SC PROJECT S1 Titanium Slip On Exhaust For KTM DUKE 790 (2018-20)

SC PROJECT S1 Titanium Slip On Exhaust For KTM DUKE 790 (2018-20)

The KTM Duke 790—aptly nicknamed “The Scalpel”—quickly earned a reputation sc-project-s1-sl…duke-790-2018-20/ as one of the top middleweight naked bikes. With its aggressive design, agile handling, and responsive LC8c parallel-twin engine, it’s a true rider’s machine. But even a bike this capable can go further with the right performance upgrade. That’s where the SC Project S1 Titanium Slip-On Exhaust comes in.

More than just an aftermarket add-on, the S1 is a race-inspired system that brings raw performance to everyday riding. It improves sound, sheds weight, and boosts response—all while elevating the Duke’s bold personality.

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Pure Racing Pedigree

SC Project is a global name in racing, known for its MotoGP, Moto2, and WorldSBK exhaust systems. The S1 slip-on shares that racing DNA. Crafted in Italy from premium titanium, it’s built with performance-first engineering in mind.

Its conical body design takes cues from full race systems. This unique shape helps reduce backpressure, improves sound resonance, and keeps the overall size compact. The matte titanium finish develops a striking blue-purple gradient from heat, adding a custom, high-performance look over time.

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Performance Gains You Can Feel

Adding the SC Project S1 to your KTM Duke 790 provides immediate benefits. You’ll notice sharper throttle response and stronger mid-range torque. The stock exhaust is solid but restricted by regulations. The S1 frees up flow and lets the engine breathe the way it was meant to.

Riders often report quicker acceleration and more responsive power delivery, especially between 4,000 and 8,000 RPM. Even without ECU tuning, the Duke feels more energetic and alive. Pairing it with a performance air filter or ECU flash takes things even further. Still, this slip-on alone offers impressive gains without the need for deeper modifications.

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A Soundtrack That Matches the Performance

One of the most exciting transformations is the sound. The stock system keeps things muted. The S1 changes that completely.

At idle, you’ll hear a deep, throaty rumble. Roll on the throttle and it delivers an aggressive growl with a crisp, raspy top end. On deceleration, the pipe crackles and pops like a true racebike. It gives your Duke a powerful voice that matches its fierce performance.

Be aware, though—it’s loud. Especially without the optional dB killer. It’s perfect for spirited rides and track days, but may be too much for quiet neighborhoods or sound-restricted areas.

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Build Quality and Installation

As with all SC Project products, the S1’s build quality is exceptional. The TIG welds are clean and precise. The titanium shell is ultra-light yet durable. CNC-machined mounting hardware ensures a perfect fit.

Installation is simple and user-friendly. As a slip-on system, it bolts onto the existing mid-pipe using standard tools. No cutting or custom fitting is required. Most riders can install it in under an hour. Once mounted, the exhaust hugs the body for a clean look and helps improve the bike’s center of gravity.

The high-mounted design also reduces the chance of damage if the bike tips over.

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Weight Savings That Matter

One of the biggest advantages of the S1 is weight reduction. The stock exhaust is heavy, thanks to its large muffler and internal baffling. The titanium S1 is much lighter—dropping several kilograms off the bike.

Less weight means better acceleration, quicker braking, and sharper handling. The Duke 790 already excels in agility, but this upgrade amplifies that trait. Riders immediately notice the difference in how the bike reacts to inputs.

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Street Legality and Compliance

Like many high-performance systems, the SC Project S1 is designed with racing and track use in mind. It doesn’t include a catalytic converter, and the sound levels may exceed legal limits in some areas.

Always check your local regulations before installing this exhaust on a road-going motorcycle. SC Project does offer optional dB killers and, in some cases, homologated versions that help with compliance. These options maintain performance while making the system more road-friendly.

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Final Verdict

The SC Project S1 Titanium Slip-On Exhaust is a premium upgrade that brings out the best in the KTM Duke 790 (2018–2020). It increases performance, reduces weight, enhances sound, and adds a high-end racing look that perfectly matches the Duke’s sharp styling.

Yes, it’s an investment—but one that delivers real results. It’s built with MotoGP-level precision and turns every ride into something more thrilling.

Whether you’re ripping through twisty backroads, hitting the track, or simply want more excitement on your daily commute, the S1 delivers. It gives your Duke 790 the aggressive tone, responsiveness, and visual flair it truly deserves.

Weight	8 kg
Dimensions	66 × 25 × 22 cm