⟲ 360° — drag meThe facts.
| Brand | Akrapovic |
|---|---|
| Part number | S-A6R5-APLC |
| Fitment | Aprilia RS 660 and Tuono 660 (2021–2026) |
| System type | Racing Line, complete system |
| Materials | Carbon fibre muffler outer sleeve |
| Weight | 4.43 kg (stock 6.8 kg, saving 2.4 kg / 34.9 %) |
| Power | 98.8 PS at 10,950 rpm (stock 96.6 PS, gain 4.1 PS / 3.0 kW at 11,200 rpm) |
| Torque | 68.6 Nm (stock 67.3 Nm, gain 4.9 Nm at 4,500 rpm) |
| Installation | Approx. 90 minutes, no remapping required |
| Road approval | None — track use only |
DescriptionThe whole story▼
Read this part first: this system has no road approval. Akrapovic states it plainly — the product does not meet emission compliance requirements for street or highway use. It carries no EC and no ECE certificate, and fitting it to a registered motorcycle is the owner's legal responsibility. Everything below assumes a circuit.
Key Features
- 4.43 kg against the standard 6.8 kg: 2.4 kg and 34.9 per cent less
- 4.1 PS (3.0 kW) more at 11,200 rpm, with peak output rising to 98.8 PS
- 4.9 Nm more at 4,500 rpm — the largest single gain in the system, and it sits low
- Carbon fibre muffler outer sleeve, the racing material rather than a decorative wrap
- Complete system: headers, collector and silencer, replacing the standard exhaust path entirely
- No remapping required despite the full replacement
- No road approval — circuit use only
Where the Gain Actually Sits
The headline figure is 4.1 PS at the top, but the more interesting number is 4.9 Nm at 4,500 rpm. On a 659 cc parallel twin that is the middle of a corner exit, and it is where a rider on a track day spends far more time than at 11,200 rpm. A Racing Line that only worked at the peak would be a worse tool for the job this bike is used for.
The Check Engine Light Is Expected
On Euro 5+ machines with two lambda sensors the engine check light will come on after fitting, because the ECU detects a deviation in the stock catalytic converter's parameters. That is normal with this system and not a fault. It is also a second reason the part belongs on a track bike rather than a road one.
RS 660 and Tuono 660
The RS is the faired sportbike; the Tuono is the naked version with a wide bar and a more upright seat. The engine, the frame and the exhaust routing are shared, so one system covers both, and the Factory versions of each — which change suspension and electronics, not the exhaust path — are included.
Fitment and Compatibility
S-A6R5-APLC covers the Aprilia RS 660 and Tuono 660 from model year 2021 through 2026, including the Factory versions. Installation is quoted at 90 minutes, which reflects a complete system: the standard headers, collector and catalytic converter all come off.
Road Approval
None. This product does not meet emission compliance requirements for street or highway use, and no EC or ECE certificate exists for it. It is a circuit exhaust. If you want an Akrapovic on a registered RS 660 or Tuono 660, ask us for the type-approved slip-on instead — we will point you at the right part number.
Specifications
- Part number: S-A6R5-APLC
- EAN: 3831126449780
- Fitment: Aprilia RS 660, RS 660 Factory, Tuono 660, Tuono 660 Factory (2021–2026)
- System type: Racing Line, complete system
- Muffler outer sleeve: carbon fibre
- System weight: 4.43 kg (stock 6.8 kg, saving 2.4 kg / 34.9 %)
- Power: 98.8 PS at 10,950 rpm (stock 96.6 PS at 10,800 rpm, gain 4.1 PS / 3.0 kW at 11,200 rpm)
- Torque: 68.6 Nm (stock 67.3 Nm, gain 4.9 Nm at 4,500 rpm)
- Remapping: not required
- Note: engine check light appears on Euro 5+ machines with two lambda sensors
- Installation time: approx. 90 minutes
- Road approval: none — track use only
- Country of manufacture: Slovenia
FitmentWhich bikes this fits▼
- Aprilia RS 660 (2021–2026)
- Aprilia Tuono 660 (2021–2026)
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Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
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Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
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Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
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