Triumph 955i SPRINT ST 99 – 2005

The triumph sprint st remains one of Triumph’s most celebrated sport-touring motorcycles, combining exhilarating performance with long-distance comfort. If you own a Triumph 955i Sprint ST manufactured between 1999 and 2005, upgrading to a Quill Performance Exhaust system will transform your riding experience, delivering enhanced sound, improved performance, and a weight reduction that makes every mile more enjoyable.

About the Triumph Sprint ST Performance Exhaust System

This premium aftermarket exhaust system has been specifically engineered for the Triumph 955i Sprint ST covering model years 1999 through 2005. Designed and manufactured in the UK, this exhaust represents the perfect balance between quality craftsmanship and performance enhancement. Each system is precision-built using CNC mandrel-bent stainless steel tubing, ensuring optimal exhaust flow and durability that will last for years to come.

The complete kit includes everything required for a straightforward installation: one stainless 304 CNC mandrel-bent link pipe, one stainless exhaust strap, and one exhaust strap rubber. The system is designed to fit directly to your standard OEM downpipes, meaning no complicated modifications or additional parts are necessary. This bolt-on compatibility makes the upgrade accessible to both professional mechanics and home enthusiasts with basic mechanical knowledge.

Why Upgrade Your Triumph Sprint ST Exhaust?

The factory exhaust system on the triumph sprint st was designed with stringent noise regulations and cost considerations in mind. While functional, the standard system is typically heavy, restrictive, and produces a muted sound that doesn’t reflect the character of the powerful 955cc three-cylinder engine. By upgrading to a Quill Performance Exhaust, you’ll unlock several significant benefits that enhance both the performance and enjoyment of your motorcycle.

Firstly, the weight reduction is immediately noticeable. Stainless steel construction paired with efficient design means you’re removing unnecessary kilograms from the rear of the bike, improving handling characteristics and making the Sprint ST feel more agile through corners. This is particularly beneficial for sport-touring riders who enjoy spirited rides on twisty roads.

Secondly, the mandrel-bent construction ensures smooth, unrestricted exhaust flow. Unlike crush-bent tubes which create internal ridges and restrictions, mandrel bending maintains a consistent internal diameter throughout every curve. This translates to improved exhaust gas velocity, better engine breathing, and measurable gains in both horsepower and torque across the rev range.

Sound Quality That Enhances the Triumph Sprint ST Experience

One of the most immediately satisfying aspects of fitting a Quill exhaust to your triumph sprint st is the transformation in sound. The distinctive three-cylinder note of the 955i engine truly comes alive, producing a deep, purposeful growl that turns heads without being antisocially loud. The exhaust note is carefully tuned to provide an exciting soundtrack during spirited riding whilst remaining civilised enough for early morning starts and residential areas.

You can hear the difference for yourself by watching our demonstration video, which showcases the exhaust note at idle, during acceleration, and at various engine speeds. The sound is characteristically British—refined yet purposeful, aggressive when you want it to be, but never crude or excessively loud.

Premium Materials and British Manufacturing Excellence

Every Quill Performance Exhaust system is manufactured from high-grade 304 stainless steel, chosen specifically for its excellent corrosion resistance and longevity. This marine-grade material withstands the rigours of British weather, including salt spray, rain, and temperature extremes, ensuring your investment continues to look and perform brilliantly for years to come.

The CNC mandrel bending process represents the gold standard in exhaust fabrication. Computer-controlled machinery ensures every bend is identical, maintaining structural integrity and precise tolerances that guarantee perfect fitment every time. The quality of welding and finishing reflects decades of exhaust manufacturing expertise, with each seam carefully inspected to meet our exacting standards.

Straightforward Installation for the Triumph Sprint ST Owner

Installation of this exhaust system is remarkably straightforward, particularly when compared to full system replacements. Because the Quill exhaust is designed to mate directly with your existing OEM downpipes, you’re only replacing the rear section of the exhaust system. This significantly reduces installation time and complexity.

The included stainless exhaust strap and rubber mount ensure secure, vibration-free mounting that prevents unnecessary stress on welds and joints. Most owners with basic mechanical aptitude and a standard toolkit can complete the installation in under an hour. For those less confident with spanners, any competent motorcycle mechanic will find the installation quick and hassle-free.

Similar upgrades are available across our extensive Triumph range, including systems for the Triumph Speed Triple 955i 2000 – 2004, which shares the same legendary three-cylinder powerplant, and the Triumph Tiger 1200 Explorer for adventure touring enthusiasts.

Performance Benefits You’ll Actually Notice

Whilst dramatic horsepower claims are common in the aftermarket exhaust industry, Quill focuses on delivering real-world improvements that enhance your riding experience. Owners of the triumph sprint st typically report smoother power delivery, particularly in the mid-range where sport-touring riders spend most of their time. The engine feels more responsive to throttle inputs, making overtaking manoeuvres more confident and enjoyable.

The improved exhaust flow also contributes to slightly better fuel efficiency during steady-state cruising, though this benefit may be offset if you find yourself enjoying the enhanced performance and sound a little too much! Engine temperatures can also see marginal improvements due to more efficient exhaust gas extraction.

For riders interested in further performance modifications, a quality exhaust system forms an excellent foundation. Combined with appropriate fuel mapping adjustments and intake modifications, the performance potential of the 955i engine can be significantly enhanced. For technical guidance on tuning triple-cylinder engines, Motorcycle.com offers comprehensive resources and expert advice.

Frequently Asked Questions

Will this exhaust fit all Triumph Sprint ST 955i models?
This exhaust system is specifically designed for Triumph 955i Sprint ST motorcycles manufactured between 1999 and 2005. It will not fit the later 1050 Sprint ST models which have different exhaust routing.

Do I need to remap my ECU after fitting this exhaust?
Whilst not strictly necessary, a professional remap or fuelling adjustment can optimise performance and ensure the engine runs perfectly with the improved exhaust flow. Many riders report excellent results without remapping, but extracting maximum performance benefits may require tuning.

Is the exhaust excessively loud?
No, the Quill exhaust is designed to enhance the natural character of the three-cylinder engine without creating antisocial noise levels. It produces a purposeful, sporting note that’s louder than standard but remains suitable for everyday use and complies with reasonable noise expectations.

What warranty is provided?
All Quill Performance Exhausts are covered by our comprehensive manufacturing warranty, protecting against defects in materials and workmanship. The high-grade stainless steel construction ensures longevity that typically exceeds the warranty period significantly.

Upgrading your Triumph 955i Sprint ST with a Quill Performance Exhaust represents one of the most cost-effective and satisfying modifications you can make. The combination of weight savings, performance improvements, enhanced sound, and premium construction quality delivers tangible benefits every time you ride. Transform your Sprint ST today and experience the difference that proper British engineering makes.