JavaScript Disabled

To get the full RevZilla experience, enable JavaScript in your browser settings and refresh this page.

Free Shipping over $49.99 ZillaCash: $5 for every $100 Customer Service From Riders Free Shipping over $49.99 ZillaCash: $5 for every $100 Customer Service From Riders Free Shipping over $49.99 ZillaCash: $5 for every $100 Customer Service From Riders Free Shipping over $49.99 ZillaCash: $5 for every $100 Customer Service From Riders Free Shipping over $49.99 ZillaCash: $5 for every $100 Customer Service From Riders

Free Shipping over $49.99 ZillaCash: $5 for every $100 Customer Service From Riders

H-D ENGINE PERFORMANCE MODS

Our Go-To High Performance Parts Picks For Harley

Engine Performance Mods for HD

273ProductsProduct

Filters

Shop Your Ride

S&S Cycle 475 Cam Kit For Harley Milwaukee-Eight 2017-2025

Vehicle Specific

S&S Cycle 475 Cam Kit For Harley Milwaukee-Eight 2017-2025

$299^.⁹⁵$465^.⁹⁵

Dynatek Dyna S Dual Fire Ignition Kit For Harley 1970-1999

Vehicle Specific

Dynatek Dyna S Dual Fire Ignition Kit For Harley 1970-1999

S&S Cycle Pushrod Cover O-Ring Kit For Harley 1984-2022

Vehicle Specific

S&S Cycle Pushrod Cover O-Ring Kit For Harley 1984-2022

Dynatek Dyna S Single Fire Ignition Kit For Harley 1970-1999

Vehicle Specific

Dynatek Dyna S Single Fire Ignition Kit For Harley 1970-1999

$359^.⁹⁸$399.99

Feuling Exhaust Stud Kit For Harley EVO, Twin Cam, Sportster 1984-2022

Vehicle Specific

Feuling Exhaust Stud Kit For Harley EVO, Twin Cam, Sportster 1984-2022

$89^.⁹⁵$92.95

S&S Cycle Headbolt Kit For Harley 1984-2022

Vehicle Specific

S&S Cycle Headbolt Kit For Harley 1984-2022

S&S Cycle Rocker Roller Arms For Harley 1984-2022

Vehicle Specific

S&S Cycle Rocker Roller Arms For Harley 1984-2022

$649^.⁹⁵$695^.⁹⁵

S&S Cycle Head Gaskets For Harley 1984-2003

Vehicle Specific

S&S Cycle Head Gaskets For Harley 1984-2003

S&S Cycle Rocker Arms For Harley 1984-2022

Vehicle Specific

S&S Cycle Rocker Arms For Harley 1984-2022

S&S Cycle Valve Guide For Harley 1984-2004

Vehicle Specific

S&S Cycle Valve Guide For Harley 1984-2004

S&S Cycle Rocker Arm Shafts For Harley 1984-2022

Vehicle Specific

S&S Cycle Rocker Arm Shafts For Harley 1984-2022

Feuling O2 Sensor Adapter 18mm to 12mm

Feuling O2 Sensor Adapter 18mm to 12mm

Accel Single / Dual Fire Ignition Module For Harley 1970-1999

Vehicle Specific

Accel Single / Dual Fire Ignition Module For Harley 1970-1999

Feuling Remote Oil Pressure Gauge Kit For Harley 1984-2022

Vehicle Specific

Feuling Remote Oil Pressure Gauge Kit For Harley 1984-2022

Feuling Race Series Solid Lifters For Harley Twin Cam / Milwaukee-Eight / Sportster 1999-2022

Vehicle Specific

Feuling Race Series Solid Lifters For Harley Twin Cam / Milwaukee-Eight / Sportster 1999-2022

