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

269ProductsProduct

Filters

Shop Your Ride

S&S Cycle Pinion Gear For Harley

Vehicle Specific

S&S Cycle Pinion Gear For Harley

Feuling 630 Race Series Camchest Kit For Harley

Vehicle Specific

Feuling 630 Race Series Camchest Kit For Harley

$1,825^.⁹⁵$2,049^.⁹⁵

$106 in Rewards

Feuling Oil Pump Rebuild Kit For Harley

Vehicle Specific

Feuling Oil Pump Rebuild Kit For Harley

Feuling Remote Oil Pressure Gauge Kit For Harley 1984-2022

Vehicle Specific

Feuling Remote Oil Pressure Gauge Kit For Harley 1984-2022

S&S Cycle Super Stock Cylinder Heads For Harley Big Twin 1984-1999

Vehicle Specific

S&S Cycle Super Stock Cylinder Heads For Harley Big Twin 1984-1999

$1,799^.⁹⁵$1,949^.⁹⁵

$105 in Rewards

Feuling Race Series Oil System With Hydraulic Conversion For Harley Twin Cam 1999-2006

Vehicle Specific

Feuling Race Series Oil System With Hydraulic Conversion For Harley Twin Cam 1999-2006

$1,029^.⁹⁵$1,059^.⁹⁵

Feuling HP+ Oil System With Hydraulic Conversion For Harley Twin Cam 1999-2006

Vehicle Specific

Feuling HP+ Oil System With Hydraulic Conversion For Harley Twin Cam 1999-2006

S&S Cycle Transmission Case Trap Door Kit For Harley 1986-1999

Vehicle Specific

S&S Cycle Transmission Case Trap Door Kit For Harley 1986-1999

S&S Cycle 635 H.O. Easy Start Cam Kit For Harley Twin Cam 2006-2017

Vehicle Specific

S&S Cycle 635 H.O. Easy Start Cam Kit For Harley Twin Cam 2006-2017

$540^.⁹⁵$1,070^.⁹⁵

S&S Cycle 557 Easy Start Cam Kit For Harley Twin Cam 2006-2017

Vehicle Specific

S&S Cycle 557 Easy Start Cam Kit For Harley Twin Cam 2006-2017

$540^.⁹⁵$1,071^.⁴⁹

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

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 Oil Filter Bracket For Harley Twin Cam 1999-2006 Polished [Blemished - Very Good]

Vehicle Specific

S&S Cycle Oil Filter Bracket For Harley Twin Cam 1999-2006 Polished [Blemished - Very Good]

$197^.⁹⁶$219.95

Feuling Race Series Hydraulic Lifters For Harley 2017-2025 .0010 Oversize [Previously Installed]

Vehicle Specific

Feuling Race Series Hydraulic Lifters For Harley 2017-2025 .0010 Oversize [Previously Installed]

$254^.⁹⁶$299.95

Terry Components Oil Filler Spout Spacer Block For Harley Touring 1993-2006

Vehicle Specific

Terry Components Oil Filler Spout Spacer Block For Harley Touring 1993-2006

$128^.⁶⁷$142.95

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

Feuling American Flag Derby Cover For Harley Big Twin 1999-2018

Vehicle Specific

Feuling American Flag Derby Cover For Harley Big Twin 1999-2018

Feuling Head Bolt Kit For Harley

Vehicle Specific

Feuling Head Bolt Kit For Harley

$119^.⁹⁵$399^.⁹⁵

Feuling Hydraulic Stock Cam Chain Conversion Kit For Harley Twin Cam

Vehicle Specific

Feuling Hydraulic Stock Cam Chain Conversion Kit For Harley Twin Cam

S&S Cycle Cam Cover Kit For Harley Big Twin

Vehicle Specific

S&S Cycle Cam Cover Kit For Harley Big Twin

S&S Cycle H-Grind Cams For Harley Big Twin

Vehicle Specific

S&S Cycle H-Grind Cams For Harley Big Twin

S&S Cycle Oil Filter Bracket For Harley

Vehicle Specific

S&S Cycle Oil Filter Bracket For Harley

$195^.⁹⁵$399^.⁹⁵

Feuling Crankshaft Bearing Race Kit For Harley

Vehicle Specific

Feuling Crankshaft Bearing Race Kit For Harley

Feuling Valve Keepers For Harley

Vehicle Specific

Feuling Valve Keepers For Harley

$29^.⁹⁵$59^.⁹⁵

Feuling Wrenches Points Cover For Harley

Vehicle Specific

Feuling Wrenches Points Cover 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 Adjustable Pushrods For Harley

