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136 S&S M8 engine

M8 Engine Performance and Upgrades

2017-2025 M8 Engine Performance and Upgrades

96 products

309-591 ThunderMax Engine Control Module Kit with Integral Auto Tune'21-'24 Touring

309-591 ThunderMax Engine Control Module Kit with Integral Auto Tune'21-'24 Touring

$1,088

1861-0694 Weld-in O2 Bungs - 18 mm - 45°

1861-0694 Weld-in O2 Bungs - 18 mm - 45°

$24.99

Trask Big Papi Air Cleaner - Gen 2 M8

Trask Big Papi Air Cleaner - Gen 2 M8

$649.99

VTP M8 gen 2 Catapult heads intake flanges

VTP M8 gen 2 Catapult heads intake flanges

$100

#534-821 ZIPPER'S 4.085 M8 +.010 121

#534-821 ZIPPER'S 4.085 M8 +.010 121" +3.7CC PSKT

$619

Save $20.95 Feuling M-8 Beehive® Valve Spring Kit (includes titanium retainers)#1108

Feuling M-8 Beehive® Valve Spring Kit (includes titanium retainers)#1108

$599.95 $579

S&S CYCLE Cam Chain Tensioner - M8

S&S CYCLE Cam Chain Tensioner - M8

$109.99

HPI Milwaukee 8® Throttle Bodies

HPI Milwaukee 8® Throttle Bodies

$770

Sold out HPI 70MM M8® Center-Flo 2.0 Throttle Body

HPI 70MM M8® Center-Flo 2.0 Throttle Body

$880

CR616B M-8 cam

CR616B M-8 cam

$395

Red Shift Cams® RS532 for Generation II

Red Shift Cams® RS532 for Generation II

$329.99

Trask Assault Series CAM Cover With Window for

Trask Assault Series CAM Cover With Window for

$429.95

Trask M8 Crankcase Vented Transmission Top Cover

Trask M8 Crankcase Vented Transmission Top Cover

$349

COMETIC Cam Change Gasket Kit - M8 C10178-FP

COMETIC Cam Change Gasket Kit - M8 C10178-FP

$57.95

Power Vision 3 Fuel Injection Module for Harley

Power Vision 3 Fuel Injection Module for Harley

$499.99

Chris Revis 474 Rocket Cam M8 17-UP Install kit

Chris Revis 474 Rocket Cam M8 17-UP Install kit

$256

FEULING BA Series Air Cleaner Kit Chrome - Red Filter M8 17 up

FEULING BA Series Air Cleaner Kit Chrome - Red Filter M8 17 up

$599

S&S Chain Drive - Oil Cooled - 475 Cam - Chrome Pushrods - M8

S&S Chain Drive - Oil Cooled - 475 Cam - Chrome Pushrods - M8

$1,699.99

S&S Cam Chest Kit with Plate - Chain Drive - Water Cooled - 475 Cam - Chrome Pushrods - M8

S&S Cam Chest Kit with Plate - Chain Drive - Water Cooled - 475 Cam - Chrome Pushrods - M8

$1,721.99

Save $840 Andrews Cam Bolt-In 485 Complete Cam Installation Kits 17 up M8

Andrews Cam Bolt-In 485 Complete Cam Installation Kits 17 up M8

$1,099 $259

Save $15 S&S Quickee Pushrod Kit with Chrome Covers - M8

S&S Quickee Pushrod Kit with Chrome Covers - M8

$314.99 $299.99

Cycle Rama CR550 M8 Cam

Cycle Rama CR550 M8 Cam

$369

Save $69.01 Cycle Rama CR483M19 Complete Cam Installation Kit 17 to 19 M8

Cycle Rama CR483M19 Complete Cam Installation Kit 17 to 19 M8

$1,399 $1,329.99

ThunderMax Engine Control Module Kit with Integral Auto Tune - '21-'24 Softail 309-592

ThunderMax Engine Control Module Kit with Integral Auto Tune - '21-'24 Softail 309-592

