S&S Cycle Camshafts — Harley-Davidson Dyna Wide Glide, Dyna Low Rider, Dyna Super Glide (1983-2020)

S&S Cycle MR103 camshaft kit for 2006 Harley-Davidson Dyna and 2007-2016 big-inch engines equipped with intake and exhaust modifications. Bolt-in replacement designed for 103 CID engines with compression ratios from 9.7:1 to 10.5:1, delivering power gains across the RPM band with peak performance between 2,500–5,500 RPM.

Features

• MR103 profile for 103 CID engines
• Works with stock or S&S CNC ported heads
• Designed for modified intake and exhaust systems
• Compression ratio range 9.7:1 to 10.5:1

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 330-0303
• Category: Engine Components / Camshafts
• Weight: 6.05 lb

Fitment

Fits 2006 Harley-Davidson Dyna and 2007–2016 big-inch engines that have aftermarket intake and exhaust modifications.

Frequently Asked Questions

Will these cams work with stock heads?

Yes — they're designed to work with unported stock heads, but deliver best results when paired with S&S CNC ported heads.

What compression ratio do I need?

These cams work with engines from 9.7:1 up to 10.5:1 compression ratio. Outside that range, consult S&S Cycle for compatibility.

Do I need intake and exhaust mods to run these?

Yes — these cams are designed for engines with aftermarket intake and exhaust modifications. Stock intake/exhaust systems may not allow full potential.

What RPM range delivers the most power?

Peak power gains occur between 2,500–5,500 RPM, with solid gains across the entire operating range.