Vehicle Specific

Feuling Adjustable Pushrods For Harley

$199^.⁹⁵$229^.⁹⁵

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

$112 in Rewards

Feuling 594 Race Series Camchest Kit For Harley Twin Cam 1999-2006

Vehicle Specific

Feuling 594 Race Series Camchest Kit For Harley Twin Cam 1999-2006

$1,795^.⁹⁵$2,049^.⁹⁵

$105 in Rewards

Feuling HP+ 543 Hydraulic Conversion Camchest Kit For Harley Twin Cam 1999-2006

Vehicle Specific

Feuling HP+ 543 Hydraulic Conversion Camchest Kit For Harley Twin Cam 1999-2006

$1,929^.⁹⁵$1,939^.⁹⁵

$112 in Rewards

S&S Cycle 635 H.O. Cam Kit For Harley Twin Cam 2007-2017

Vehicle Specific

S&S Cycle 635 H.O. Cam Kit For Harley Twin Cam 2007-2017

$418^.⁹⁵$907^.⁹⁵

Feuling 630 Cam Kit For Harley Twin Cam 2006-2017

Vehicle Specific

Feuling 630 Cam Kit For Harley Twin Cam 2006-2017

$389^.⁹⁵$399^.⁹⁵

Feuling High Flow Hydraulic Conversion Camplate For Harley Twin Cam 1999-2006

Vehicle Specific

Feuling High Flow Hydraulic Conversion Camplate For Harley Twin Cam 1999-2006

Feuling 574 Cam Kit For Harley Twin Cam 1999-2006

Vehicle Specific

Feuling 574 Cam Kit For Harley Twin Cam 1999-2006

Feuling Highflow Camplate For Harley Milwaukee-Eight 2017-2026

Vehicle Specific

Feuling Highflow Camplate For Harley Milwaukee-Eight 2017-2026

Feuling 405 Reaper Camshaft For Harley Milwaukee-Eight 2017-2026

Vehicle Specific

Feuling 405 Reaper Camshaft For Harley Milwaukee-Eight 2017-2026

Feuling 521 Cam For Harley Milwaukee-Eight 2017-2026

Vehicle Specific

Feuling 521 Cam For Harley Milwaukee-Eight 2017-2026

Feuling 508 Cam For Harley Milwaukee-Eight 2017-2026

Vehicle Specific

Feuling 508 Cam For Harley Milwaukee-Eight 2017-2026

Feuling 472 Chain Drive Camshaft For Harley Milwaukee-Eight 2017-2026

Vehicle Specific

Feuling 472 Chain Drive Camshaft For Harley Milwaukee-Eight 2017-2026

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

S&S Cycle 640 Cam For Harley Big Twin Evo 1984-1999

Vehicle Specific

S&S Cycle 640 Cam For Harley Big Twin Evo 1984-1999

Drag Specialties Replacement Cylinders For Sportster 1200 1988-2003

Vehicle Specific

Drag Specialties Replacement Cylinders For Sportster 1200 1988-2003

$264^.⁹⁵$304^.¹⁷

S&S Cycle 625 Easy Start Cam Kit For Harley Twin Cam 2006-2017 Chain Driv... [Blemished - Good]

Vehicle Specific

S&S Cycle 625 Easy Start Cam Kit For Harley Twin Cam 2006-2017 Chain Driv... [Blemished - Good]

$432^.⁷⁶$449.95

Feuling 12 Point Primary Dress Up Kit For Harley Sportster 2004-2022

Vehicle Specific

Feuling 12 Point Primary Dress Up Kit For Harley Sportster 2004-2022

Feuling Velocity Stack For Harley Milwaukee-Eight 2017-2026

Vehicle Specific

Feuling Velocity Stack For Harley Milwaukee-Eight 2017-2026

Feuling Conversion Camshaft Installation Kits For Harley Twin Cam 1999-2006

Vehicle Specific

Feuling Conversion Camshaft Installation Kits For Harley Twin Cam 1999-2006

$93^.⁹⁵$123^.⁹⁵

S&S Cycle Valve Guide For Harley 1984-2004

Vehicle Specific

S&S Cycle Valve Guide For Harley 1984-2004

Feuling OE+ Camplate and Factory HD Oil Pump Bolt Kit For Harley Milwaukee-Eight 2017-2026

