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!
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- Quantity
- Price
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On Sale
S&S CYCLE Cylinder Head Kit - Big Twin 90-1497
S&S CYCLE
MSRP: $1,895.95Now: $1,706.36Was: $1,895.95A quality cylinder head kit is fundamental to unlocking your Big Twin's full potential—whether you're building a stroker, upgrading an aging engine, or restoring a classic. The S&S Cycle 90-1497...09300017- SKU:
- 09300017
- Availability:
- Ships Same Business Day
- Weight:
- 25.55 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- FEATURES:
- SINGLE SPARK PLUG
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- STYLE:
- STOCK COMPRESSION
- UNITS:
- KIT
- COLOR/FINISH:
- ALUMINUM
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
MSRP: $1,895.95Now: $1,706.36Was: $1,895.95 -
On Sale
S&S CYCLE Cylinder Heads - Twin Cam 90-1106
S&S CYCLE
MSRP: $1,795.95Now: $1,616.36Was: $1,795.95S&S Cycle cylinder heads deliver measurable gains in port flow and breathing efficiency, giving you performance improvements now while preserving headroom for future upgrades. Whether you're running...09300006- SKU:
- 09300006
- Availability:
- Ships Same Business Day
- Weight:
- 29.01 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 89 CC
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- COLOR/FINISH:
- WRINKLE BLACK
- UNITS:
- PAIR
MSRP: $1,795.95Now: $1,616.36Was: $1,795.95 -
On Sale
EASTERN MOTORCYCLE PARTS Rocker Box Stud Set - Big Twin M-4-4538
EASTERN MOTORCYCLE PARTS
MSRP: $47.95Now: $43.63Was: $47.95Rocker box studs are critical fasteners that secure your cylinder head assembly and bear significant stress from combustion pressures and engine vibration. Using OEM-equivalent studs ensures proper...09300027- SKU:
- 09300027
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- TYPE:
- ROCKER BOX
- PRODUCT NAME:
- STUD SET
- UNITS:
- 8 PACK
- RIDING STYLE:
- STREET
MSRP: $47.95Now: $43.63Was: $47.95 -
On Sale
S&S CYCLE Cylinder Heads - Twin Cam 106-3255
S&S CYCLE
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95S&S Cycle cylinder heads unlock significant performance gains on Twin Cam engines while preserving upgrade flexibility for future modifications. These fully assembled heads deliver improved port flow...09300065- SKU:
- 09300065
- Availability:
- Ships Same Business Day
- Weight:
- 28.65 LBS
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- SUPER STOCK
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- DISPLACEMENT:
- 89 CC
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- CYLINDER HEAD KIT
MSRP: $1,995.95Now: $1,796.36Was: $1,995.95Qty in Cart: 0Quantity:Price:MSRP: $1,995.95Now: $1,796.36Was: $1,995.95Subtotal: -
On Sale
S&S CYCLE Cylinder Head Kit 90-1488
S&S CYCLE
MSRP: $1,886.95Now: $1,698.26Was: $1,886.95The S&S CYCLE Cylinder Head Kit 90-1488 delivers a complete, ready-to-install solution that eliminates the guesswork of sourcing individual components. Pre-assembled with precision valve seats,...09300133- SKU:
- 09300133
- Availability:
- Ships Same Business Day
- Weight:
- 24.24 LBS
- FEATURES:
- DUAL SPARK PLUG
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- STYLE:
- STOCK COMPRESSION
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ALUMINUM
- MATERIAL:
- IRON
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.625'
- MATERIAL:
- CAST
MSRP: $1,886.95Now: $1,698.26Was: $1,886.95Qty in Cart: 0Quantity:Price:MSRP: $1,886.95Now: $1,698.26Was: $1,886.95Subtotal:
