S&S Grand National Slip-On Exhaust for Triumph Speed 400 & Scrambler 400 X
PUBLISHED 07.11.2025
Your Triumph 400 deserves nothing less than the S&S Grand National Slip-On Exhaust. Crafted from raw brushed stainless steel and tucked tight against the bike, it delivers both stunning looks and unmistakable performance.
A removable dB reducer allows riders to fine-tune the sound and backpressure to match their personal riding style, whether that’s all-out on the track or refined on the street.
A collaboration born from performance and passion
Stockwell Design and S&S Cycle share a long-standing relationship built on a foundation of high-performance custom motorcycles and on-track success. Every one of Charlie Stockwell’s race bikes has benefited from S&S Cycle's performance exhausts and upgrades. So when Charlie teamed up with LIND to customise Triumph Motorcycles, it was only natural that his builds featured S&S Grand National Slip-Ons.
At that time, there wasn’t a factory-produced S&S exhaust for the Triumph range, so existing systems were modified to fit, sparking curiosity and excitement at S&S HQ in the U.S. The result was a collaborative project to develop a purpose-built Grand National Slip-On for the Triumph 400 models.
Fast forward to Spring 2025, and the very first production unit was hand-delivered by Martin Szlagowski of S&S Cycle to Triumph London, marking the official arrival of the Grand National Slip-On for the Speed 400, Scrambler 400 X and now, the Scrambler 400 XC.
Since then, demand has been incredible:
“There aren’t many Triumph 400s leaving Triumph London without an S&S Grand National Slip-On installed. They’ve been real popular.” - Charlie Stockwell states.
Upgrade Your Triumph 400 with S&S Cycle
Drop Charlie an email to book your free installation and purchase a new S&S Cycle Grand National Slip-On at £420 inc. VAT, and while you’re there, pick his brain for more custom ideas to make your Triumph 400 truly your own.
Track or street, the Grand National Slip-On is the ultimate upgrade for your Triumph, a product born from craftsmanship, collaboration, and a shared love of performance.
Custom-fabricated exhaust by Stockwell Design on the Baja 400 X.
Start your dream build
More ideas await in our Custom Bike Gallery, now featuring over 35 LIND x Stockwell Design builds for you to explore
Click below to reach out to Charlie and start building your dream motorcycle, and sign up to hear about new and upcoming builds from LIND x Stockwell Design.
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