Spark Exhaust Megaphone Slip-On Pair Stainless Triumph Bonneville T100 (2005-2015) GTR0207I

The boldest of the three shapes Spark builds for the T100. A megaphone does not taper towards the outlet — it opens out, widening all the way to a large mouth, and it is the silhouette that says racing before anything else about the motorcycle does.

Key Features

• Pair of Megaphone slip-on silencers for the Triumph Bonneville T100, 2005 to 2015.
• AISI 304 stainless steel.
• 3.5 kg for the pair.
• Header pipes stay standard.
• Racing part, not approved for road use.

Why a Megaphone Looks Like That

The shape is not a stylist's invention. Open megaphones were what racing four-strokes ran before absorption silencers existed, sized so the expanding cone helped scavenge the cylinder rather than to quieten anything. Spark's version is a silencer built in that outline rather than a true open megaphone, but the proportions are the same.

On a Bonneville the effect is immediate. Where the Trumpet and the Sinfonia let the bike stay a road motorcycle, a pair of megaphones turns it into something that looks like it belongs at Goodwood.

The Widest of the Three

Worth thinking about physically as well as visually. The mouth is larger than on either of the other shapes, so the can sits closer to the rider's boot and closer to a pillion's. On a bike used two-up, the Sinfonia is the more considerate choice.

A Note on the Photograph

Spark publishes one image for this article number and it shows the dark version, GTR0207D. We have not attached it to this listing, because a photograph of a black silencer on a page selling a stainless one is the kind of thing that only becomes clear when the parcel is open.

If you would like to see the brushed pair before ordering, ask us and we will get a picture from Spark.

What You Are Buying

AISI 304 stainless, supplied as a pair, mounting on the standard header pipes. The dark version of the same shape is GTR0207D at 928 euro — seventy-two euro more, and the one Spark photographs.

Sound, Honestly

Spark publishes no decibel figure for any of the T100 slip-ons, and we are not going to invent one. What can be said is structural: these are racing silencers replacing heavily baffled factory cans on an 865 cc parallel twin, and the difference is not subtle in any of the three shapes.

Of the three, a megaphone has the least restrictive outlet. Draw your own conclusion, and if your riding is mostly through villages at seven in the morning, draw it carefully.

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 dark version of this pair is GTR0207D. The two quieter-looking shapes are the Trumpet, GTR0205I and GTR0205B, and the Sinfonia, GTR0206I and GTR0206B.

Road Approval

None. Spark lists this article as not approved, and of the three shapes this is the one least likely to go unremarked at a roadside check.

Specifications

• Part number: GTR0207I
• Type: Slip-on, pair
• Design: Megaphone
• Material: AISI 304 stainless steel
• Weight: 3.5 kg
• Road approval: none, track use
• Fitment: Triumph Bonneville T100 (2005-2015)
• Manufacturer: Spark Exhaust Technology, Mantova, Italy