Stainless Header – TRIUMPH Speed Twin 1200 / Thruxton

• 🚀 Unlocked performance 

• 🔊 Deeper, more characterful sound 

• 🧰 Plug & play install on stock mounting points 

• 💎 304 stainless and premium TIG welds 

• 🔁 Two versions by model year 

Double-weld stainless front header – TRIUMPH Speed Twin 1200 / Thruxton

Optimized flow, stronger torque, freer sound, and refined finish for your twin

Unlock your engine’s potential with this stainless-steel front header designed for the Speed Twin 1200 and Thruxton 1200. Its high-flow straight-through design drastically cuts stock restrictions to help the twin breathe better, delivering improved cylinder filling, crisper revs, and a clearly enhanced ride feel.

Machined from thick, durable 304 stainless, this header features precise, consistent TIG welds. Smoothed internal sections help maintain high gas velocity, while carefully shaped bends reduce turbulence. The result: snappier throttle response, stronger low-end torque, and a deeper sound—sporty without being harsh. Provisions for lambda sensors are included to retain all original functions.

Two variants are offered to match your bike exactly: Version 1 for the Speed Twin 1200 up to model year 2025 and Thruxton 1200; Version 2 for the Speed Twin 1200 from model year 2026 onward. Simply choose the version for your model year for a hassle-free install and perfect alignment with the rest of the system.

Compatibility:

• Speed Twin 1200 (up to 2025) – Version 1

• Thruxton 1200 – Version 1

• Speed Twin 1200 (from 2026) – Version 2

Technical specifications:

• 🛠 Type: high-flow “straight-through” 2-into-2 front header, reduced-restriction section

• 📏 Dimensions: approx. inlet diameter 45 mm, joints ~48 mm, tube thickness ~1.2 mm

• 💪 Material: 304 stainless steel, corrosion- and heat-resistant

• 🧵 Welding: TIG process with double reinforcement bead for increased reliability

• 🌡 Thermal management: optimized routing to limit heat buildup and improve gas evacuation

• 🧪 Lambda sensors: pre-equipped to retain original electronic management

• 🎨 Finish: brushed stainless look with quality visible welds

• ⚖️ Indicative weight: approx. 2.8 kg (varies by version)

• ⚠️ Note: dedicated to performance optimization; approval may vary by local regulations

Advantages over stock:

✔ Reduced pressure losses for superior exhaust gas flow
✔ Quicker engine response and stronger midrange torque
✔ Deeper, sportier tone while remaining controlled
✔ Durable 304 stainless, resistant to corrosion and high temperatures
✔ Precision TIG welding for maximum longevity
✔ Lambda sensor integration for perfect electronic compatibility
✔ Precise fitment on stock mounting points
✔ Two variants for exact fitment by Speed Twin model year

Why upgrade the stock part?

OEM headers are often designed to prioritize comfort and compliance, which can mean internal restrictions, higher weight, and a muted tone. In use, this can dull engine responsiveness and stifle the twin’s character.

• Flow loss due to baffles and narrowed sections

• Higher heat buildup beneath the engine

• Overly discreet sound with limited presence

• Greater inertia from a heavier construction

This performance header addresses those limits: the high-flow internal path and 304 stainless improve breathing, reduce concentrated heat, and unleash a more authentic sound signature while keeping OEM-style integration and sensor compatibility.

Ideal use:

• Muscular roadster setup on Speed Twin 1200 for more torque and character

• Café racer project based on Thruxton 1200 seeking a pure look and crafted soundtrack

• Performance optimization with suitable mapping while retaining lambda sensors

• Track or track-day use requiring better gas evacuation

• Daily riders wanting sharper response without sacrificing reliability

Choosing the version: select Version 1 if your bike is a Speed Twin 1200 (up to 2025) or a Thruxton 1200; choose Version 2 if your Speed Twin 1200 is from model year 2026 onward. If in doubt, check your bike’s model year before ordering.