⟲ 360° — drag meThe facts.
| Brand | K&N |
|---|---|
| Part Number | KN-138 |
| Filter Type | Racing oil filter |
| Hex Size | 17 mm |
| Safety Wire Port | Yes — drilled through hex |
| Canister Wall Thickness | 50% thicker than standard |
| Anti-Drain-Back Valve | Yes |
| Overpressure Relief Valve | Yes |
| Fitment | Suzuki GSX-R 600 / GSX-R 750 (2003–2017) |
DescriptionThe whole story▼
Built for the rigours of competitive racing, the K&N KN-138 Racing Oil Filter delivers certified track-ready protection for Suzuki GSX-R 600 and GSX-R 750 models spanning 2003 to 2017. Its safety wire-drilled 17 mm hex body meets scrutineering requirements straight out of the box, while a 50% thicker steel canister ensures the filter will never burst under the extreme pressures of hard circuit use.
Key Features
- Safety wire port integrated into the 17 mm hex: satisfies track scrutineering requirements without modification, keeping you on the grid and not in the pits.
- No specialist tools required: the oversized hex accepts standard hand tools for fast, confident filter changes between sessions.
- Pre-installed O-ring accelerates fitment and ensures a leak-free seal every time.
- Anti-drain-back valve prevents oil from draining out of the filter at shutdown, eliminating dry starts and protecting bearings on every cold start.
- New overpressure relief valve maintains consistent oil pressure and prevents pressure spikes from starving or flooding critical engine components.
- Reinforced canister walls — 50% thicker than standard — combined with a heavy-duty base plate provide structural integrity under sustained racing loads.
- High flow rate with excellent filtration efficiency removes contaminants and soot without restricting oil supply, supporting peak engine output throughout a race.
- Fully compatible with the latest fully synthetic racing oils and race fuels.
Purpose-Built Racing Construction
K&N engineered the KN-138 specifically for applications where a standard road filter is simply not enough. The thickened steel shell resists deformation under sustained high-RPM oil pressure, while the reinforced base plate prevents distortion during removal — a real-world concern when torque is applied quickly in the paddock. The anti-drain-back valve means that when you restart between qualifying and the race, your engine receives pressurised oil within fractions of a second rather than running momentarily dry.
Safety Wire Ready
Many circuits mandate safety-wired oil filters as a condition of entry. The KN-138's dedicated safety wire hole through the 17 mm hex allows a wire to be threaded and twisted in the standard manner, satisfying technical regulations without any drilling or modification. This single feature alone makes the KN-138 the correct choice over an equivalent road filter for any serious track day or race entry.
Fitment & Compatibility
The K&N KN-138 Racing Oil Filter fits the following Suzuki models:
- Suzuki GSX-R 600 — 2003 to 2017
- Suzuki GSX-R 750 — 2003 to 2017
Specifications
| Brand | K&N |
|---|---|
| Part Number | KN-138 |
| Type | Racing oil filter |
| Hex Size | 17 mm |
| Safety Wire Port | Yes — drilled through hex |
| Canister Wall Thickness | 50% thicker than standard |
| Anti-Drain-Back Valve | Yes |
| Overpressure Relief Valve | Yes |
| Oil Compatibility | All modern fully synthetic oils and race fuels |
| Fitment | Suzuki GSX-R 600 / GSX-R 750 (2003–2017) |
FitmentWhich bikes this fits▼
- Suzuki GSX-R 600/750 (2003–2017)
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