaner 701-200 – Chrome-plated aluminum with mini filter.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
On Sale
ARLEN NESS Points Cover - Black 700-026
ARLEN NESS
MSRP: $59.95Now: $53.96Was: $59.95The ARLEN NESS Points Cover delivers a clean, finished look to your engine while protecting critical ignition components from dirt, moisture, and damage. This black cover is a straightforward bolt-on upgrade that transforms the appearance of your engine...09401951- SKU:
- 09401951
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- COLOR/FINISH:
- BLACK
- STYLE:
- 10 GAUGE
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- 6061 T-6 ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- MACHINED
- TYPE:
- POINTS
- UNITS:
- EACH
MSRP: $59.95Now: $53.96Was: $59.95 -
On Sale
ARLEN NESS Points Cover - Chrome 700-025
ARLEN NESS
MSRP: $59.95Now: $53.96Was: $59.95A points cover serves as both a functional protection component and a visual anchor for your engine's aesthetic. The Arlen Ness Points Cover delivers OEM-quality durability with chrome finishing that complements modern and classic custom builds alike...09401952- SKU:
- 09401952
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- STYLE:
- 10 GAUGE
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- 6061 T-6 ALUMINUM
- COLOR/FINISH:
- MACHINED
- TYPE:
- POINTS
MSRP: $59.95Now: $53.96Was: $59.95Qty in Cart: 0Quantity:Price:MSRP: $59.95Now: $53.96Was: $59.95Subtotal: -
On Sale
ARLEN NESS Pushrod Tubes - Black 03-634
ARLEN NESS
MSRP: $229.95Now: $206.96Was: $229.95Proper pushrod geometry is fundamental to valvetrain reliability and performance consistency across engine RPM ranges. These ARLEN NESS lower tubes deliver the adjustability you need to dial in exact valve timing while maintaining the structural...09280111- SKU:
- 09280111
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- BASE COLOR:
- BLACK
- BASE FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- MODEL:
- 10 GAUGE
- PRODUCT NAME:
- TUBE KIT
- RIDING STYLE:
- STREET
- TYPE:
- PUSHROD
- UNITS:
- SET OF 4
MSRP: $229.95Now: $206.96Was: $229.95Qty in Cart: 0Quantity:Price:MSRP: $229.95Now: $206.96Was: $229.95Subtotal: -
On Sale
ARLEN NESS Rocker Cover Box - 10 Gauge - Black 18-253
ARLEN NESS
MSRP: $549.95Now: $494.96Was: $549.95If you're looking to upgrade your engine's appearance without compromising quality or fitment, the ARLEN NESS Rocker Cover Box delivers precision machining with unmistakable style. Built from 6061 T-6 forged billet aluminum, this cover provides...09401342- SKU:
- 09401342
- Availability:
- Ships Same Business Day
- Weight:
- 3.95 LBS
- COLOR/FINISH:
- MACHINED
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- BILLET ALUMINUM
- TYPE:
- ROCKER BOX
- COLOR/FINISH:
- BLACK
- MODEL:
- 10 GAUGE
- UNITS:
- PAIR
MSRP: $549.95Now: $494.96Was: $549.95Qty in Cart: 0Quantity:Price:MSRP: $549.95Now: $494.96Was: $549.95Subtotal: -
On Sale
ARLEN NESS Cam Cover - 10 Gauge - Chrome 03-962
ARLEN NESS
MSRP: $299.95Now: $269.96Was: $299.95OEM cam covers are prone to cracking and warping under high heat and vibration—a weak point that compromises engine aesthetics and reliability. The ARLEN NESS 10 Gauge Cam Cover delivers a precision-machined upgrade that handles extreme conditions while...09401343- SKU:
- 09401343
- Availability:
- Ships Same Business Day
- Weight:
- 3.70 LBS
- MODEL:
- 10 GAUGE
