Builder Series TT Slip-On Exhaust for Triumph Speed Twin 1200 & RS (2025+)

Fitment Verified for: Triumph Speed Twin 1200 (2025+), Triumph Speed Twin 1200 RS (2025+)

The Builder Series TT Slip-On Exhaust is a lightweight, performance-tuned exhaust designed for the Triumph Speed Twin 1200 (2025+) and Speed Twin 1200 RS (2025+). The 2025 Speed Twin is a performance-focused modern classic, and riders who choose it want an exhaust that matches that intent. Stock mufflers are quiet, heavy, and visually restrained. They do the job the factory requires, but they hold back the deep, responsive character that the 1200cc twin is capable of delivering. The Builder Series TT brings that character forward with a Double-Step Core that maintains mid-range torque and a Dimpled Baffle that shapes a deep, classic exhaust note.

Riders on the 2025 Speed Twin and Speed Twin RS are building bikes that balance sport-forward performance with modern classic style. Stock exhaust is a great starting point. The Builder Series TT adds a raw, exposed-weld aesthetic that gives the bike a garage-built identity, paired with a significant weight reduction from 8 to 10 pounds per side down to 2.4 pounds per silencer. The result is a Speed Twin that feels lighter through urban traffic and back-road corners, sounds like the engine it carries, and looks like the rider had a hand in building it.

Key Features & Benefits

• Dimpled Baffle Sound Character — A flat, thin baffle rings every time an exhaust pulse hits it — like striking a piece of sheet metal. That ringing is what gives most aftermarket slip-ons their hollow, tinny note on top of your engine's actual sound. Dimpling the baffle stiffens it and stops the ringing. What's left is the natural voice of the 1200cc twin: deep, full, and satisfying at cruising speed without being excessive for daily riding.
• Double-Step Core — Most exhaust cores are a straight tube full of holes. Exhaust flows straight through and takes backpressure with it — and without backpressure, you lose mid-range pull. The Double-Step Core steps down in diameter halfway through, slowing exhaust before it exits and keeping backpressure where the engine needs it. Mid-range torque stays intact where the Speed Twin lives: city traffic, rolling corner exits, and back-road cruising.
• Significant Weight Savings — Each silencer weighs 2.4 pounds, The Speed Twin feels noticeably lighter and more responsive through direction changes and low-speed maneuvering.
• 20-Gauge 304 Stainless Steel — Corrosion-resistant, rated for sustained heat cycling, and built to hold up under daily use. Brushed finish requires no polishing and develops character over time.
• Raw, Exposed-Weld Construction — Welds are intentionally left visible and unfinished. This is the defining look of the Builder Series: a vintage custom aesthetic with a purposeful, rider-built feel. A deliberate contrast to the polished factory appearance.
• Bolt-On Installation to Factory Headers — Fits the stock headers and OEM mounting points on both the Speed Twin 1200 and Speed Twin 1200 RS. No cutting, welding, or frame modification required. No ECU tuning needed with the factory catalytic converter in place.

What's Included

• Pair of Builder Series TT Exhaust
• Stainless Steel Exhaust Clamps
• Aluminum Spacer

Technical Specifications

• Material: 20-gauge 304 stainless steel
• Finish: Brushed stainless
• Design: Exposed weld construction with Double-Step Core and Dimpled Baffle
• Weight: 2.4 lbs per silencer (4.8 lbs per pair)
• Length: 14 inches
• Diameter: 3.75 inches
• Hardware: Stainless steel exhaust clamps and aluminum spacer included
• Fitment Verified for: Triumph Speed Twin 1200 (2025+), Triumph Speed Twin 1200 RS (2025+)

Installation Guide

• Estimated Install Time: 30 minutes
• Skill Level: Beginner. A bolt-on swap using the factory exhaust mounting interface.
• Tools Required: Socket set, Allen key set, torque wrench

Installation Steps:

• Remove the stock mufflers by loosening the exhaust clamps and detaching the OEM mounting hardware.
• Position the Builder Series TT silencers onto the stock header pipes.
• Secure each silencer with the included stainless steel exhaust clamps.
• Install the aluminum spacer and torque all fasteners to the manufacturer-recommended specification.

HOW TO INSTALL BUILDER SERIES SHORTY EXHAUST

SOUND DEMO FOR BUILDER SERIES SHORTY FOR TRIUMPH SPEED TWIN 1200 & RS (2025+)

Installation Notes: The Builder Series TT uses the same mounting interface on both the Speed Twin 1200 and Speed Twin 1200 RS (2025+). No modification to the frame, headers, or catalytic converter is required. The install is fully reversible. No ECU tuning is needed when used with the factory catalytic converter.

Warranty

• Duration: 1 year limited warranty
• Coverage: Defects in materials and workmanship under normal use
• Exclusions: Damage from improper installation, modification, or misuse

Frequently Asked Questions

Q: Does this fit both the 2025 Speed Twin 1200 and the Speed Twin 1200 RS?

A: Yes. The Builder Series TT is fitment verified for both the Speed Twin 1200 (2025+) and Speed Twin 1200 RS (2025+). Both models share the same exhaust mounting interface.

Q: Is this the same exhaust as the one for the 2019–2024 Speed Twin?

A: No. The 2025+ Speed Twin uses a different exhaust mounting configuration than the 2019–2024 model. SKU BC902.2.119-BS-BR is designed specifically for the 2025 and newer Speed Twin platform. For the 2019–2024 Speed Twin 1200, see SKU BC902.2.110-BS-BR.

Q: Will this exhaust affect my fuel mapping?

A: No ECU tuning is required when the Builder Series TT is used with the factory catalytic converter in place. The Double-Step Core maintains the backpressure characteristics that the stock fuel mapping is calibrated for.

Q: What is the difference between the Builder Series TT and the Predator Pro 2.0?

A: The Builder Series TT features exposed, unfinished welds for a raw, garage-built aesthetic. The Predator Pro 2.0 has all welds removed and finished to create a seamless, factory-custom appearance. Both use the same Double-Step Core and Dimpled Baffle internal design. The choice comes down to the look you want for your build.