Can I use my existing performance carburetor with this engine?

Yes, this S&S T111 Long Block Engine is specifically designed to allow you to reuse your existing performance carburetor or EFI throttle body. The heads are specially machined to compensate for increased cylinder length, allowing stock-length manifolds to fit.

What Harley-Davidson models does this engine fit?

This engine fits a range of 1999-2006 Harley-Davidson Big Twin models, including various Road King, Electra Glide, Road Glide, and Dyna models. It is explicitly not compatible with Harley-Davidson Softail models.

Does this engine come with a fuel system or ignition?

No, this long block engine does not include fuel system or ignition components. The intention is for you to use your already installed performance carburetor or EFI throttle body and compatible ignition system.

S&S Cycle 99-06 BT T111 Long Block Engine - Wrinkle Black

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Specifications

Brand: S&S Cycle
Part #: 310-0770A
UPC: 310-0770A

S&S Cycle 99-06 BT T111 Long Block Engine - Wrinkle Black

Name: S&S Cycle 99-06 BT T111 Long Block Engine - Wrinkle Black
Brand: S&S Cycle
Price: 9277.49 USD
Availability: InStock

$9277.49

On Backorder — Expected to ship by May 7, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

S&S Cycle 99-06 BT T111 Long Block Engine - Wrinkle Black. Lets you reuse your existing performance carb or throttle body.

Key Features

Fits 1999-2006 Harley-Davidson Big Twin models including FLHR Road King, FXD Dyna Super Glide, and FLHTC Electra Glide Classic.
Features special head machining to accept stock-length intake manifolds, allowing reuse of existing carburetors or EFI throttle bodies.
Utilizes stock-style breathing system with compatible breather spacing for stock and most performance air cleaners.
Built with the same quality components and performance as complete S&S T-Series engines.
Wrinkle black finish for a distinct look.
Does not include fuel system or ignition components, enabling the use of your current performance parts.

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Will this fit your vehicle?

Product Details

If you're looking to significantly upgrade the heart of your 1999-2006 Harley-Davidson Big Twin, the S&S Cycle T111 Long Block Engine is a substantial step up. This isn't just an engine; it's a well-built foundation for serious performance, featuring a wrinkle black finish that looks as good as it runs. It's designed for riders who have already invested in performance upgrades like carburetors or EFI throttle bodies and want to carry that investment over to a bigger, more powerful engine.

What makes this engine a smart choice for those with existing upgrades is its clever head machining. This allows you to fit stock-length intake manifolds, meaning your current carburetor or throttle body setup will likely bolt right on. This saves you money and the hassle of sourcing new components. You get the same high-quality components and performance that S&S is known for in their complete T-Series engines, but with the flexibility to use your preferred fuel and ignition systems. It's important to note that this engine is not compatible with Harley-Davidson Softail models.

This long block engine comes ready to accept your existing breathing system, maintaining stock breather spacing and function, which is compatible with stock and most aftermarket air cleaners. While this engine offers a significant performance boost, it's not CARB approved and cannot be shipped to California. Ensure you have the necessary supporting components and expertise for installation, as this is a major engine upgrade.