{"product_id":"akrapovic-racing-line-full-exhaust-system-stainless-steel-kawasaki-zx-4rr","title":"Akrapovic Racing Line Full Exhaust System Stainless Steel – Kawasaki ZX-4RR (2023–2026) S-K2R3-APC","description":"\u003cp\u003eThe Akrapovic Racing Line full exhaust system for the Kawasaki ZX-4RR (2023–2026) is an engineering-led upgrade that delivers measurable, back-to-back gains straight from the crate. Shedding 5.2 kg over the stock system and unlocking an additional 2.2 hp and 2.2 Nm of torque, this stainless steel full system is the most complete performance exhaust solution available for the ZX-4RR platform.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSignificant weight reduction of 5.2 kg — stock system weighs 9.6 kg; this system weighs just 4.4 kg\u003c\/li\u003e\n\u003cli\u003ePower gain of 2.2 hp, taking peak output from 71.4 hp to 73.6 hp at 14,600 RPM\u003c\/li\u003e\n\u003cli\u003eTorque improvement of 2.2 Nm at 7,000 RPM for stronger mid-range delivery\u003c\/li\u003e\n\u003cli\u003eRace-grade sound: 107.5 dB at 7,250 RPM without DB-killer (+12.9 dB over stock)\u003c\/li\u003e\n\u003cli\u003eDB-killer included for added versatility at noise-sensitive venues\u003c\/li\u003e\n\u003cli\u003eStainless steel headers with lambda sensor connection for ECU compatibility\u003c\/li\u003e\n\u003cli\u003eTitanium slip-on silencer shell with carbon end cap — all internal metallic components also in titanium\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eBuild Quality \u0026amp; Materials\u003c\/h2\u003e\u003cp\u003eAkrapovic have constructed the Racing Line around stainless steel headers that retain the lambda sensor port, ensuring the stock fuelling management system remains functional without additional mapping hardware on the day of fitment. The slip-on silencer takes the lightweight approach further: the outer shell, brackets and all internal metallic parts are titanium, while the end cap is finished in carbon fibre. This combination keeps the system at 4.4 kg total — a substantial saving that translates directly into improved power-to-weight and sharper steering response under braking and acceleration.\u003c\/p\u003e\u003ch2\u003ePerformance on Track\u003c\/h2\u003e\u003cp\u003eThe numbers speak plainly. Tested back to back against the standard Kawasaki system, the Racing Line delivers 73.6 hp at 14,600 RPM and an additional 2.2 Nm of torque at 7,000 RPM — gains that broaden the usable power band through the mid-range and extend the top-end rush the ZX-4RR inline-four is known for. The exhaust note rises to 107.5 dB at 7,250 RPM when the DB-killer is removed, giving the bike an unmistakable race presence in the paddock and on circuit. When regulations require a quieter note, the included DB-killer drops the output back to compliant levels without permanent modification.\u003c\/p\u003e\u003ch2\u003eEveryday Usability \u0026amp; Value\u003c\/h2\u003e\u003cp\u003eWhile the Racing Line is homologated for track and competition use only and carries no road-type approval, its real-world value is clear for any ZX-4RR owner serious about performance. The lambda sensor connection means no major wiring work on initial fitment, the DB-killer gives flexibility across different circuit noise bylaws, and the one-piece stainless-to-titanium architecture removes the maintenance headaches associated with multi-material joins. For riders who want a single, complete system that handles headers and silencer in one purchase — and delivers documented dyno results — the Racing Line represents straightforward, measurable value. Part number S-K2R3-APC.\u003c\/p\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cp\u003eThis exhaust system is designed exclusively for the following motorcycle:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eKawasaki ZX-4RR — model years 2023, 2024, 2025, 2026\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart number\u003c\/td\u003e\n\u003ctd\u003eS-K2R3-APC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem type\u003c\/td\u003e\n\u003ctd\u003eFull exhaust system (Racing Line)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeader material\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilencer shell material\u003c\/td\u003e\n\u003ctd\u003eTitanium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnd cap material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem weight\u003c\/td\u003e\n\u003ctd\u003e4.4 kg (saving 5.2 kg vs. stock 9.6 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak power (with system)\u003c\/td\u003e\n\u003ctd\u003e73.6 hp at 14,600 RPM (+2.2 hp vs. stock)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak torque gain\u003c\/td\u003e\n\u003ctd\u003e+2.2 Nm at 7,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSound level (without DB-killer)\u003c\/td\u003e\n\u003ctd\u003e107.5 dB at 7,250 RPM (+12.9 dB vs. stock 94.6 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDB-killer\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoad approval\u003c\/td\u003e\n\u003ctd\u003eNone — track and competition use only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eKawasaki ZX-4RR (2023–2026)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Akrapovic","offers":[{"title":"Default Title","offer_id":53168797188362,"sku":"S-K2R3-APC","price":1062.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/S-K2R3-APC.png?v=1780815642","url":"https:\/\/inter-pace.com\/en-bh\/products\/akrapovic-racing-line-full-exhaust-system-stainless-steel-kawasaki-zx-4rr","provider":"Inter-Pace","version":"1.0","type":"link"}