Vehicle Specific

Feuling OE+ Camplate and Factory HD Oil Pump Bolt Kit For Harley Milwaukee-Eight 2017-2026

Feuling Offset Sandwich Adapter Rebuild Kit For Harley Twin Cam 1999-2017

Vehicle Specific

Feuling Offset Sandwich Adapter Rebuild Kit For Harley Twin Cam 1999-2017

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

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

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

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

Feuling Valve Spring Seat Shims For Harley Milwaukee-Eight 2017-2026

Vehicle Specific

Feuling Valve Spring Seat Shims For Harley Milwaukee-Eight 2017-2026

Feuling Race Series Oil Pump and Camplate Kit For Harley

Vehicle Specific

Feuling Race Series Oil Pump and Camplate Kit For Harley

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

Feuling Engine Case 12 Point Hardware Kit For Harley

Vehicle Specific

Feuling Engine Case 12 Point Hardware Kit For Harley

$99^.⁹⁵$129^.⁹⁵

Feuling Race Series 594 Camchest Kit For Harley

Vehicle Specific

Feuling Race Series 594 Camchest Kit For Harley

$1,795^.⁹⁵$1,895^.⁹⁵

$105 in Rewards

S&S Cycle Cylinders For Harley

Vehicle Specific

S&S Cycle Cylinders For Harley

S&S Cycle 625 Cam Kit For Harley Twin Cam

Vehicle Specific

S&S Cycle 625 Cam Kit For Harley Twin Cam

$418^.⁹⁵$948^.⁹⁵

S&S Cycle 625 Easy Start Cam Kit For Harley Twin Cam

Vehicle Specific

S&S Cycle 625 Easy Start Cam Kit For Harley Twin Cam

$540^.⁹⁵$1,070^.⁹⁵

S&S Cycle 640 Easy Start Cam Kit For Harley Twin Cam

Vehicle Specific

S&S Cycle 640 Easy Start Cam Kit For Harley Twin Cam

$540^.⁹⁵$995^.⁹⁵

Feuling 508 Race Series Cam Chest Kit For Harley

Vehicle Specific

Feuling 508 Race Series Cam Chest Kit For Harley

$2,049^.⁹⁵$2,069^.⁹⁵

$118 in Rewards

Feuling 592 Race Series Cam Chest Kit For Harley

Vehicle Specific

Feuling 592 Race Series Cam Chest Kit For Harley

$2,049^.⁹⁵$2,069^.⁹⁵

$118 in Rewards

Feuling 521 Race Series Cam Chest Kit For Harley

Vehicle Specific

Feuling 521 Race Series Cam Chest Kit For Harley

$1,979^.⁹⁵$2,069^.⁹⁵

$114 in Rewards

Feuling 465 Race Series Cam Chest Kit For Harley

Vehicle Specific

Feuling 465 Race Series Cam Chest Kit For Harley

$114 in Rewards

Feuling Beehive High Load Valve Springs For Harley

Vehicle Specific

Feuling Beehive High Load Valve Springs For Harley

$379^.⁹⁵$609^.⁹⁵

Feuling 594 Cam Kit For Harley

Vehicle Specific

Feuling 594 Cam Kit For Harley

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

Feuling HP+ 405 Camchest Kit For Harley

Vehicle Specific

Feuling HP+ 405 Camchest Kit For Harley

$105 in Rewards

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

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 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 Tappet Lifter Block Covers For Harley Twin Cam 1999-2017

Vehicle Specific

S&S Cycle Tappet Lifter Block Covers For Harley Twin Cam 1999-2017

$335^.⁹⁵$360^.⁹⁵

Feuling Remote Oil Pressure Gauge For Harley Milwaukee-Eight 2017-2026

Vehicle Specific

Feuling Remote Oil Pressure Gauge For Harley Milwaukee-Eight 2017-2026

$189^.⁹⁵$199^.⁹⁵

Feuling 630 Cam Kit For Harley Twin Cam 1999-2006

Vehicle Specific

Feuling 630 Cam Kit For Harley Twin Cam 1999-2006

S&S Cycle 640 Cam Kit For Harley Twin Cam

Vehicle Specific

S&S Cycle 640 Cam Kit For Harley Twin Cam

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

Feuling Titanium Valve Spring Retainer Kit For Harley

Vehicle Specific

Feuling Titanium Valve Spring Retainer Kit For Harley

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.