What does 'Size Code 398' mean for this throttle body?

The 'Size Code 398' refers to the specific internal bore diameter of the throttle body. This measurement is chosen by S&S Cycle to optimize airflow for the intended 2002-2005 Big Twin engine applications, aiming for a balance of performance and drivability.

Does this throttle body kit come with all necessary installation hardware?

This kit is designed as a comprehensive upgrade. While it includes the throttle body itself, it's always recommended to consult the manufacturer's installation guide to confirm all included components and any additional hardware or gaskets that may be needed for your specific motorcycle model.

Can this throttle body be shipped to California?

No, this throttle body kit is not CARB approved and therefore cannot be shipped to California due to emissions regulations.

S&S Cycle Throttle Body Kit 170-0339 - 2002-2005 Big Twin

Name: S&S Cycle 02-05 BT Size Code 398 Cable Operated Throttle Body Kit
Brand: S&S Cycle
SKU: s-s-cycle-s-s-cycle-02-05-bt-size-code-398-cable-operated-throttle-body-kit-t14-661521
Price: 995.95 USD
Availability: BackOrder

S&S Cycle 02-05 BT Size Code 398 Cable Operated Throttle Body Kit

$995.95

On Backorder

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

S&S Cycle 02-05 Big Twin Size Code 398 Cable Operated Throttle Body Kit. Improves airflow for better engine performance.

Key Features

Fits 2002-2005 Harley-Davidson Big Twin models.
Features a Size Code 398 bore for optimized airflow.
Cable operated for a direct rider connection.
Designed to improve engine performance and throttle response.
From S&S Cycle, a well-known name in V-twin performance.

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Will this fit your vehicle?

Product Details

This S&S Cycle throttle body kit is built around a Size Code 398 bore, which is a specific measurement that matters for how much air your engine can take in. It’s designed for 2002-2005 Big Twin Harley-Davidson models and operates with a cable, giving you that direct connection between your hand and the engine. When you're looking to get more out of your engine, improving the airflow is a key step, and a well-built throttle body like this one is central to that process.

S&S Cycle has a long history with performance V-twin engines, and this kit reflects that experience. It's a complete package intended to make the upgrade straightforward for mechanics and experienced riders. The specific bore size is chosen to work well with the airflow characteristics of these Big Twin engines, aiming for an improved throttle response and overall power delivery without being so large that it compromises low-end torque. This is a significant upgrade for anyone looking to tune their engine for better performance.

This kit is designed to fit a wide range of Harley-Davidson Big Twin models from 2002 to 2005, including popular bikes like the Road King, Electra Glide, Softail models, and Dyna Super Glides. While it's a substantial performance improvement, please note that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for the most accurate guidance on fitting this throttle body to your specific motorcycle.