Harley-Davidson® of Frederick & Williamsport Longblock Program

Get all the details of our fantastic LongBlock Program here at Harley-Davidson of Frederick. We have a fantastic factory trained and certified service department here at the dealership. We also have a fully stocked and onsite parts department too.

While you’re here, be sure and check out our latest inventory! We get new motorcycles in every day so don’t miss out on our new Harley Davidson motorcycles and used Harley Davidson motorcycles. We’re a full service dealership which means we also offer competitive motorcycle financing, tests rides, trade-in evaluations and so much more! Stop into our Frederick, MD dealership, call or contact us today to learn more.



Your engine is the heart and soul of your Harley-Davidson® motorcycle. When the miles start to add up, a Harley-Davidson® LongBlock can put the rumble back in your ride simply, quickly, and affordably.


When it comes time to repower your Twin Cam-equipped motorcycle, the first stop should be our dealership. We can install a LongBlock replacement engine that is manufactured from 100% new Original Equipment parts and subjected to the same rigorous testing as all Harley® engines.

Why Should I Consider A Longblock?

Unlike an engine rebuild from the repair shop down the street, the Harley-Davidson® LongBlock is manufactured from 100% new Original Equipment components, and is built to the latest factory specifications. Engine includes upgraded Screamin’ Eagle® lefty crankcase bearing, Screamin’ Eagle® cam bearings and Screamin’ Eagle performance tappets to handle higher stress loads and performance upgrades. In addition, ’99-’06 LongBlocks are upgraded with late-model hydraulic cam tensioners, high-volume oil pump and billet cam plate. ’07-’13 103CI and 110CI engines feature factory-installed Automatic Compression Releases.

What Does The H-D® Longblock Include?

The crankcase is pre-assembled with flywheels, connecting rods, bearings, seals, cylinders, pistons, rings, heads, valves, valve springs, tappets and pushrod covers. Also included and ready for Dealer installation are top end rocker arm supports, rocker arms and shafts, pushrods, and breathers. The LongBlock also includes cam support plate, cam plate bearings, cam and timing chain drive, hydraulic tensioners and all required gaskets and new hardware.

Are Upgrades Available?

You can choose silver or black- highlighted engines to match your styling direction. Bikes originally equipped with Twin Cam 88 engines can upgrade to 95 or 103CI displacement, and Twin Cam 96-equipped models can be repowered with 103 or 110CI engines, based on specific model fitment. Upgrades require model-specific ECM recalibration (sold separately). *Displacement upgrades are available for vehicles previously equipped with street compliant big bore kits only.

What Else Do I Need?

LongBlock is sold without cam shafts, lower rocker boxes, upper rocker box covers, or cam cover. You have the option to re-install your current cams and covers, or select from a wide assortment of performance and custom engine cover options.

Fast And Easy!

Just bring your Harley® motorcycle to Harley-Davidson® of Frederick & Williamsport. We will remove the engine from the frame, ship the left crankcase half to Harley-Davidson®, and in a short time, you will have a new LongBlock back, ready for the dealer to reinstall in your bike. Your engine retains its original Vehicle Identification Number (VIN) for easy title exchange and registration.

 See Options and Pricing

 Make Service Apointment

Click on the image below for more information.

Harley-Davidson® Long Block Engine