Drag Specialties Replacement Rocker Arms With Bushings For Harley 1984-2022

Vehicle Specific

Drag Specialties Replacement Rocker Arms With Bushings For Harley 1984-2022

Feuling Viton Valve Seals For Harley

Vehicle Specific

Feuling Viton Valve Seals For Harley

$15^.⁹⁵$19^.⁹⁵

S&S Cycle Oil Filter For Harley

Vehicle Specific

S&S Cycle Oil Filter For Harley

$20^.⁹⁵$24^.⁰⁷

Feuling Econo Beehive Valve Spring Kit For Harley

Vehicle Specific

Feuling Econo Beehive Valve Spring Kit For Harley

Feuling Econo Beehive Valve Spring with Titanium Retainers Kit For Harley

Vehicle Specific

Feuling Econo Beehive Valve Spring with Titanium Retainers Kit For Harley

Feuling Head Bolt Kit For Harley

Vehicle Specific

Feuling Head Bolt Kit For Harley

$119^.⁹⁵$399^.⁹⁵

S&S Cycle Teardrop Air Cleaner Kit For Super E&G Carburetors

Vehicle Specific

S&S Cycle Teardrop Air Cleaner Kit For Super E&G Carburetors

S&S Cycle Teardrop Air Cleaner Kit For Harley CV

Vehicle Specific

S&S Cycle Teardrop Air Cleaner Kit For Harley CV

$395^.⁹⁵$399^.⁹⁵

S&S Cycle Sidewinder Valve Spring Kits For Harley

Vehicle Specific

S&S Cycle Sidewinder Valve Spring Kits For Harley

$254^.⁹⁵$257^.⁹⁵

Feuling Valve Keepers For Harley

Vehicle Specific

Feuling Valve Keepers For Harley

$29^.⁹⁵$59^.⁹⁵

S&S Cycle Stealth Air Cleaner Kit For Harley

Vehicle Specific

S&S Cycle Stealth Air Cleaner Kit For Harley

$195^.⁹⁵$249^.⁹⁵

Feuling Endurance Beehive Valve Spring Kit For Harley

Vehicle Specific

Feuling Endurance Beehive Valve Spring Kit For Harley

$379^.⁹⁵$609^.⁹⁵

Feuling Liquid Filled Rear Port Oil Pressure Gauge

Feuling Liquid Filled Rear Port Oil Pressure Gauge

Feuling Inner Camshaft Bearings For Harley

Vehicle Specific

Feuling Inner Camshaft Bearings For Harley

$18^.⁹⁵$42^.⁹⁵

S&S Cycle High Output 3 Ohm Single Fire Ignition Coil For Harley

S&S Cycle High Output 3 Ohm Single Fire Ignition Coil For Harley

Feuling 12 Point External Engine Hardware Kit For Harley

Vehicle Specific

Feuling 12 Point External Engine Hardware Kit For Harley

$219^.⁹⁵$399^.⁹⁵

Feuling Race Series Hydraulic Lifters For Harley

Vehicle Specific

Feuling Race Series Hydraulic Lifters For Harley

$299^.⁹⁵$319^.⁹⁵

S&S Cycle Hydraulic Lifters For Harley

Vehicle Specific

S&S Cycle Hydraulic Lifters For Harley

$381^.⁹⁵$409^.⁹⁵

Feuling Beehive High Load Valve Springs For Harley

Vehicle Specific

Feuling Beehive High Load Valve Springs For Harley

$379^.⁹⁵$609^.⁹⁵

Feuling Titanium Valve Spring Retainer Kit For Harley

Vehicle Specific

Feuling Titanium Valve Spring Retainer Kit For Harley

S&S Cycle Complete Pushrod And Tube Kit For Harley

Vehicle Specific

S&S Cycle Complete Pushrod And Tube Kit For Harley

$249^.⁹⁵$326^.⁹⁵

S&S Cycle Super E Carburetor Kit For Harley

Vehicle Specific

S&S Cycle Super E Carburetor Kit For Harley

$795^.⁹⁵$895^.⁹⁵

S&S Cycle High Output 0.5 Ohm Single Fire Ignition Coil For Harley

S&S Cycle High Output 0.5 Ohm Single Fire Ignition Coil For Harley

James Rocker Box Gasket Kit For Harley

Vehicle Specific

James Rocker Box Gasket Kit For Harley

$51^.⁹⁵$100^.⁹⁵

Feuling HP+ Hydraulic Lifters For Harley

Vehicle Specific

Feuling HP+ Hydraulic Lifters For Harley

$219^.⁹⁵$289^.⁹⁵

James Gasket Engine Gasket Set For Harley