$1,099

S&S Roller Rocker Arms - 1.640 Rocker Ratio - M8

S&S Roller Rocker Arms - 1.640 Rocker Ratio - M8

$675

2023.5 & Newer Catapult Gen 2 Intake for Use on Gen 1 Platform

2023.5 & Newer Catapult Gen 2 Intake for Use on Gen 1 Platform

$915

S&S Camshaft Kit - 475C Chain Drive - M8 330-0641

S&S Camshaft Kit - 475C Chain Drive - M8 330-0641

$310.99

Feuling M-8 Valve Spring Kit - Endurance Beehive (uses factory retainers) #1107

Feuling M-8 Valve Spring Kit - Endurance Beehive (uses factory retainers) #1107

$399.99

Save $5 Impact ECU replacement WBO2 Sensors

Impact ECU replacement WBO2 Sensors

$129.99 $124.99

ThunderMax 2023.5-Up Touring® (VVT) Center Cooled Models 309-605

ThunderMax 2023.5-Up Touring® (VVT) Center Cooled Models 309-605

$1,088.99

Zipper’s Milwaukee-Eight® Big Bore Cylinder Kits 117

Zipper’s Milwaukee-Eight® Big Bore Cylinder Kits 117" to 128" for 2024 + Gen 2

$1,399

Harley Davidson Touring Battery

Harley Davidson Touring Battery

$349.99

S&S Cam Chest Kit without Cams - Chain Drive - Water Cooled M8

S&S Cam Chest Kit without Cams - Chain Drive - Water Cooled M8

$1,499.99

S&S Cam Chest Kit without Cams for Chain Drive Oil Cooled M8

S&S Cam Chest Kit without Cams for Chain Drive Oil Cooled M8

$1,499.99

Trak Air Filter External Breather Kit (M8)

Trak Air Filter External Breather Kit (M8)

$169.99

77 Cycles Billet 6 speed Door M8 23.5 up

77 Cycles Billet 6 speed Door M8 23.5 up

$349.99

Cycle-Rama CR482 M-8 Complete Cam Installation Kit 17 up M8

Cycle-Rama CR482 M-8 Complete Cam Installation Kit 17 up M8

$349

Red Shift Cams® 472 for Milwaukee-Eight® Engines

Red Shift Cams® 472 for Milwaukee-Eight® Engines

$329.99

Red Shift Cams® 468 for Milwaukee-Eight® Engines

Red Shift Cams® 468 for Milwaukee-Eight® Engines

$329.99

Red Shift Cams® RS528 Cam Specifically Developed for Generation II Milwaukee-Eight® Engines

Red Shift Cams® RS528 Cam Specifically Developed for Generation II Milwaukee-Eight® Engines

$329.99

S&S Cycles MK136 Black Edition Engine

S&S Cycles MK136 Black Edition Engine

$11,999.95

M-8 Big Bore Kits 124

M-8 Big Bore Kits 124" and 128"

$1,608

Save $44.96 S&S 132

S&S 132" Big Bore Cylinder Kit - Black/Highlighted Fins - M8

$1,544.95 $1,499.99

Save $45.95 S&S 129

S&S 129" Big Bore Cylinder Kit - -107 M8 4.3/8 stroke

$1,544.95 $1,499

Cycle Rama CR470 Complete Cam Installation Kits 17 up M8

Cycle Rama CR470 Complete Cam Installation Kits 17 up M8

$320

2401-1525 M8-Gorilla Rocker Shaft and Stud Kit

2401-1525 M8-Gorilla Rocker Shaft and Stud Kit

$319.99

Save $400 310-1231 132

310-1231 132" Power Package Engine Performance Kit Oil Cool- Highlighted Fins - M8

$3,359.95 $2,959.95

Save $400 310-1229 132

310-1229 132" Power Package Engine Performance Kit water-cooled Black Highlighted Fins - M8

$3,359.95 $2,959.95

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