What engine sizes does this camshaft fit?

This camshaft is designed for 74" and 80" Harley-Davidson Big Twin engines manufactured between 1978 and 1984. It is a direct reproduction of the stock H-Grind camshaft for these specific engine sizes and years.

Does this camshaft come with installation hardware?

The manufacturer's description does not specify if installation hardware is included. It is recommended to refer to the manufacturer's installation instructions or consult with a technician to determine if any additional hardware is needed for your specific application.

Can this camshaft be used on any Big Twin engine from 1978-1984?

This camshaft is available for different engine configurations, including generator engines with inner cam bushings or bearings, and early and late alternator engines with varying cam gear pitch diameters. It's important to select the correct version based on your engine's specific setup.

Specifications

Brand: S&S Cycle
Part #: 330-0166
UPC: 330-0166

S&S Cycle 78-84 BT H-Grind Camshaft

Name: S&S Cycle 78-84 BT H-Grind Camshaft
Brand: S&S Cycle
SKU: s-s-cycle-s-s-cycle-78-84-bt-h-grind-camshaft-t14-663388
Price: 255.95 USD
Availability: BackOrder

$255.95

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 H-Grind Camshaft for 1978-1984 Big Twin engines. A direct reproduction of stock cams for restoration.

Key Features

Fits 1978-1984 Harley-Davidson Big Twin engines.
Direct reproduction of the stock H-Grind camshaft for the specified Big Twin models.
Designed for repair and restoration of 74" and 80" engines.
Available for generator engines with inner cam bushings or bearings, and for early and late alternator engines.
Features hydraulic lifters and does not require special bolt-in springs.
Front and rear cylinders have unique timing specifications for proper engine operation.

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About this part

Product Details

If you're working on a 1978 to 1984 Harley-Davidson Big Twin engine, especially a 74" or 80" model, and need to restore it to its original performance, this S&S Cycle H-Grind Camshaft is what you're looking for. It's a direct reproduction of the stock camshafts used during those years, making it perfect for repair and restoration projects. This camshaft is designed to fit a range of Big Twin models, including popular bikes like the Harley-Davidson FXWG Wide Glide, FLHS Electra Glide Sport, and FXRS Low Glide.

This camshaft is built to the original specifications, ensuring it works seamlessly with your engine's existing components. It's available for both generator and alternator engines, with options to accommodate different cam gear pitch diameters for early and late alternator setups. The H-Grind features hydraulic lifters and requires no special bolt-in springs, simplifying installation. You'll find that the front and rear cylinders have unique timing specs, which is typical for these engines and contributes to their characteristic power delivery.

When rebuilding or repairing your Big Twin, using a camshaft that matches the original factory specs is key to achieving the correct performance and feel. This S&S Cycle camshaft offers that authenticity, allowing you to bring your classic Harley back to its intended glory.