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
-
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 arrives completely assembled with premium components,...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 a stock 88" motor or pushing displacement past 103",...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 -
EASTERN MOTORCYCLE PARTS Rocker Box Stud Set - Big Twin M-4-4538
EASTERN MOTORCYCLE PARTS
$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 clamping force, prevents head gasket failure, and...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
$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 and combustion efficiency, making them an essential...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, guides, and matched spring rates, this kit ensures optimal...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:
