Spark Exhaust Sinfonia Slip-On Pair Stainless Triumph Bonneville T100 (2005-2015) GTR0206I

Shorter and fuller than the Trumpet. The Sinfonia body swells in the middle and narrows again towards the tip, and it finishes well before the rear axle instead of reaching past it.

Key Features

• Pair of Sinfonia slip-on silencers for the Triumph Bonneville T100, 2005 to 2015.
• AISI 304 stainless steel, brushed finish.
• 3.5 kg for the pair.
• Shorter body than the Trumpet, same mounting.
• Racing part, not approved for road use.

A Cigar, Not a Trumpet

The difference between Spark's two classic shapes for this bike is where the volume sits. The Trumpet is long and even and opens at the mouth. The Sinfonia is fatter through the middle and tapers to a smaller outlet — the shape people call a cigar or a torpedo, and the one that turns up on sixties race replicas.

On a T100 the practical effect is proportion. A shorter can makes the tail of the motorcycle look shorter too, which suits a bike ridden solo with the pillion pegs off.

Where It Ends

Forward of the rear axle rather than level with it. That is worth knowing if the bike carries panniers, a rack or a top box: a shorter silencer leaves room where a long one interferes, and it also keeps the outlet away from a passenger's boot.

Brushed Stainless

AISI 304 with a brushed surface rather than polish. On a machine that already carries chrome mudguards and a chrome headlight shell, brushed stainless sits a half-step down in brightness, which stops the exhaust competing with the parts that are supposed to shine.

The black ceramic version of the same pair, if you want the opposite effect, is GTR0206B.

The Sound of a Shorter Can

Length and packing volume are what a silencer works with, and the Sinfonia has less of both than the Trumpet. As a rule that gives a harder, more immediate note rather than a deeper one — the difference between a bark and a rumble.

Neither is quieter in any meaningful sense; both are racing silencers on a bike that left the factory heavily muffled. If sound is the reason you are here, the shape decides the character rather than the volume.

Sold as a Pair

A Bonneville has two silencers and Spark sells them as a pair. Replacing one and leaving the other standard would work mechanically and would look and sound wrong from the first metre, so the article covers both sides.

Installation

Slip-on level: the standard silencers come off and Spark's go on in their place, with the header pipes untouched. On a T100 that is a bolt-on afternoon rather than a workshop job.

Fitment & Compatibility

Triumph Bonneville T100, 2005 to 2015. The Black Series version of this pair is GTR0206B. The longer Trumpet shape is GTR0205I and GTR0205B, and the Megaphone is GTR0207I and GTR0207D.

Road Approval

None. Spark lists this article as not approved, and a Bonneville is a road bike far more often than a track one. Worth settling before you order.

Specifications

• Part number: GTR0206I
• Type: Slip-on, pair
• Design: Sinfonia
• Material: AISI 304 stainless steel, brushed finish
• Weight: 3.5 kg
• Road approval: none, track use
• Fitment: Triumph Bonneville T100 (2005-2015)
• Manufacturer: Spark Exhaust Technology, Mantova, Italy