Vehicle Specific

James Gasket Engine Gasket Set For Harley

$126^.⁹⁵$236^.⁹⁵

James Cam Chest Gasket Kit For Harley

Vehicle Specific

James Cam Chest Gasket Kit For Harley

$29^.⁹⁵$58^.⁹⁵

Feuling HP+ One Piece Pushrods For Harley

Vehicle Specific

Feuling HP+ One Piece Pushrods For Harley

Feuling Map Sensor For Harley

Vehicle Specific

Feuling Map Sensor For Harley

$69^.⁹⁵$89^.⁹⁵

S&S Cycle Mini Teardrop Stealth Air Cleaner Kit For Harley

Vehicle Specific

S&S Cycle Mini Teardrop Stealth Air Cleaner Kit For Harley

S&S Cycle Stealth Air Cleaner Kit For Harley EFI

Vehicle Specific

S&S Cycle Stealth Air Cleaner Kit For Harley EFI

$166^.⁹⁵$399^.⁹⁵

Feuling 12mm Narrow Band O2 Sensors For Harley

Vehicle Specific

Feuling 12mm Narrow Band O2 Sensors For Harley

$99^.⁹⁵$109^.⁹⁵

S&S Cycle Adjustable Chromoly Pushrods For Harley

Vehicle Specific

S&S Cycle Adjustable Chromoly Pushrods For Harley

Feuling Liquid Filled Bottom Port Oil Pressure Gauge

Feuling Liquid Filled Bottom Port Oil Pressure Gauge

Feuling Fuel Injector Adapter EV-6 Connector to EV-1 Injector

Feuling Fuel Injector Adapter EV-6 Connector to EV-1 Injector

Feuling Fuel Injector Adapter EV-1 Connector to EV-6 Injector

Feuling Fuel Injector Adapter EV-1 Connector to EV-6 Injector

S&S Cycle Synthetic Oil Change Kit For Harley

Vehicle Specific

S&S Cycle Synthetic Oil Change Kit For Harley

$175^.⁹⁵$179^.⁹⁵

Feuling Cam Chain Tensioner Pads For Harley Twin Cam 2006-2017

Vehicle Specific

Feuling Cam Chain Tensioner Pads For Harley Twin Cam 2006-2017

S&S Cycle Tappet Cuffs For Harley Milwaukee-Eight 2017-2026

Vehicle Specific

S&S Cycle Tappet Cuffs For Harley Milwaukee-Eight 2017-2026

S&S Cycle HI-4N Single & Dual Fire Ignition Module For Harley 1984-1999

Vehicle Specific

S&S Cycle HI-4N Single & Dual Fire Ignition Module For Harley 1984-1999

S&S Cycle Hydraulic Cam Chain Tensioner Kit For Harley Twin Cam 2006-2017

Vehicle Specific

S&S Cycle Hydraulic Cam Chain Tensioner Kit For Harley Twin Cam 2006-2017

Feuling Idle Air Control Module For Harley Touring, Softail, Dyna 2006-2017

Vehicle Specific

Feuling Idle Air Control Module For Harley Touring, Softail, Dyna 2006-2017

S&S Cycle 551 Cam Kit For Harley Twin Cam 1999-2006 Chain Drive Cams [Open Box]

Vehicle Specific

S&S Cycle 551 Cam Kit For Harley Twin Cam 1999-2006 Chain Drive Cams [Open Box]

$377^.⁰⁶$418.95

S&S Cycle Crankcase Reed Breather Valve For Harley EVO 1993-2000

Vehicle Specific

S&S Cycle Crankcase Reed Breather Valve For Harley EVO 1993-2000

$165^.⁹⁵$171^.⁹⁵

S&S Cycle 98" Big Bore Kit For Harley Big Twin 1999-2006

Vehicle Specific

S&S Cycle 98" Big Bore Kit For Harley Big Twin 1999-2006

$1,358^.⁹⁵$1,386^.⁹⁵

$151 in Rewards

Feuling 18mm Narrow Band 02 Sensor For Harley Dyna, Softail, Touring, V-Rod 2006-2011

Vehicle Specific

Feuling 18mm Narrow Band 02 Sensor For Harley Dyna, Softail, Touring, V-Rod 2006-2011

Feuling 12 Point Rocker Cover Bolt Kit For Harley Twin Cam 1999-2017

Vehicle Specific

Feuling 12 Point Rocker Cover Bolt Kit For Harley Twin Cam 1999-2017

Feuling Quick Install Adjustable Pushrod And Tube Kit For Harley Twin Cam 1999-2017

Vehicle Specific

Feuling Quick Install Adjustable Pushrod And Tube Kit For Harley Twin Cam 1999-2017

