More motor.
Built right.
Complete S&S crate engines, big bore and stage kits, cams, heads, oil pumps and every gasket and bolt in between, for Milwaukee-Eight, Twin Cam, Evo, Sportster and Shovelhead.
Shop by category
Start with the part of the motor you're working on, then narrow by brand, engine and finish on the collection page.
Build your stage
Most Harley builds follow the same path. Pick where you are today and we'll point you to the parts for the next step. Every stage needs a matching tune.
Intake, exhaust & tune
The first step on almost every bike. A high-flow air cleaner and exhaust, with fuel dialed in to match.
- High-flow air cleaner
- Slip-ons or full system
- Tuner or fuel module
Camshafts & support
A bolt-in cam is where the motor starts to feel different. Plan the lifters, pushrods and oiling at the same time.
- Bolt-in cam kit
- Adjustable pushrods & lifters
- Cam plate & oil pump
Big bore & pistons
More cubic inches through bigger cylinders and pistons, usually paired with a cam from Stage 2 and upgraded head gaskets.
- Big bore cylinder kit
- Pistons & rings
- Head & base gaskets
Heads, stroker or crate
Performance heads and valvetrain, a stroker bottom end, or skip the build and drop in a complete S&S engine.
- Cylinder heads & springs
- Flywheels & rods
- Complete crate engine
S&S complete engines
Assembled, tested and ready to bolt in. From the 136" Milwaukee-Eight MK136 to Twin Cam long blocks and Evo-style motors for custom frames, we carry the full S&S line and can help you pick the right one.
Featured brands
The engine lines we trust in our own shop, from full builds to the oiling and cooling that keeps them alive.
S&S Cycle
Crate engines, Hot Set Up and big bore kits, cams, heads and oil pumps. The deepest engine catalog we carry.
Shop S&S →
Feuling
Oil pumps, cam plates, cams, lifters and HP+ oil systems. The go-to for oil pressure and valvetrain on Twin Cam and M8.
Shop Feuling →
Darkhorse
Man O' War flywheels, crank and bottom-end hardware, plus the engine stands and tools to build it right.
Shop Darkhorse →
UltraCool
Bolt-on oil cooler kits for Touring, Softail and Sportster. Lower oil temps for big motors and hot Southern California traffic.
Shop UltraCool →
Covers that finish it
Derby, points, cam and rocker covers from Arlen Ness, Performance Machine, Trask, Thrashin and Drag Specialties.
Shop covers →Before you build
Know your engine, plan the supporting parts, and budget for the tune. These are the questions our techs ask first.
Which engine do I have?
Parts are almost always engine-specific. Match your year first, then check fitment on the product page.
| Engine | Years |
|---|---|
| Milwaukee-Eight | Touring '17-up, Softail '18-up (107 / 114 / 117 / 121) |
| Twin Cam | '99-'17 Big Twin (88 / 96 / 103 / 110) |
| Evolution | '84-'99 Big Twin (80) |
| Sportster (Evo) | '86-'21 (883 / 1200) |
| Shovelhead | '66-'84 Big Twin |
Cams need support
A cam swap is more than the cams. Plan on lifters, adjustable pushrods, cam bearings and gaskets, and check whether your cam plate and oil pump are up to the job.
On Twin Cam, higher-lift cams often call for upgraded valve springs and a hydraulic cam chain tensioner or gear-drive conversion.
Oil pressure & heat
Bigger motors make more heat. A high-volume oil pump keeps pressure up, and an oil cooler helps in stop-and-go traffic.
Add an oil pressure gauge so you can see what the motor is doing after the build, not just guess.
Tuning & emissions
Every stage changes how much air the motor moves, so the fuel map needs to change too. Budget for a tuner and a dyno or street tune.
Some parts are marked Race Only or 49-State. Check your state's emissions rules before ordering, especially in California.
Common questions
Do I need a tuner after a cam or big bore kit?
Yes. Changing the cam or displacement changes airflow, and the stock map won't match. Running without a tune can make the motor run lean and hot.
Chain drive or gear drive cams on a Twin Cam?
Every Twin Cam is chain drive from the factory. Gear drive conversions remove the chains and tensioners, but need gear-drive cams and a support plate that match your year.
Should I replace the oil pump with the cams?
While the cam chest is open it's the easiest time to do it. Many riders pair a cam upgrade with a high-volume pump or a complete cam plate and pump kit.
Long block vs. complete engine?
A long block usually ships without some parts, like the intake, ignition or charging system, so you reuse or add your own. A complete engine includes more of what you need to run.
How do I know a part fits my bike?
Use the engine buttons at the top of this page, then check the year range in the product title. Still unsure? Send us your year and model before you order.
Can you install it?
Yes. Cam swaps, big bore kits, oil pumps and crate engine installs are done in our Anaheim shop, with the tune to match.
Fitment checked before it ships
Send us the year, model and what's already in the motor, and we'll confirm the parts before the order goes out.
We build these motors
Cams, big bores and crate swaps come through our service bays every week, so we know which parts work together.
Shovelhead to M8
Vintage covers and gaskets through Milwaukee-Eight cam kits and crate engines, all sorted by engine.
Installed in Anaheim
Want it built and tuned? Email Support@lifestylecycles.com and we will book the work.
Build the motor you want.
Crate engines, big bore and stage kits, cams, heads, oiling, covers, gaskets and hardware for Harley-Davidson V-Twins. Not sure where to start? Ask before you order.