What is the recommended compression ratio for this camshaft kit?

This S&S Cycle 570C camshaft kit is designed for engines with a compression ratio between 9:1 and 9:9. It is not recommended for compression ratios of 10:1 or greater.

Do I need to replace my valve springs when installing these cams?

For 2005-2006 models, you can often use your stock valve springs. However, cams with higher lift than stock generally require special high-lift springs, and S&S recommends checking your specific application.

What other parts are recommended for optimal performance with this camshaft kit?

To get the best performance from this camshaft installation, S&S Cycle recommends a high-flow intake and exhaust system. Adjustable pushrods are also recommended due to the high lift of these cams.

S&S Cycle 570C Chain Drive Camshaft Kit 330-0003

Name: S&S Cycle 99-06 BT 570C Chain Drive Camshaft Kit
Brand: S&S Cycle
SKU: s-s-cycle-s-s-cycle-99-06-bt-570c-chain-drive-camshaft-kit-t14-619378
Price: 418.95 USD
Availability: BackOrder

S&S Cycle 99-06 BT 570C Chain Drive Camshaft Kit

$418.95

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 99-06 BT 570C Chain Drive Camshaft Kit. Boosts low-end and midrange torque for a wide range of Harley-Davidson Big Twin models.

Key Features

Fits 1999-2006 Harley-Davidson Big Twin models.
Greatly improves low-end and midrange torque, strongest from idle-4000rpm.
Designed for engines with 96 to 106 CID and 9:1 to 9:9 compression.
Valve lift is 0.570" for both intake and exhaust.
Duration at 0.053" is 240º for intake and 255º for exhaust.
Quick installation allows reuse of many stock components.

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Will this fit your vehicle?

Product Details

If you're looking to get more grunt out of your 99-06 Big Twin Harley-Davidson, this S&S Cycle 570C Chain Drive Camshaft Kit is a solid option. This kit is designed to significantly improve low-end and midrange torque, making your ride feel stronger from idle up to around 4000 RPM. It's a popular choice for engines in the 96 to 106 cubic inch range with a compression ratio between 9:1 and 9:9, and it's not recommended for higher compression setups.

The 570C cams feature a valve lift of 0.570 inches on both the intake and exhaust, with a duration of 240 degrees at 0.053 for the intake and 255 degrees for the exhaust. This design takes advantage of the extra flow you might get from ported stock heads or S&S Super Stock heads. Because of the high lift, S&S recommends using their adjustable pushrods for installation, and for the best overall performance gains, consider pairing this kit with a high-flow intake and exhaust system. For 2005-2006 models, you can often reuse your stock valve springs.

This kit offers a noticeable performance increase at an affordable price point and is designed for a relatively quick installation, allowing you to reuse many of your existing stock components. It's a great way to wake up the power of your Harley-Davidson without needing a full engine rebuild.