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 Performance Replacement Head 106-6064
S&S CYCLE
MSRP: $1,553.95Now: $1,398.56Was: $1,553.95S&S heads are available to be used with stock-style flat-top pistons, Kits are fully assembled, and include stainless steel valves and high-lift (.585") springs, Intake manifold and gasket kits are sold separately; gasket kits contain head gaskets, base...09300141- SKU:
- 09300141
- Availability:
- Ships Same Business Day
- Weight:
- 25.21 LBS
- DISPLACEMENT:
- 76 CC
- UNITS:
- PAIR
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CYLINDER HEAD KIT
MSRP: $1,553.95Now: $1,398.56Was: $1,553.95 -
S&S CYCLE Valve Guide - +.001" 90-2211
S&S CYCLE
$73.76Cast iron intake/exhaust guide, Fits S&S Super Stock and stock Harley-Davidson cylinder heads, Guide ID measures aprox. .309"/.310" with enough material left for proper clearancing, Made in the U.S.A.09262894- SKU:
- 09262894
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
- OVERBORE IMPERIAL:
- OVERSIZE (+0.001')
$73.76 -
S&S CYCLE Valve Guide - +.002" 90-2212
S&S CYCLE
$113.36Cast iron intake/exhaust guide, Fits S&S Super Stock and stock Harley-Davidson cylinder heads, Guide ID measures aprox. .309"/.310" with enough material left for proper clearancing, Made in the U.S.A.09262921- SKU:
- 09262921
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- OVERBORE IMPERIAL:
- OVERSIZE (+0.002')
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$113.36 -
On Sale
S&S CYCLE Compression Release Kit 90-4915
S&S CYCLE
MSRP: $448.95Now: $404.06Was: $448.95Electric compression releases open when you press the start button and close when the button is released, Manual compression releases are opened manually and close when the motor starts, Kits include the required parts for installation, For ease of...20099080- SKU:
- 20099080
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- PRODUCT NAME:
- COMPRESSION RELEASE KIT
- RIDING STYLE:
- STREET
- TYPE:
- ELECTRIC
- UNITS:
- KIT
MSRP: $448.95Now: $404.06Was: $448.95 -
On Sale
S&S CYCLE Compression Release Hole Plug 90-4916
S&S CYCLE
MSRP: $24.95Now: $22.46Was: $24.95Not for use on OEM heads, Made in the U.S.A.20099082- SKU:
- 20099082
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COLOR/FINISH:
- ALUMINUM
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- STREET
- TYPE:
- COMPRESSION RELEASE
- UNITS:
- EACH
MSRP: $24.95Now: $22.46Was: $24.95 -
S&S CYCLE Cylinder Heads 900-0349
S&S CYCLE
$1,795.95High port flow gives great performance now, and more later when additional upgrades are done, Heads are fully assembled with springs and valves, Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see...09031292- SKU:
- 09031292
- Availability:
- Ships Same Business Day
- Weight:
- 30.20 LBS
- COLOR/FINISH:
- POWDER-COATED
- COLOR/FINISH:
- WRINKLE BLACK
- DISPLACEMENT:
- 91 CC
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
$1,795.95 -
S&S CYCLE Cylinder Heads - Twin Cam 106-4270
S&S CYCLE
$1,995.95High port flow gives great performance now, and more later when additional upgrades are done, Heads are fully assembled with springs and valves, Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see...09300068- SKU:
- 09300068
- Availability:
- Ships Same Business Day
- Weight:
- 27.95 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- DISPLACEMENT:
- 89 CC
- COLOR/FINISH:
- SILVER
- UNITS:
- PAIR
$1,995.95 -
S&S CYCLE Retro Top End Conversion Kit 106-1070
S&S CYCLE
$3,995.95Give your Shovelhead engine that nostalgic look of a Panhead, Kit consists of a set of S&S P-series cylinder heads with rocker cradles, S&S roller rocker arms, S&S hydraulic tappets, billet tappet guides, Quickee pushrods, pushrod cover clips and all...09300089- SKU:
- 09300089
- Availability:
- Ships Same Business Day
- Weight:
- 41.00 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER
- BORE SIZE IMPERIAL:
- STOCK BORE CYLINDER
- PRODUCT NAME:
- CONVERSION KIT
- UNITS:
- KIT
$3,995.95 -
S&S CYCLE Electrical Compression Release Unit 90-4914
S&S CYCLE
