{"product_id":"spark-exhaust-force-evo-400-mm-silencer-with-heat-shield-yamaha-r9","title":"Spark Exhaust Force Evo 400 mm Silencer with Heat Shield Yamaha R9 (2025-2026) G00SI44T","description":"\u003cp\u003eSame Force Evo silencer, 400 mm of case instead of 350. Those extra fifty millimetres exist for one reason: to bring the decibel reading down far enough to get through scrutineering at circuits that enforce a hard limit. If your track days keep ending early because of the noise meter, this is the part number that solves it.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eForce Evo silencer in the longer 400 mm case, supplied as a group with its heat shield.\u003c\/li\u003e\n\u003cli\u003eThe extra case length is a noise measure, not a styling choice — more volume means more attenuation.\u003c\/li\u003e\n\u003cli\u003eTitanium case with the characteristic rib converging into the carbon end cap.\u003c\/li\u003e\n\u003cli\u003eTitanium sleeve, perforated inner tube and inner end cap.\u003c\/li\u003e\n\u003cli\u003eFits Spark's R9 collectors GYA8801 and GYA8802.\u003c\/li\u003e\n\u003cli\u003eMade by Spark in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eBuild Quality \u0026amp; Materials\u003c\/h2\u003e\u003cp\u003eStructurally this is the 350 mm Force Evo with a longer body: the same titanium construction, the same rib pressed into the case, the same carbon end cap. The rib is there because a thin titanium shell needs stiffening, and stretching the case by fifty millimetres increases the span it has to bridge — one of the quiet reasons Spark keeps the feature rather than dropping it for a cleaner surface.\u003c\/p\u003e\u003cp\u003eThe heat shield comes with the group. On a longer case it covers more of the tube, which matters if your rearsets sit high.\u003c\/p\u003e\u003ch2\u003ePerformance \u0026amp; Sound\u003c\/h2\u003e\u003cp\u003eExtra length buys attenuation. Spark does not publish a figure for the 400 mm case on the R9, but the pattern across its range is consistent: on the Kawasaki ZX-4RR, moving from the standard Force Evo to the longer version takes the reading from 105 dB to 98 dB at 7,500 rpm. Expect a comparable relationship here, and ask us for the R9 measurement if a specific number decides whether you can ride.\u003c\/p\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cp\u003eFor Spark's R9 collectors GYA8801 and GYA8802. Check that your bodywork and rearsets clear the longer case before ordering — on some track setups the extra fifty millimetres is exactly where a bracket lives. The shorter version of the same silencer is GYA8801ST.\u003c\/p\u003e\u003ch2\u003eRoad Approval\u003c\/h2\u003e\u003cp\u003eNone. Quieter is not the same as legal: this silencer group has no EC approval and belongs on a circuit.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePart number: G00SI44T\u003c\/li\u003e\n\u003cli\u003eType: Silencer group with heat shield\u003c\/li\u003e\n\u003cli\u003eDesign: Force Evo, 400 mm case\u003c\/li\u003e\n\u003cli\u003eMaterial: Titanium case, carbon end cap\u003c\/li\u003e\n\u003cli\u003eCase length: 400 mm\u003c\/li\u003e\n\u003cli\u003eHeat shield: included\u003c\/li\u003e\n\u003cli\u003eFits: Spark R9 collectors GYA8801 \/ GYA8802\u003c\/li\u003e\n\u003cli\u003eFitment: Yamaha R9 (2025-2026)\u003c\/li\u003e\n\u003cli\u003eRoad approval: None — track use only\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":53605291884810,"sku":"G00SI44T","price":732.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/g00si44t-daempfer_efe8e907-5209-444b-9a9e-a772c7053713.png?v=1788262527","url":"https:\/\/inter-pace.com\/en-nl\/products\/spark-exhaust-force-evo-400-mm-silencer-with-heat-shield-yamaha-r9","provider":"Inter-Pace","version":"1.0","type":"link"}