Spark Exhaust Grid-O Racing Full System with 3-into-1 Pipe Triumph Trident 660 / Tiger Sport 660 / Daytona 660 (2021-2026) GTR8820T

The catalyst replaced by a racing 3-into-1, and the Moto2 world champion silencer behind it. Spark's racing Trident system is the lightest it builds for this motorcycle, and the only one where nothing in the exhaust path is there for a regulator.

Key Features

• Racing full system for the Triumph Trident 660, Tiger Sport 660 and Daytona 660, 2021 to 2026.
• 4.8 kg against 8.1 kg standard — 3.3 kg saved.
• Racing 3-into-1 pipe in place of the catalytic converter.
• Grid-O silencer: full titanium, visible TIG welding, titanium grid.
• AISI 304 stainless collector and pre-silencer box.
• Around seventy euros below the homologated version.

What a Racing 3-into-1 Replaces

In the homologated GTR8820TOM the section between the collector and the box holds a racing catalytic converter. Here it holds nothing but pipe — a 3-into-1 junction dimensioned for flow rather than for conversion.

That is a smaller change than deleting the box entirely and a larger one than it sounds. The catalyst is the single most restrictive component in any road exhaust, and its substrate is also where a fair amount of the standard system's weight lives.

Still the Lightest of Three

Spark quotes 4.8 kg for this system, against 4.9 kg for the 60's racing version and 5.0 kg for the homologated Moto GP one. The Grid-O is the lightest silencer in the Trident programme, and the racing pipe saves what a converter would add.

On a 660 those tenths matter more than they would on a litre bike. Three point three kilos is a real proportion of what a Trident weighs, and all of it comes off behind the rider.

The Box Stays

Removing the catalyst does not make this a straight-through exhaust. Spark keeps the pre-silencer box, and it is what gives the system the dark, enveloping note the company describes rather than a raw one.

For a track bike that is more useful than it looks. A system with a real expansion chamber ahead of the silencer measures lower at a sound check than one without — and a Grid-O without a box in front of it would be a very loud motorcycle.

A Championship Silencer, Unaltered

The Grid-O is full titanium with its TIG welds left unground and a titanium grid at the outlet. It won the 2020 Moto2 world championship on the engine family this motorcycle uses a smaller version of.

Spark does not soften it for the road versions and does not change it here. What differs between the homologated and racing systems is entirely upstream of the silencer.

Fitment & Compatibility

Triumph Trident 660, Tiger Sport 660 and Daytona 660, 2021 through 2026. The homologated version, with the racing catalytic converter, is GTR8820TOM. The 60's racing system is GTR8819I; with black ceramic treatment, GTR8819B.

Road Approval

None. The system has no catalytic converter and no certificate. Closed circuits only.

Specifications

• Part number: GTR8820T
• Type: Full racing system
• Silencer: Grid-O, full titanium with titanium grid
• Mid-section: racing 3-into-1 pipe, no catalyst
• Collector and box: AISI 304 stainless steel
• Spark weight: 4.8 kg
• Standard weight: 8.1 kg
• Weight saving: 3.3 kg
• Fitment: Triumph Trident 660 / Tiger Sport 660 / Daytona 660 (2021-2026)
• Road approval: None — racing use only
• Manufacturer: Spark Exhaust Technology, Mantova, Italy