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- TYPE:
- CAM
- UNITS:
- EACH
- MATERIAL:
- 6061 T-6 ALUMINUM
- RIDING STYLE:
- STREET
MSRP: $299.95Now: $269.96Was: $299.95 -
On Sale
ARLEN NESS Cam Cover - 10 Gauge - Black 03-963
ARLEN NESS
MSRP: $299.95Now: $269.96Was: $299.95The stock cam cover on your bike is a die-cast component prone to cracking and leaking—especially under high heat and vibration. This ARLEN NESS replacement upgrades you to a precision-machined 6061 T-6 forged aluminum cover that delivers superior...09401344- SKU:
- 09401344
- Availability:
- Ships Same Business Day
- Weight:
- 3.40 LBS
- MODEL:
- 10 GAUGE
- MATERIAL:
- 6061 T-6 ALUMINUM
- COLOR/FINISH:
- BLACK ANODIZED
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- MACHINED
- TYPE:
- CAM
MSRP: $299.95Now: $269.96Was: $299.95 -
On Sale
ARLEN NESS Lifter Block - Cover - 10 Gauge - Chrome 12-572
ARLEN NESS
MSRP: $199.95Now: $179.96Was: $199.95A quality lifter block cover protects critical engine components from debris, moisture, and contamination while maintaining a clean, professional appearance on your build. This ARLEN NESS cover combines precision engineering with durability, ensuring...09401345- SKU:
- 09401345
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- TYPE:
- LIFTER BLOCK
- UNITS:
- PAIR
- MODEL:
- 10 GAUGE
- MATERIAL:
- 6061-T6 BILLET ALUMINUM
- RIDING STYLE:
- STREET
MSRP: $199.95Now: $179.96Was: $199.95Qty in Cart: 0Quantity:Price:MSRP: $199.95Now: $179.96Was: $199.95Subtotal: -
On Sale
ARLEN NESS Cam Cover - 10 Gauge - Black - M8 03-983
ARLEN NESS
MSRP: $329.95Now: $296.96Was: $329.95The OEM cam cover on your M8 is a die-cast component that can crack under thermal stress and vibration—compromising engine aesthetics and potentially causing oil seepage. The ARLEN NESS 10 Gauge Cam Cover replaces it with a CNC-machined 6061 T-6 forged...09401659- SKU:
- 09401659
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
- MATERIAL:
- 6061 T-6 ALUMINUM
- COLOR/FINISH:
- BLACK ANODIZED
- COLOR/FINISH:
- MACHINED
- MODEL:
- 10 GAUGE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- COVER
- TYPE:
- CAM
- UNITS:
- EACH
MSRP: $329.95Now: $296.96Was: $329.95Qty in Cart: 0Quantity:Price:MSRP: $329.95Now: $296.96Was: $329.95Subtotal: -
On Sale
ARLEN NESS Rocker Cover Box - 10 Gauge - Chrome 18-262
ARLEN NESS
MSRP: $699.95Now: $629.96Was: $699.95If you're looking to elevate your engine's visual presence while maintaining OEM reliability, the ARLEN NESS Rocker Cover Box delivers a dramatic aesthetic upgrade without compromising fit or function. Machined from premium 6061 T-6 forged billet...09401662- SKU:
- 09401662
- Availability:
- Ships Same Business Day
- Weight:
- 5.95 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- UNITS:
- PAIR
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- MODEL:
- 10 GAUGE
- COLOR/FINISH:
- CHROME
MSRP: $699.95Now: $629.96Was: $699.95 -
On Sale
ARLEN NESS Rocker Cover Box - 10 Gauge - Black 18-263
ARLEN NESS
MSRP: $699.95Now: $629.96Was: $699.95If you're looking to elevate your engine's visual presence while maintaining OEM-level reliability, the ARLEN NESS Rocker Cover Box delivers both style and substance. This 10-gauge billet aluminum cover replaces your stock rocker boxes with...09401663- SKU:
- 09401663
- Availability:
- Ships Same Business Day
- Weight:
- 5.66 LBS
- COLOR/FINISH:
- MACHINED
