What kind of engine modifications are best suited for this camshaft kit?

This S&S Cycle MR103C camshaft kit is recommended for modified engines that already feature larger displacement and higher compression ratios. It's designed to complement these existing upgrades and deliver more power.

What other components are recommended when installing this camshaft kit?

For optimal performance and reliability with chain drive cams, an S&S oil pump and cam support plate are highly recommended. Upgrading to a 2007-and-later style hydraulic cam chain tensioner is also advised.

Can I use my stock valve springs with this camshaft kit?

For 2005-2006 Harley-Davidson engines, stock valve springs may be usable with the MR103C and HP103 cams. It's always a good idea to verify compatibility or consult with a professional for your specific application.

Specifications

Brand: S&S Cycle
Part #: 330-0470
UPC: 330-0470

S&S Cycle 07-17 BT MR103C Chain Drive Camshaft Kit

Name: S&S Cycle 07-17 BT MR103C Chain Drive Camshaft Kit
Brand: S&S Cycle
SKU: s-s-cycle-s-s-cycle-07-17-bt-mr103c-chain-drive-camshaft-kit-t14-663321
Price: 399.95 USD
Availability: BackOrder

$399.95

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 07-17 BT MR103C Chain Drive Camshaft Kit for modified engines.

Key Features

Chain drive camshaft kit for modified Harley-Davidson Big Twins (2006 Dyna, 2007-2016 Big Twins).
Recommended for modified engines with larger displacement and higher compression.
Delivers more torque and horsepower compared to standard bolt-in cams.
Stock valve springs from 2005-2006 engines may be compatible.
Performance intake and exhaust are recommended for maximum gains.

This camshaft kit is designed for 2006 Harley-Davidson Dyna models and 2007-2016 Harley-Davidson Big Twin models. It is not CARB approved and cannot be shipped to California.

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About this part

Product Details

If you're looking to get more out of a modified Harley-Davidson Big Twin engine, this S&S Cycle MR103C chain drive camshaft kit is a solid option. It's designed to give you more torque and horsepower than typical bolt-in cams, especially when you've already increased displacement or compression. This kit is recommended for those modified engines where you're aiming for a noticeable performance bump.

The MR103C camshaft is built for performance, offering a step up from stock cams. For 2005-2006 engines, you can often reuse the stock valve springs with this kit. To really make the most of these cams and ensure proper operation, especially in chain drive setups, an S&S oil pump and cam support plate are highly recommended. Also, upgrading to a 2007-and-later style hydraulic cam chain tensioner is a good idea when installing chain drive cams.

Keep in mind that for maximum performance gains, pairing these cams with performance intake and exhaust components is advised. This kit is not CARB approved and cannot be shipped to California.