Harley Engine Heads and Parts
Harley Bike Heads & Parts at JJ Motorsports
Unlock massive airflow and power with premium S&S cylinder heads and complete kits from JJ Motorsports, precision-machined for high-compression, big-bore builds on Twin Cam, Milwaukee-Eight, and Big Twin engines. These performance heads deliver dyno-proven gains with bolt-on convenience.
Shop S&S Cycle heads for championship-winning flow and reliability. Explore related categories such as Harley engine for valves and cams, or Harley for exhaust and pistons to complete your top-end build.
Top Harley Cylinder Heads & Kits
- S&S Cycle Cylinder Heads 106-4277 – Super Stock heads for M8; 2.120"/1.610" valves with high-flow ports for 114–131ci builds.
- S&S Cycle Cylinder Heads Twin Cam 106-3240 – Performance heads for 2006–2017 Twin Cam; massive flow for 124–131ci strokers.
- S&S Cycle Cylinder Head Kit Big Twin 90-1491 – Complete head kit with valves and springs; bolt-on power for Evo and Twin Cam 88–103 engines.
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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On Sale
S&S CYCLE Cylinder Head Kit - Big Twin 90-1498
S&S CYCLE
MSRP: $1,723.95Now: $1,551.56Was: $1,723.95S&S Cycle's cylinder head kit delivers the flow characteristics and durability demanded by serious Big Twin builders. Whether you're increasing displacement, optimizing combustion chamber design, or restoring a complete top end, these fully assembled...09300009- SKU:
- 09300009
- Availability:
- Ships Same Business Day
- Weight:
- 25.35 LBS
- COLOR/FINISH:
- ALUMINUM
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.500'
- FEATURES:
- SINGLE SPARK PLUG
- PRODUCT NAME:
- CYLINDER HEAD KIT
- STYLE:
- STOCK COMPRESSION
- UNITS:
- KIT
MSRP: $1,723.95Now: $1,551.56Was: $1,723.95 -
FEULING OIL PUMP CORP. Valve Spring Shims 1218
FEULING OIL PUMP CORP.
$18.95Valve spring shims are critical for dialing in your valvetrain geometry—mismatched spring heights directly compromise lift accuracy, stability, and engine reliability. Getting the open height spec right to peak camshaft lift prevents premature wear,...09300155- SKU:
- 09300155
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- STREET
- UNITS:
- 2 PACK
$18.95 -
FEULING OIL PUMP CORP. Valve Sprint Shims 1217
FEULING OIL PUMP CORP.
$14.95Proper valve spring seat height is critical to maintaining valvetrain stability and extracting maximum performance from your camshaft. If your springs aren't set to the correct open height, you risk valve float, reduced lift, and potential engine damage...09300237- SKU:
- 09300237
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
- PRODUCT NAME:
- SHIM
$14.95 -
EASTERN MOTORCYCLE PARTS Mount Studs A-16864-48
EASTERN MOTORCYCLE PARTS
$14.80Reliable mounting starts with quality hardware. These Eastern Motorcycle Parts mount studs provide the secure, vibration-resistant foundation your motorcycle needs for consistent performance and longevity. Whether you're assembling a custom build or...09300110- SKU:
- 09300110
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- STUD SET
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
- TYPE:
- TOP MOTOR MOUNT
$14.80 -
On Sale
S&S CYCLE Cylinder Heads 106-4277
S&S CYCLE
MSRP: $2,149.95Now: $1,934.96Was: $2,149.95S&S Cycle cylinder heads deliver measurable flow improvements that enhance performance immediately while laying the foundation for future engine modifications. Whether you're running a stock 88" big twin or pushing displacement north of 103", these fully...09300062- SKU:
- 09300062
- Availability:
- Ships Same Business Day
- Weight:
- 28.65 LBS
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- SILVER
- UNITS:
- PAIR
- DISPLACEMENT:
- 79 CC
MSRP: $2,149.95Now: $1,934.96Was: $2,149.95 -
On Sale
S&S CYCLE Cylinder Heads - Twin Cam 106-3227
S&S CYCLE
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95S&S Cycle cylinder heads deliver measurable high-port flow gains that unlock performance now while preserving headroom for future upgrades. Whether you're running a stock 88-cubic-inch or pushing a built 110-inch motor, these fully assembled heads match...09300063- SKU:
- 09300063
- Availability:
- Ships Same Business Day
- Weight:
- 28.50 LBS
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 79 CC
- COLOR/FINISH:
- SILVER
- UNITS:
- PAIR
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95 -
On Sale
S&S CYCLE Cylinder Heads - Twin Cam 106-3233
S&S CYCLE