- PRODUCT NAME:
- COVER
- TYPE:
- ROCKER BOX
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- MODEL:
- 10 GAUGE
MSRP: $699.95Now: $629.96Was: $699.95Qty in Cart: 0Quantity:Price:MSRP: $699.95Now: $629.96Was: $699.95Subtotal: -
On Sale
ARLEN NESS Cam Cover - Black 03-975
ARLEN NESS
MSRP: $299.95Now: $269.96Was: $299.95The OEM die-cast cam cover on your Harley is functional but susceptible to cracking and corrosion over time. This ARLEN NESS replacement upgrades you to 6061 T-6 forged aluminum—a material that resists thermal stress, delivers a cleaner appearance, and...09401901- SKU:
- 09401901
- Availability:
- Ships Same Business Day
- Weight:
- 3.01 LBS
- COLOR/FINISH:
- BLACK ANODIZED
- MODEL:
- 10 GAUGE
- MATERIAL:
- 6061 T-6 ALUMINUM
- PRODUCT NAME:
- COVER
- TYPE:
- CAM
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $299.95Now: $269.96Was: $299.95 -
On Sale
ARLEN NESS Cam Cover - Black 03-985
ARLEN NESS
MSRP: $329.95Now: $296.96Was: $329.95The OEM die-cast cam cover is prone to cracking and corrosion, compromising both aesthetics and engine protection. ARLEN NESS solves this with a billet-grade aluminum replacement that delivers superior durability while maintaining a clean, purposeful...09401903- SKU:
- 09401903
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
- COLOR/FINISH:
- BLACK ANODIZED
- PRODUCT NAME:
- COVER
- MODEL:
- 10 GAUGE
- TYPE:
- CAM
- UNITS:
- EACH
- MATERIAL:
- 6061 T-6 ALUMINUM
- RIDING STYLE:
- STREET
MSRP: $329.95Now: $296.96Was: $329.95 -
On Sale
ARLEN NESS Cam Cover - Titanium 03-986
ARLEN NESS
MSRP: $329.95Now: $296.96Was: $329.95The ARLEN NESS Cam Cover 03-986 delivers a meaningful upgrade over stock die-cast components by replacing flex and wear with precision-machined rigidity. Constructed from 6061 T-6 forged aluminum, this cover resists thermal stress and vibration far...09401904- SKU:
- 09401904
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
- TYPE:
- CAM
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- TITANIUM
- MATERIAL:
- 6061 T-6 ALUMINUM
- MODEL:
- 10 GAUGE
MSRP: $329.95Now: $296.96Was: $329.95 -
On Sale
ARLEN NESS Lifter Block - Black 12-574
ARLEN NESS
MSRP: $209.95Now: $188.96Was: $209.95The ARLEN NESS Lifter Block is engineered for builders who demand precision fitment and durability in their engine assembly. This CNC-machined component provides the exact lift and clearance needed for reliable valve train operation, eliminating...09401905- SKU:
- 09401905
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- PRODUCT NAME:
- COVER
- COLOR/FINISH:
- BLACK ANODIZED
- MODEL:
- 10 GAUGE
- RIDING STYLE:
- STREET
- TYPE:
- LIFTER BLOCK
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 6061-T6 BILLET ALUMINUM
- UNITS:
- PAIR
MSRP: $209.95Now: $188.96Was: $209.95Qty in Cart: 0Quantity:Price:MSRP: $209.95Now: $188.96Was: $209.95Subtotal: -
On Sale
ARLEN NESS Lifter Block - Titanium 12-575
ARLEN NESS
MSRP: $209.95Now: $188.96Was: $209.95The ARLEN NESS Lifter Block 12-575 provides the precision spacing and alignment your engine build demands, ensuring accurate valve train geometry and eliminating costly guesswork during assembly. CNC-machined from billet aluminum, this component delivers...09401906- SKU:
- 09401906
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- MATERIAL:
- 6061-T6 BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- TITANIUM
- MODEL:
