S&S Cycle Camshafts for 103ci - Harley Dyna
About S&S Cycle
S&S Cycle has built American V-twin performance parts in Viola, Wisconsin since 1958 — flywheels, carburetors, cams, cylinder heads and complete crate engines. When a Harley owner talks about a 124, a 128 or a 131 build, they are usually talking about S&S. Few names carry more weight with engine builders in this space.
Elevate the performance of your Harley-Davidson Dyna 103 cubic inch engine with S&S Cycle camshafts, specifically designed for a bolt-in upgrade. These cams are optimized to deliver peak power in the 3000–6000 rpm range, transforming your riding experience. They are compatible with both stock and S&S CNC ported cylinder heads, offering versatile performance.
Why riders pick this
- Bolt-in installation for 103ci engines
- Optimized for 9.7:1 to 10.5:1 compression
- Peak power delivery from 3000–6000 rpm
- Works with stock and S&S ported heads
- Enhances engine output and responsiveness
These S&S Cycle camshafts are engineered for Harley-Davidson Dyna engines with 103 cubic inch displacement, specifically targeting bikes running compression ratios from stock 9.7:1 up to 10.5:1. This precise engineering ensures that you get the most out of your engine, with a strong, usable powerband right where you need it most for spirited riding. The bolt-in design makes for a more accessible performance upgrade.
Optimized Power Delivery
- Designed for bolt-in installation in 103 cubic inch Dyna engines
- Optimized for compression ratios ranging from 9.7:1 to 10.5:1
- Engineered to deliver peak power in the 3000–6000 rpm range
- Compatible with both stock and S&S CNC ported cylinder heads
- Provides a significant boost in engine performance
Unleash Your 103ci Dyna
Whether you're running a stock 103ci Dyna or have already upgraded to S&S CNC ported cylinder heads, these camshafts are tailored to enhance your engine's output. While they are a bolt-in solution, pairing them with an optimized air intake, performance exhaust, and a professional dyno tune will allow you to fully capitalize on their potential. Experience a more aggressive throttle response and a stronger pull through the gears.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 330-0343
- Category: Engine Components / Camshafts
- Weight: 4.1 lb
Common questions
Will these S&S Cycle cams work with stock cylinder heads?
Yes, these camshafts are designed to work well with unported stock cylinder heads. They are also optimized to truly shine when paired with S&S CNC ported cylinder heads.
What compression ratio do I need for these cams?
These cams are specifically designed for 103 cubic inch engines with compression ratios ranging from the stock 9.7:1 up to 10.5:1. Higher compression ratios may require different camshafts.
When does the power come in with these cams?
These S&S Cycle camshafts are engineered to deliver peak power in the higher RPM range, specifically between 3000–6000 rpm, for strong acceleration.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | S&S Cycle |
| TYPE | Camshafts |
| SKU | T14-663356 |
| WEIGHT | 4.1 lb |
