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 90-1498
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...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. Cylinder Head Breathers - M8 3250
FEULING OIL PUMP CORP.
$399.95Stock cylinder head breathers limit your engine's breathing efficiency and can trap moisture that compromises oil quality. Feuling's billet breather design optimizes crankcase ventilation while...09300239- SKU:
- 09300239
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
$399.95 -
FEULING OIL PUMP CORP. Rocker Shaft Shims - 0.003"/0.005"/0.010" - M8 1230
FEULING OIL PUMP CORP.
$79.95Excessive rocker arm end play causes noise, oil starvation, and accelerated wear on your cylinder head—issues that compound quickly on high-performance engines. These hardened steel shims restore...09300240- SKU:
- 09300240
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
$79.95 -
S&S CYCLE Billet Head Breather Kit - Anodized Blue - M8 900-1186
S&S CYCLE
$299.95If you're running an M8 Harley and tired of excessive oil blow-by fouling your intake and burning off in the combustion chamber, upgrading to a quality billet breather kit isn't optional—it's...09300243- SKU:
- 09300243
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$299.95 -
FEULING OIL PUMP CORP. Rocker Shaft Shims - 0.003" - M8 1227
FEULING OIL PUMP CORP.
$119.95Excessive rocker arm end play doesn't just create noise—it degrades oil pressure distribution and accelerates wear on your cylinder head's thrust surfaces. Feuling's hardened rocker shaft shims...09300246- SKU:
- 09300246
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$119.95Qty in Cart: 0Quantity:Price:$119.95Subtotal: -
FEULING OIL PUMP CORP. Rocker Shaft Shims - 0.010" - M8 1229
FEULING OIL PUMP CORP.
$99.95Excessive rocker arm end play doesn't just create noise—it degrades oil pressure consistency and accelerates wear on your cylinder head's thrust surfaces. The Feuling 0.010" M8 Rocker Shaft Shim...09300248- SKU:
- 09300248
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$99.95 -
FEULING OIL PUMP CORP. Rocker Shaft Shims - 0.005" - M8 1228
FEULING OIL PUMP CORP.
$99.95Excessive rocker arm end play causes valve train noise, oil starvation, and accelerated wear on your cylinder head—especially on M8 heads prone to standoff damage. These hardened shims restore...09300247- SKU:
- 09300247
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$99.95Qty in Cart: 0Quantity:Price:$99.95Subtotal: -
KIBBLEWHITE Exhaust Spigot - Big Twin 20-2104
KIBBLEWHITE
$11.35If your classic Panhead's exhaust attachment point has cracked, corroded, or simply worn out, you need a reliable replacement—not a band-aid fix. The KIBBLEWHITE Exhaust Spigot rebuilds this critical...09300059- SKU:
- 09300059
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- COLOR/FINISH:
- ALUMINUM
- MATERIAL:
- 6061 T6 ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- EXHAUST SPIGOT
- UNITS:
- EACH
$11.35 -
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...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...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...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...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...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...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...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...09300023- SKU:
- 09300023
- Availability:
- Ships Same Business Day
- Weight:
- 1.64 LBS
MSRP: $149.95Now: $134.96Was: $149.95 -
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...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...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...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...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: $1,895.95Qty in Cart: 0Quantity:Price:MSRP: $1,895.95Now: $1,706.36Was: $1,895.95Subtotal:
