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Choose the exact listed application and part number. Match the engine, model year, body, drivetrain, transmission and original exhaust arrangement in the applications and installation requirements below.
Borla axle-back exhaust system for the application and installation requirements shown below. Construction: T-304 stainless steel. Pipework uses mandrel bends. Sound specification: S-Type.
Match the exact engine, model year, drivetrain, transmission and exhaust hardware for the selected part number.
Technical specifications
| Specification | Details |
|---|---|
| Product | Axle-Back Exhaust System |
| Part numbers | 11991 |
| Pipe Diameter | 1.875" Inlet, 2.25" System |
| Tip Size | 2.25" |
| Tip Exit | Single Right Rear Exit |
| Sound | S-Type |
Vehicle applications
| Years | Model | Engine | Application | Body | Drive | Transmission | Exhaust configuration | Matching part numbers |
|---|---|---|---|---|---|---|---|---|
| 2025 | Kia K4 | 2.0L 4-cylinder petrol | EX | Sedan; 4-door | FWD | Automatic | Turn down tip on muffler assembly features a laser cut BORLA® logo; Not to mention, a drone-free driving experience for comfort during cruising speeds. Kia; K4; 2025–2025; 2.0L 4-cylinder petrol; Sedan; 4 passenger side doors; FWD; Automatic; Trims: EX; Exact supplier configuration | 11991 |
| 2025 | Kia K4 | 2.0L 4-cylinder petrol | LX | Sedan; 4-door | FWD | Automatic | Turn down tip on muffler assembly features a laser cut BORLA® logo; Not to mention, a drone-free driving experience for comfort during cruising speeds. Kia; K4; 2025–2025; 2.0L 4-cylinder petrol; Sedan; 4 passenger side doors; FWD; Automatic; Trims: LX; Exact supplier configuration | 11991 |
| 2025 | Kia K4 | 2.0L 4-cylinder petrol | LXS | Sedan; 4-door | FWD | Automatic | Turn down tip on muffler assembly features a laser cut BORLA® logo; Not to mention, a drone-free driving experience for comfort during cruising speeds. Kia; K4; 2025–2025; 2.0L 4-cylinder petrol; Sedan; 4 passenger side doors; FWD; Automatic; Trims: LXS; Exact supplier configuration | 11991 |
Available variants
| Part number | Part number |
|---|---|
| 11991 | 11991 |
Installation and care
- Turn down tip on muffler assembly features a laser cut BORLA® logo
- Not to mention, a drone-free driving experience for comfort during cruising speeds.
Follow Borla’s instructions for the selected part number before fitting.