$193.95Electric compression releases open when you press the start button and close when the button is released, Kits include the required parts for installation, For ease of installation and removal, a special socket can be purchased separately, Not for use on...09300135- SKU:
- 09300135
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- UNITS:
- KIT
- TYPE:
- ELECTRIC
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- COMPRESSION RELEASE ASSEMBLY
$193.95 -
S&S CYCLE Retro Top End Conversion Kit 106-1071
S&S CYCLE
$4,499.95Give your Shovelhead engine that nostalgic look of a Panhead, Kit consists of a set of S&S P-series cylinder heads with rocker cradles, S&S roller rocker arms, S&S hydraulic tappets, billet tappet guides, Quickee pushrods, pushrod cover clips and all...09300090- SKU:
- 09300090
- Availability:
- Ships Same Business Day
- Weight:
- 40.87 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.625'
- PRODUCT NAME:
- CONVERSION KIT
$4,499.95 -
S&S CYCLE Performance Replacement Head 106-3466
S&S CYCLE
$1,559.95S&S heads are available to be used with stock-style flat-top pistons, Kits are fully assembled, and include stainless steel valves and high-lift (.585") springs, Intake manifold and gasket kits are sold separately; gasket kits contain head gaskets, base...09300060- SKU:
- 09300060
- Availability:
- Ships Same Business Day
- Weight:
- 24.00 LBS
- COLOR/FINISH:
- POWDER-COATED
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- DISPLACEMENT:
- 82 CC
$1,559.95 -
S&S CYCLE Performance Replacement Head 106-4570
S&S CYCLE
$1,559.95S&S heads are available to be used with stock-style flat-top pistons, Kits are fully assembled, and include stainless steel valves and high-lift (.585") springs, Intake manifold and gasket kits are sold separately; gasket kits contain head gaskets, base...09300061- SKU:
- 09300061
- Availability:
- Ships Same Business Day
- Weight:
- 24.25 LBS
- PRODUCT NAME:
- CYLINDER HEAD KIT
- DISPLACEMENT:
- 82 CC
- MATERIAL:
- STAINLESS STEEL
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- SUPER STOCK
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
$1,559.95 -
S&S CYCLE Replacement Silicone Solenoid Caps 50-1080
S&S CYCLE
$12.95Replacement silicone solenoid caps for S&S electronic and manual compression release kits, Made in the U.S.A.09300041- SKU:
- 09300041
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- WHITE
- PRODUCT NAME:
- CAP
- MATERIAL:
- SILICONE
- TYPE:
- COMPRESSION RELEASE
- UNITS:
- PAIR
$12.95 -
S&S CYCLE Cylinder Head Kit - Big Twin 90-1497
S&S CYCLE
$1,895.95Heads come completely assembled with valve seats, valves, guides, seals, .590" lift valve springs, collars and valve keepers, Complete kits also include rocker cover gaskets, head gaskets and miscellaneous hardware with instructions, Use OEM manifolds...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
$1,895.95 -
S&S CYCLE Cylinder Heads - Twin Cam 90-1106
S&S CYCLE
$1,795.95High port flow gives great performance now, and more later when additional upgrades are done, Heads are fully assembled with springs and valves, Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see...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
$1,795.95 -
EASTERN MOTORCYCLE PARTS Rocker Box Stud Set - Big Twin M-4-4538
EASTERN MOTORCYCLE PARTS
$47.95Includes eight long studs, two short studs and one top motor mount stud, One kit required for each head09300027- 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: $1,995.95High port flow gives great performance now, and more later when additional upgrades are done, Heads are fully assembled with springs and valves, Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see...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: $1,886.95Heads come completely assembled with valve seats, valves, guides, seals, .590" lift valve springs, collars and valve keepers, Complete kits also include rocker cover gaskets, head gaskets and miscellaneous hardware with instructions, Use OEM manifolds...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:
