Engine

TTS 150-cam is designed to increase torque in the 1000-4000 RPM range. Developed for use with stock heads and pistons. Bolt-in design utilizes stock springs and pushrods. Not recommended for compression over 10.5:1. Fits: 2017-2022 Harley M8...

TTS 150-cam is designed to increase torque in the 2200-5200 RPM range. Developed for use with stock heads and pistons. Bolt-in design utilizes stock springs and pushrods. Not recommended for compression over 10.5:1. Fits: 2017-2022 Harley M8...

TTS 175-cam is designed to increase torque 2400-5800 RPM range. Developed for Milwaukee-Eight engines with stock heads and pistons. Bolt-in design, utilizing stock springs and pushrods. Not recommended for compression over 11.3:1. Fits: 2017-2022 Harley...

TTS 200-cam is designed to increase torque over a broad RPM range (1800-5500 RPM). Developed for Milwaukee-Eight engines with modified heads and pistons. Ideal for Stage III or IV kits. Not recommended for compression over 11:1. Requires use of high lift...

TTS 250-cam is designed to increase torque in the 2500-6000 RPM range. Developed for Milwaukee-Eight engines with modified heads and pistons. Ideal for Stage III or IV kits. Requires the use of high lift valve springs (such as TTS Performance Valve...

Stock replacement 17-tooth crankshaft cam drive sprocket. Machined steel, roller chain drive sprocket. Fits: 2017-2021 Harley Milwaukee Eight and 2007-2017 Twin Cam Engines 17-tooth Machined steel, stock replacement roller chain drive sprocket Repl...

Factory plastic OEM breathers can be problematic, we find the material easily distorts, especially after seeing excessive heat then the internal umbrella valve struggles to seal, causing oil carry over. FEULING Cylinder head breathers for M8 engines are...

If you're beefing up yourM8 motor with higher lift cams and heavier springs, than you want to include Feuling's Rocker Shaft Kit in your build. Stock replacement kit. These pieces are rated to give you 2x the strength of the factory rocker shafts. Fits:...

Trask Turbo Kit for Harley Davidson M8 Models. Bolt on big power. Fits: Harley M8 Motors Bolt on 40-50% more power on stock 107", 114" or 117" M8 motors. Trask Compressor and Turbine housings with Garrett internals Stainless Steel Pipe Kit that...

Why rebuild that old stock engine? Upgrade, and replace it with an all-new S&S® T111 engine. Get a 2-year warranty and a lot more power! S&S T111 engines are perfect for applications that require great horsepower and torque. The easy start...

The S&S Cycle Precision Tappets are a high performance replacement for both our previous standard and premium lifters for M8, Twin Cams and late Sportster® applications. Each Precision Tappet is hand assembled to exacting tolerances and...

128" Big Bore Kit for the 114" M8 Harley models. Black Granit with highlighted fins. For CVO models Fits: 2017-2022 117" M-Eight Motors Bolt-on kit, the largest cylinder bore possible without required machining of the crankcases 4.250" bore, 4.500"...

Upgrade your engine, but don't skimp on the bolts. Feuling ARP 12 Point Cam & Pinion Bolt kit will keep your engine secure. Stronger & Superior with a Tensile strength rated @ 17,000 psi. Fits: 2017-2020 Harley M8 Engines, 1999-2017 Twin Cam...

S&S Cam Install kit includes everything you need to service or change cams in your M8. Fits: 2017-2023 Harley M8 Engines Kits include all required parts needed when servicing or changing gear- or chain-drive cams in a Twin Cam motor Made in the...

The biggest Big Bore slip on kit available, S&S 132" Big Bore Kit for the 114" M8 Harley models. Choose between Highlighted and Non-Highlighted cylinders. Fits: 2017-2022 M-Eight 114" Harley Models Bolt-on kit, the largest cylinder bore possible...

The biggest Big Bore slip on kit available, S&S 129" Big Bore Kit for the 107" M8 Harley models. Choose between Highlighted and Non-Highlighted cylinders. Fits: 2017-2022 M-Eight 107" Harley Models Bolt-on kit, the largest cylinder bore possible...

S&S Cycle 4-1/4" Bore Cylinder Head Gasket Kit for Harley M8 models. Sold as a kit. Made in the USA Fits: 2017-2021 Harley M-Eight Models with 4-1/4" bore For standard 41/4” bore .030” Micropore head gaskets .014” Micropore...

Genuine James Primary Gasket, Seal and O-Ring Kit for 1994-2004 Harley Touring models. Fits: 1994-2004 Harley FLT/FLHT/FLHR/FXR models Top quality gaskets, seals and O-rings meet or exceed OEM specifications Primary gasket features silicone...

Genuine James Primary Gasket, Seal and O-Ring Kit for 2017-Up Harley M8 Touring models. Fits: 2017-2022 Harley Touring Models Top quality gaskets, seals and O-rings meet or exceed OEM specifications Primary gasket features silicone beading Made in...

Feuling now offers an easy fix to help elimiate your suming issues. The Short Sump Pump Plug eliminates blocking the internal engine case scavenge pick up hole. By using a shorter plug, you can eliminate the possibility of the plug blocking off this...

If you upgraded the cam in your M8 and need to beef up your valve springs, these are an excellent choice. Will fit with any cam and triple groove valve. Fits: 2017-2023 Harley M8 Models with triple groove valve PSI Valve Springs up to 640 Lift JHE...

Star Racing has brought their knowledge and experience over to the Harley world to bring you some serious cams. Their Full Race cam is designed to be used in either Big Bore Engines or High Revving 124-133 motors. Designed for maximum performance in the...

Star Racing is famous in the Drag racing community. They have brought their knowledge and experience over to the Harley world to bring you some serious cams. The F35A is the biggest and most powerful camshaft that will fit in a stock engine. It is a new...

Replace your stock M8 points cover with a Gloss Carbon Fiber cover from Slyfox. Fits: Harley M8 Models Fits M8 Motor Pre-Preg 3K Full Twill Aerospace Grade / Mil Spec Vacuum Bagged Autoclave Cured Gloss Finish

Replace your stock M8 points cover with a Carbon Fiber cover from Slyfox. Fits: Harley M8 Models Fits M8 Motor Pre-Preg 3K Full Twill Aerospace Grade / Mil Spec Vacuum Bagged Autoclave Cured

Add that touch of detail to your Twin Cam motor and trans with Santoro Fabworx Chacho Bolt Kit. This Deluxe kit comes with covers and Stainless-Steel Socket Head hardware to replace your OE bolts for the Rocker Boxes, Lifter Blocks, Cam Cover,...

Add that touch of detail to your Twin Cam motor and trans with Santoro Fabworx Chacho Bolt Kit. This Deluxe kit comes with covers and Stainless-Steel Socket Head hardware to replace your OE bolts for the Rocker Boxes, Lifter Blocks, Cam Cover,...

Add that touch of detail to your Twin Cam motor and trans with Santoro Fabworx Chacho Bolt Kit. This Deluxe kit comes with covers and Stainless-Steel Socket Head hardware to replace your OE bolts for the Rocker Boxes, Lifter Blocks, Cam Cover,...

Add that touch of detail to your Twin Cam motor and trans with Santoro Fabworx Chacho Bolt Kit. This Deluxe kit comes with covers and Stainless-Steel Socket Head hardware to replace your OE bolts for the Rocker Boxes, Lifter Blocks, Cam Cover,...

Add that touch of detail to your M8 motor and trans with Santoro Fabworx Chacho Bolt Kit. This Deluxe kit comes with covers and Stainless-Steel Socket Head hardware to replace your OE bolts for the Rocker Boxes, Lifter Blocks, Cam Cover, Transmission End...

Add that touch of detail to your M8 motor and trans with Santoro Fabworx Chacho Bolt Kit. This Deluxe kit comes with covers and Stainless-Steel Socket Head hardware to replace your OE bolts for the Rocker Boxes, Lifter Blocks, Cam Cover, Transmission End...

Add that touch of detail to your M8 motor and trans with Santoro Fabworx Chacho Bolt Kit. This Deluxe kit comes with covers and Stainless-Steel Socket Head hardware to replace your OE bolts for the Rocker Boxes, Lifter Blocks, Cam Cover, Transmission End...

Add that touch of detail to your M8 motor and trans with Santoro Fabworx Chacho Bolt Kit. This Deluxe kit comes with covers and Stainless-Steel Socket Head hardware to replace your OE bolts for the Rocker Boxes, Lifter Blocks, Cam Cover, Transmission End...

Turn your stock 107" into a monster of a 124". For Oil Cooled Milwaukee Eight models Only. Non-Highlighted fins with black pushrod tubes. Gear drive. Fits: Harley M8 Models (Oil Cooled) Big Bore Kit: 107" to 124" Big Bore Kit Winkle Black Finish...

Turn your stock 107" into a monster of a 124". For Oil Cooled Milwaukee Eight models Only. Highlighted fins with black pushrod tubes. Gear drive. Fits: Harley M8 Models (Oil Cooled) Big Bore Kit: 107" to 124" Big Bore Kit Wrinkle Black Finish...

Turn your stock 107" into a monster of a 124". For Oil Cooled Milwaukee Eight models Only. Highlighted fins with chrome pushrod tubes. Gear drive. Fits: Harley M8 Models (Oil Cooled) Big Bore Kit: 107" to 124" Big Bore Kit Winkle Black Finish with...

From Star Racing we are now offering their line of cams for M8 models. The 3/4 Cam is their best selling cam that gives you the most lift for reliable performance. Great for 124-133 kits. Fits: 2017-2023 Harley M8 Models Best Seller - Most Lift for...

Upgrade your entire camchest in one easy to order kit from S&S Cycle. Choose from a 465, 475, 540 or 550 cam. Chain drive with black pushrod tubes for Twin cooled M8 motors. Fits: 2017-2021 Harley Twin Cooled M-Eight Models All parts in each kit...

Upgrade your entire camchest in one easy to order kit from S&S Cycle. Choose from a 465, 475, 540 or 550 cam. Chain drive with chrome pushrod tubes for Twin cooled M8 motors. Fits: 2017-2021 Harley Twin Cooled M-Eight Models All parts in each kit...

S&S gives you 30% increase in HPI and torque over stock with their V111 Long Block Engines. Short stroke for less vibration. Fits: 1984-99 Harley-Davidson® big twin chassis and custom frames designed for Evolution® big twin engines. +30%...