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95If you're building a Twin Cam engine that demands reliable airflow and the flexibility to upgrade later, S&S Cycle cylinder heads deliver the port flow you need without forcing a complete rebuild down the road. These fully assembled heads accept OEM...09300064- SKU:
- 09300064
- Availability:
- Ships Same Business Day
- Weight:
- 28.65 LBS
- COLOR/FINISH:
- WRINKLE BLACK
- DISPLACEMENT:
- 79 CC
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- PRODUCT NAME:
- CYLINDER HEAD KIT
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95 -
On Sale
S&S CYCLE Cylinder Heads - Twin Cam 106-3240
S&S CYCLE
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95If you're building a Twin Cam engine that demands serious port flow without sacrificing reliability, S&S Cycle cylinder heads deliver the airflow foundation every upgrade depends on. These fully assembled heads are precision-engineered to handle...09300066- SKU:
- 09300066
- Availability:
- Ships Same Business Day
- Weight:
- 28.50 LBS
- COLOR/FINISH:
- WRINKLE BLACK
- DISPLACEMENT:
- 89 CC
- UNITS:
- PAIR
- PRODUCT NAME:
- CYLINDER HEAD KIT
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
- RIDING STYLE:
- STREET
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95 -
On Sale
S&S CYCLE Headbolt Kit 93-3070
S&S CYCLE
MSRP: $149.95Now: $134.96Was: $149.95Proper head bolt specifications are critical for cylinder head clamping force, sealing integrity, and long-term reliability on high-performance engines. The S&S CYCLE 93-3070 kit delivers the precision fitment and quality materials needed for S&S Twin...09300023- SKU:
- 09300023
- Availability:
- Ships Same Business Day
- Weight:
- 1.64 LBS
MSRP: $149.95Now: $134.96Was: $149.95Qty in Cart: 0Quantity:Price:MSRP: $149.95Now: $134.96Was: $149.95Subtotal: -
On Sale
S&S CYCLE Cylinder Heads - Twin Cam 90-1293
S&S CYCLE
MSRP: $1,815.95Now: $1,634.36Was: $1,815.95The S&S CYCLE Cylinder Heads (90-1293) deliver measurable port flow improvements that unlock performance gains now while preserving headroom for future upgrades—whether you're running stock displacement or pushing into big-inch territory. These fully...09300058- SKU:
- 09300058
- Availability:
- Ships Same Business Day
- Weight:
- 28.71 LBS
- COLOR/FINISH:
- WRINKLE BLACK
- DISPLACEMENT:
- 79 CC
- PRODUCT NAME:
- CYLINDER HEAD KIT
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
MSRP: $1,815.95Now: $1,634.36Was: $1,815.95 -
On Sale
S&S CYCLE Cylinder Head Kit - Big Twin 90-1004
S&S CYCLE
MSRP: $1,949.95Now: $1,754.96Was: $1,949.95Upgrading to S&S CYCLE cylinder heads transforms your Big Twin engine's breathing efficiency and power delivery, unlocking measurable gains across the RPM range. These fully assembled heads feature premium stainless steel valves and high-lift springs...09300007- SKU:
- 09300007
- Availability:
- Ships Same Business Day
- Weight:
- 24.56 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ALUMINUM
- UNITS:
- PAIR
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
MSRP: $1,949.95Now: $1,754.96Was: $1,949.95 -
On Sale
S&S CYCLE Cylinder Head Kit - Big Twin 90-1504
S&S CYCLE
MSRP: $1,799.95Now: $1,619.96Was: $1,799.95S&S Cycle cylinder heads are engineered to unlock significant performance gains on Big Twin Harley-Davidson engines through improved airflow, combustion efficiency, and valve lift capabilities. Whether you're building a street performance engine or...09300008- SKU:
- 09300008
- Availability:
- Ships Same Business Day
- Weight:
- 24.75 LBS
- MATERIAL:
- ALUMINUM
- MATERIAL:
- STAINLESS STEEL
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
MSRP: $1,799.95Now: $1,619.96Was: $1,799.95 -
On Sale
S&S CYCLE Cylinder Head Kit - Big Twin 90-1491
S&S CYCLE
MSRP: $1,895.95Now: $1,706.36Was: $1,895.95A high-performance cylinder head kit engineered to unlock genuine horsepower and torque gains on Big Twin engines without requiring a complete rebuild. S&S Cycle's fully assembled heads eliminate the guesswork and potential fitment issues of sourcing...09300013- SKU:
- 09300013
- Availability:
- Ships Same Business Day
- Weight:
- 24.85 LBS
- FEATURES:
- DUAL SPARK PLUG
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- UNITS:
- KIT
- COLOR/FINISH:
- ALUMINUM
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.625'
- STYLE:
- HIGH COMPRESSION
MSRP: $1,895.95Now: $1,706.36Was: $1,895.95 -
On Sale
S&S CYCLE Cylinder Head Kit - Big Twin 90-1496
S&S CYCLE