S&S Cycle 509 Cam Kit For Harley Twin Cam 1999-2006

Vehicle Specific

S&S Cycle 509 Cam Kit For Harley Twin Cam 1999-2006

$399^.⁹⁵$948^.⁹⁵

Feuling 12 Point Chassis & Trim Dress Up Kit For Harley

Vehicle Specific

Feuling 12 Point Chassis & Trim Dress Up Kit For Harley

$159^.⁹⁵$399^.⁹⁵

S&S Cycle MR103 Easy Start Cam Kit For Harley Twin Cam 2006-2017

Vehicle Specific

S&S Cycle MR103 Easy Start Cam Kit For Harley Twin Cam 2006-2017

$540^.⁹⁵$1,070^.⁹⁵

Feuling OE+ Hydraulic Cam Chain Tensioner Conversion Kit For Harley 2001-2006

Vehicle Specific

Feuling OE+ Hydraulic Cam Chain Tensioner Conversion Kit For Harley 2001-2006

$100 in Rewards

S&S Cycle MR103 Cam Kit For Harley Twin Cam 2006-2017

Vehicle Specific

S&S Cycle MR103 Cam Kit For Harley Twin Cam 2006-2017

Feuling Outer Cam Bearings For Harley Twin Cam 1999-2006

Vehicle Specific

Feuling Outer Cam Bearings For Harley Twin Cam 1999-2006

$49^.⁹⁵$69^.⁹⁵$50.95$69.95

Feuling Outer Cam Sprocket For Harley Twin Cam 2006-2017

Vehicle Specific

Feuling Outer Cam Sprocket For Harley Twin Cam 2006-2017

Feuling Hydraulic Cam Chain Tensioner Assemblies For Harley Twin Cam 2006-2017

Vehicle Specific

Feuling Hydraulic Cam Chain Tensioner Assemblies For Harley Twin Cam 2006-2017

$79^.⁹⁵$159^.⁹⁵

Feuling Outer Crank Sprocket For Harley Big Twin 2006-2026

Vehicle Specific

Feuling Outer Crank Sprocket For Harley Big Twin 2006-2026

Feuling Camshaft Sprocket Thrust Washer Kit For Harley Twin Cam / Milwaukee-Eight 2006-2026

Vehicle Specific

Feuling Camshaft Sprocket Thrust Washer Kit For Harley Twin Cam / Milwaukee-Eight 2006-2026

S&S Cycle 635 H.O. Easy Start Cam Kit For Harley Twin Cam 2006-2017 Gear Drive Cams [Open Box]

Vehicle Specific

S&S Cycle 635 H.O. Easy Start Cam Kit For Harley Twin Cam 2006-2017 Gear Drive Cams [Open Box]

$459^.⁸¹$1,070.95

Feuling Conversion Cams For Harley Twin Cam 1999-2006

Vehicle Specific

Feuling Conversion Cams For Harley Twin Cam 1999-2006

Feuling OE+ Hydraulic Cam Chain Conversion Camchest Kits For Harley Twin Cam 1999-2006

Vehicle Specific

Feuling OE+ Hydraulic Cam Chain Conversion Camchest Kits For Harley Twin Cam 1999-2006

$199 in Rewards

Feuling Silent Cam Chain For Harley Twin Cam 1999-2006

Vehicle Specific

Feuling Silent Cam Chain For Harley Twin Cam 1999-2006

Feuling Inner Roller Cam Chain For Harley Twin Cam 2006-2017

Vehicle Specific

Feuling Inner Roller Cam Chain For Harley Twin Cam 2006-2017

S&S Cycle Complete Pushrod And Tube Kit For Harley Twin Cam 1999-2017 Adjustable [Open Box]

Vehicle Specific

S&S Cycle Complete Pushrod And Tube Kit For Harley Twin Cam 1999-2017 Adjustable [Open Box]

