{"product_id":"spark-exhaust-force-evo-400-mm-98-db-idm-system-kawasaki-zx-4rr","title":"Spark Exhaust Force Evo 400 mm 98 dB IDM Racing System Kawasaki ZX-4RR (2023-2026) GKA8855T","description":"\u003cp\u003eNinety-eight decibels at 7,500 rpm. Spark developed this configuration together with Kawasaki Germany for events that enforce the strictest noise limit in European club racing — the one that turns most aftermarket exhausts away at the gate.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRacing full system for the Kawasaki ZX-4RR.\u003c\/li\u003e\n\u003cli\u003eDeveloped with Kawasaki Germany to stay within 98 dB at 7,500 rpm.\u003c\/li\u003e\n\u003cli\u003eForce Evo silencer in the 400 mm configuration.\u003c\/li\u003e\n\u003cli\u003eTwo dedicated dB killers supplied.\u003c\/li\u003e\n\u003cli\u003eAISI 304 stainless 4-2-1 manifold with CNC-machined connections.\u003c\/li\u003e\n\u003cli\u003e4.9 kg against 9.4 kg for the standard system.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eBuilt to 98, Not Tuned Down to It\u003c\/h2\u003e\u003cp\u003eThere is a difference between an exhaust that happens to measure quietly and one designed against a number. Spark lists three other configurations for this motorcycle at 105 dB, at the British championship limit, and with no limit at all. This is the fourth, and the only one built for 98.\u003c\/p\u003e\u003cp\u003eTwo things get it there: the longer 400 mm case, which gives the packing more volume to work with, and the two dedicated dB killers that come with the system rather than as an accessory. Neither is optional if the number is the point.\u003c\/p\u003e\u003ch2\u003eWhy Kawasaki Germany\u003c\/h2\u003e\u003cp\u003eThe IDM and the German club series run to 98 dB, and a manufacturer importer has a direct interest in customers being able to race the bike it sells them. Spark's page calls this the IDM version, and the cooperation is stated on the article rather than implied.\u003c\/p\u003e\u003cp\u003eFor a rider entering those events, that is the useful part: the system exists because someone had to make the numbers work in that specific rulebook.\u003c\/p\u003e\u003ch2\u003eUnder the Silencer\u003c\/h2\u003e\u003cp\u003eThe manifold is AISI 304 stainless in a 4-2-1 layout, with diameters and tapers Spark designed and tested rather than carried over. The connections are machined from solid on a CNC, and the compensators are sized rather than standard — Spark attributes both to its Superbike and Moto2 work.\u003c\/p\u003e\u003cp\u003eThe result is 4.9 kilos against 9.4 for the standard exhaust: four and a half kilos off a 400 that weighs under 190 wet.\u003c\/p\u003e\u003ch2\u003eAgainst the Louder Options\u003c\/h2\u003e\u003cp\u003e1,649 euro here, against 1,559 for the 105 dB Force Evo system and 1,536 for the Konix Evo built to the British limit. You pay roughly a hundred euro for the quieter specification, which is cheap next to a wasted race weekend.\u003c\/p\u003e\u003cp\u003eIf your events have no static limit, the Grid-O system GKA8851T is the one Spark builds without one.\u003c\/p\u003e\u003ch2\u003eInstallation\u003c\/h2\u003e\u003cp\u003eFull system: the standard 4-2-1 exhaust comes off entirely. Spark's mounting kit includes the hanger to the chassis for race use and a separate hanger that keeps the passenger footpeg, so the system can be fitted to a standard motorcycle without stripping the rear.\u003c\/p\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cp\u003eKawasaki ZX-4RR, 2023 to 2026. The 105 dB Force Evo system is GKA8852T, the Konix Evo system GKA8850T and the unrestricted Grid-O system GKA8851T. The 400 mm Force Evo silencer of this system, sold separately, is GKA8855ST.\u003c\/p\u003e\u003ch2\u003eRoad Approval\u003c\/h2\u003e\u003cp\u003eNone. Spark lists this article as not approved. Closed course only — the 98 dB figure is a circuit noise limit, not a road homologation.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePart number: GKA8855T\u003c\/li\u003e\n\u003cli\u003eType: Full system, racing\u003c\/li\u003e\n\u003cli\u003eSilencer: Force Evo, 400 mm, titanium with carbon end cap\u003c\/li\u003e\n\u003cli\u003eManifold: AISI 304 stainless, 4-2-1, CNC-machined connections\u003c\/li\u003e\n\u003cli\u003eNoise: within 98 dB at 7,500 rpm\u003c\/li\u003e\n\u003cli\u003eIncluded: two dedicated dB killers, chassis hanger, passenger-footpeg hanger\u003c\/li\u003e\n\u003cli\u003eWeight: 4.9 kg (standard system 9.4 kg)\u003c\/li\u003e\n\u003cli\u003eRoad approval: none, track use\u003c\/li\u003e\n\u003cli\u003eFitment: Kawasaki ZX-4RR (2023-2026)\u003c\/li\u003e\n\u003cli\u003eManufacturer: Spark Exhaust Technology, Mantova, Italy\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53610694574346,"sku":"GKA8855T","price":1638.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/6914b7fc7bc12_97c835f7-8739-4636-af29-e112e06ccbcd.png?v=1788252590","url":"https:\/\/inter-pace.com\/en-us\/products\/spark-exhaust-force-evo-400-mm-98-db-idm-system-kawasaki-zx-4rr","provider":"Inter-Pace","version":"1.0","type":"link"}