- 10 GAUGE
- TYPE:
- LIFTER BLOCK
MSRP: $209.95Now: $188.96Was: $209.95 -
On Sale
ARLEN NESS Lifter Block - Titanium 12-585
ARLEN NESS
MSRP: $249.95Now: $224.96Was: $249.95The ARLEN NESS Lifter Block is an essential upgrade for builders seeking precision and reliability in high-performance engine assembly. This CNC-machined component ensures proper valve train geometry and clearance, critical for maintaining consistent...09401908- SKU:
- 09401908
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- MATERIAL:
- 6061-T6 BILLET ALUMINUM
- RIDING STYLE:
- STREET
- MODEL:
- 10 GAUGE
- COLOR/FINISH:
- TITANIUM
- UNITS:
- PAIR
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- COVER
- TYPE:
- LIFTER BLOCK
MSRP: $249.95Now: $224.96Was: $249.95Qty in Cart: 0Quantity:Price:MSRP: $249.95Now: $224.96Was: $249.95Subtotal: -
On Sale
ARLEN NESS Rocker Cover - Black 18-256
ARLEN NESS
MSRP: $549.95Now: $494.96Was: $549.95If you're looking to elevate your engine's visual presence without compromising function, the ARLEN NESS Rocker Cover delivers a precision-engineered alternative to stock top covers. This billet aluminum piece transforms the upper engine aesthetic while...09401909- SKU:
- 09401909
- Availability:
- Ships Same Business Day
- Weight:
- 3.71 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- COLOR/FINISH:
- BLACK
- UNITS:
- PAIR
- MODEL:
- 10 GAUGE
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
MSRP: $549.95Now: $494.96Was: $549.95 -
On Sale
ARLEN NESS Rocker Cover - Titanium 18-257
ARLEN NESS
MSRP: $549.95Now: $494.96Was: $549.95If you're looking to elevate your engine's visual presence while maintaining OEM reliability, the ARLEN NESS Rocker Cover delivers the custom aesthetic your build deserves. This CNC-machined billet piece replaces your factory top rocker box cover with a...09401910- SKU:
- 09401910
- Availability:
- Ships Same Business Day
- Weight:
- 3.66 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- COLOR/FINISH:
- TITANIUM
- PRODUCT NAME:
- COVER
- UNITS:
- PAIR
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- BILLET ALUMINUM
- MODEL:
- 10 GAUGE
MSRP: $549.95Now: $494.96Was: $549.95 -
On Sale
ARLEN NESS Rocker Cover - Black 18-266
ARLEN NESS
MSRP: $699.95Now: $629.96Was: $699.95Carved from 6061 T-6 forged billet aluminum, Drastically changes the look of your engine, Replaces OEM top rocker box covers, Includes necessary gaskets and hardware09401911- SKU:
- 09401911
- Availability:
- Ships Same Business Day
- Weight:
- 5.71 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- MODEL:
- 10 GAUGE
- COLOR/FINISH:
- BLACK
- UNITS:
- PAIR
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
MSRP: $699.95Now: $629.96Was: $699.95Qty in Cart: 0Quantity:Price:MSRP: $699.95Now: $629.96Was: $699.95Subtotal: -
On Sale
ARLEN NESS Point Cover - Black 700-008
ARLEN NESS
MSRP: $59.95Now: $53.96Was: $59.95A quality point cover does more than protect your ignition components—it completes your engine's aesthetic while safeguarding critical internals from contamination and debris. The ARLEN NESS Point Cover delivers a clean, finished look that matches...09401913- SKU:
- 09401913
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- COLOR/FINISH:
- MACHINED
- TYPE:
- POINTS
- MATERIAL:
- 6061 T-6 ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- STYLE:
- 10 GAUGE
MSRP: $59.95Now: $53.96Was: $59.95