$224^.⁹⁶$249.95

S&S Cycle Tappet Guide Lifter Blocks For Harley Big Twin 1984-1999

Vehicle Specific

S&S Cycle Tappet Guide Lifter Blocks For Harley Big Twin 1984-1999

S&S Cycle HP103 Easy Start Cam Kit For Harley Twin Cam 2007-2017

Vehicle Specific

S&S Cycle HP103 Easy Start Cam Kit For Harley Twin Cam 2007-2017

$486^.⁸⁶$540.95

Feuling 12 Point Lifter Block Bolt Kit For Harley Twin Cam 1999-2017

Vehicle Specific

Feuling 12 Point Lifter Block Bolt Kit For Harley Twin Cam 1999-2017

S&S Cycle 585CEZ Easy Start Camchest Kit For Harley Twin Cam 2006-2017

Vehicle Specific

S&S Cycle 585CEZ Easy Start Camchest Kit For Harley Twin Cam 2006-2017

$226 in Rewards

S&S Cycle Head Gaskets For Harley Twin Cam 1999-2017

Vehicle Specific

S&S Cycle Head Gaskets For Harley Twin Cam 1999-2017

Accel EFI Super Coil For Harley Big Twin 2008-2017

Vehicle Specific

Accel EFI Super Coil For Harley Big Twin 2008-2017

$263^.⁶⁸$281.95

Feuling Quick Install Adjustable Pushrod Kit For Harley Twin Cam 1999-2017

Vehicle Specific

Feuling Quick Install Adjustable Pushrod Kit For Harley Twin Cam 1999-2017

S&S Cycle Compression Release Kit For Harley Twin Cam 1999-2017

Vehicle Specific

S&S Cycle Compression Release Kit For Harley Twin Cam 1999-2017

$448^.⁹⁵$565^.⁹⁵

Feuling Offset Sandwich Oil Cooler Adapter For Harley Twin Cam 1999-2017

Vehicle Specific

Feuling Offset Sandwich Oil Cooler Adapter For Harley Twin Cam 1999-2017

$179^.⁹⁵$199^.⁹⁵

S&S Cycle Teardrop Air Cleaner Kit For Harley EFI Big Twin 2001-2017 Chrome [Blemished - Very Good]

Vehicle Specific

S&S Cycle Teardrop Air Cleaner Kit For Harley EFI Big Twin 2001-2017 Chrome [Blemished - Very Good]

$356^.³⁶$395.95

S&S Cycle 600 Cam For Harley Big Twin Evo 1984-1999

Vehicle Specific

S&S Cycle 600 Cam For Harley Big Twin Evo 1984-1999

Feuling Quick Install Pushrod Tube Kit For Harley Twin Cam 1999-2017

Vehicle Specific

Feuling Quick Install Pushrod Tube Kit For Harley Twin Cam 1999-2017

Feuling Outer Roller Cam Chain For Harley Big Twin 2006-2026

Vehicle Specific

Feuling Outer Roller Cam Chain For Harley Big Twin 2006-2026

Feuling HP+ 574 Hydraulic Conversion Camchest Kit For Harley Twin Cam 1999-2006

Vehicle Specific

Feuling HP+ 574 Hydraulic Conversion Camchest Kit For Harley Twin Cam 1999-2006

$209 in Rewards

S&S Cycle 510 Cam For Harley Big Twin Evo 1984-1999

Vehicle Specific

S&S Cycle 510 Cam For Harley Big Twin Evo 1984-1999

S&S Cycle 561 Cam For Harley Big Twin Evo 1984-1999

Vehicle Specific

S&S Cycle 561 Cam For Harley Big Twin Evo 1984-1999

S&S Cycle 635 H.O. Easy Start Cam Kit For Harley Twin Cam 2006-2017 Gear Drive Cams [Open Box]

Vehicle Specific

S&S Cycle 635 H.O. Easy Start Cam Kit For Harley Twin Cam 2006-2017 Gear Drive Cams [Open Box]

$459^.⁸¹$1,070.95

1 2 3 of 3

$39.99/yr.

Spend Less. Ride More.

5% RPM Cash Back*
10% Off Over 70 Brands
$15 in RPM Cash When You Join
Free 2-Day Shipping & Free Returns*
And more!

Become a member today! Learn More

By purchasing and enrolling in Riders Preferred Membership, you agree to the Program Terms and Conditions. *Some exclusions apply: 10% RPM discount applies on full price and sale price Exclusive Brands. 10% RPM discount applies on additional select brands at full price. Exclusions apply. RPM free 2-day shipping applies on qualifying items, contiguous U.S. only. Not available for AK, HI, or U.S. Territories. View shipping policies. RPM free returns apply on qualifying items and are processed on standard return timeline, contiguous U.S. only. View return policy.