MSRP: $1,723.95Now: $1,551.56Was: $1,723.95A cylinder head is where combustion happens—and where performance is made or lost. The S&S Cycle Big Twin 90-1496 kit delivers a completely assembled, flow-optimized solution that eliminates the guesswork of sourcing individual components, getting you on...09300015- SKU:
- 09300015
- Availability:
- Ships Same Business Day
- Weight:
- 25.56 LBS
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- STYLE:
- STOCK COMPRESSION
- BORE SIZE IMPERIAL:
- 3.4375'
- COLOR/FINISH:
- ALUMINUM
- FEATURES:
- SINGLE SPARK PLUG
- UNITS:
- KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
MSRP: $1,723.95Now: $1,551.56Was: $1,723.95 -
On Sale
S&S CYCLE Performance Replacement Head 106-6059
S&S CYCLE
MSRP: $1,468.95Now: $1,322.06Was: $1,468.95If you're running a smaller displacement engine and looking to unlock real performance gains without sacrificing reliability, the S&S CYCLE Performance Replacement Head 106-6059 delivers measurable improvements in flow and compression. This fully...09300154- SKU:
- 09300154
- Availability:
- Ships Same Business Day
- Weight:
- 24.60 LBS
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- DISPLACEMENT:
- 76 CC
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- CYLINDER HEAD KIT
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
MSRP: $1,468.95Now: $1,322.06Was: $1,468.95Qty in Cart: 0Quantity:Price:MSRP: $1,468.95Now: $1,322.06Was: $1,468.95Subtotal: -
On Sale
S&S CYCLE Cylinder Head Kit 90-1499
S&S CYCLE
MSRP: $1,895.95Now: $1,706.36Was: $1,895.95A quality cylinder head is the foundation of engine performance—it controls airflow, combustion efficiency, and overall power delivery. The S&S Cycle 90-1499 arrives completely assembled and tested, eliminating the guesswork and machine shop costs...09300134- SKU:
- 09300134
- Availability:
- Ships Same Business Day
- Weight:
- 24.01 LBS
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- STYLE:
- STOCK COMPRESSION
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.625'
- MATERIAL:
- CAST
- COLOR/FINISH:
- ALUMINUM
- FEATURES:
- SINGLE SPARK PLUG
- MATERIAL:
- IRON
- UNITS:
- KIT
MSRP: $1,895.95Now: $1,706.36Was: $1,895.95 -
On Sale
S&S CYCLE Exhaust Stud Flange 50-0493
S&S CYCLE
MSRP: $8.95Now: $8.06Was: $8.95If you're rebuilding a classic or modern Harley engine, a quality exhaust stud flange is critical for a leak-free seal and reliable performance. The S&S Cycle 50-0493 delivers the precision fit and corrosion resistance your build demands, eliminating...09300136- SKU:
- 09300136
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
MSRP: $8.95Now: $8.06Was: $8.95 -
On Sale
S&S CYCLE Replacement Silicone Solenoid Caps 55-1009
S&S CYCLE
MSRP: $9.95Now: $8.96Was: $9.95S&S Cycle solenoid caps are subject to heat, vibration, and environmental stress during operation—and a compromised cap can lead to electrical failures or performance inconsistencies in your compression release system. This OEM replacement ensures...09300137- SKU:
- 09300137
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- WHITE
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- CAP
- TYPE:
- COMPRESSION RELEASE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $9.95Now: $8.96Was: $9.95Qty in Cart: 0Quantity:Price:MSRP: $9.95Now: $8.96Was: $9.95Subtotal: -
On Sale
S&S CYCLE Valve Spring Shim 90-2087
S&S CYCLE
MSRP: $7.95Now: $7.16Was: $7.95Valve spring shims are critical for maintaining proper valve train geometry and preload in high-performance engines. This S&S Cycle shim ensures accurate spring pressure across the RPM band, preventing valve float and extending component life. Whether...09300138- SKU:
- 09300138
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- BLACK
- TYPE:
- VALVE SPRING
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $7.95Now: $7.16Was: $7.95 -
On Sale
S&S CYCLE Cylinder Heads - Black 900-0251
S&S CYCLE
MSRP: $1,795.95Now: $1,616.36Was: $1,795.95The S&S CYCLE 900-0251 cylinder heads deliver the port flow efficiency needed to maximize performance gains both now and through future upgrades. Whether you're running a stock big-twin or planning forced induction modifications, these fully assembled...09300139- SKU:
- 09300139
- Availability:
- Ships Same Business Day
- Weight:
- 29.30 LBS
- COLOR/FINISH:
- BLACK
- DISPLACEMENT:
- 79 CC
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
- COLOR/FINISH:
- WRINKLE BLACK
- PRODUCT NAME:
- CYLINDER HEAD KIT
MSRP: $1,795.95Now: $1,616.36Was: $1,795.95
