{"product_id":"spark-exhaust-stainless-racing-manifold-d-65-yamaha-r1","title":"Spark Exhaust Stainless Racing Manifold D.65 Yamaha R1 (2015-2025) GYA8881R","description":"\u003cp\u003eThe stainless collector from Spark's full R1 system, sold on its own. Sixty-five millimetres of primary diameter, four cylinders into one, and no catalytic converter anywhere in it — the piece that does most of the work in a full system, without the silencer you may already own.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAISI stainless steel D.65 racing manifold for the Yamaha R1 and R1M.\u003c\/li\u003e\n\u003cli\u003eReplaces the standard headers and eliminates the catalytic converter.\u003c\/li\u003e\n\u003cli\u003eTakes any of Spark's D.65 silencer groups.\u003c\/li\u003e\n\u003cli\u003eAround five hundred and seventy euros less than the titanium manifolds.\u003c\/li\u003e\n\u003cli\u003eSupplied without a silencer.\u003c\/li\u003e\n\u003cli\u003e2015 to 2025 model years.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eBuying the Collector Separately\u003c\/h2\u003e\u003cp\u003eTwo situations make this sensible. The first is a staged build: the collector is the expensive, permanent half of a full system, and silencers get changed when a series changes its noise rule or when a crash takes one out. Buying the collector first and choosing the silencer later is a rational order of operations.\u003c\/p\u003e\u003cp\u003eThe second is an upgrade from a 3\/4 kit. If you already run a Spark D.60 kit and want the flow of the full D.65 system, this is the part that gets you there — and your existing silencer may well carry over, depending on which one it is.\u003c\/p\u003e\u003ch2\u003eWhy Diameter Is the Headline\u003c\/h2\u003e\u003cp\u003eSpark names its R1 products by collector diameter rather than by model name, and the numbers run D.54, D.60 and D.65. That ordering is the product range: a larger primary bore raises what the top end can flow and moves the torque peak up the rev range. D.65 is the racing end of it, developed with teams in international championships.\u003c\/p\u003e\u003cp\u003eThe trade is the one every race exhaust makes. More top end, less low-down flexibility, and a mapping requirement that a standard ECU calibration will not satisfy.\u003c\/p\u003e\u003ch2\u003eStainless Instead of Titanium\u003c\/h2\u003e\u003cp\u003eSpark builds this manifold in both. Stainless costs a great deal less, weighs a few hundred grams more, and is more tolerant of the abuse a manifold actually takes — stone chips off the front wheel, pressure washing, the occasional paddock stand in the wrong place. For a bike that is not chasing a class weight limit, the case for stainless in the hottest, most exposed section of the exhaust is a strong one.\u003c\/p\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cp\u003eYamaha R1 and R1M, 2015 through 2025. The titanium equivalents are GYA8880R in the STEP2 specification and GYA8894R in the EWC specification. Complete with a Force Evo silencer this manifold becomes GYA8881T.\u003c\/p\u003e\u003ch2\u003eRoad Approval\u003c\/h2\u003e\u003cp\u003eNone. The manifold removes the catalytic converter, which rules out road use on its own regardless of the silencer behind it.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePart number: GYA8881R\u003c\/li\u003e\n\u003cli\u003eType: Racing manifold, full system\u003c\/li\u003e\n\u003cli\u003eDiameter: 65 mm\u003c\/li\u003e\n\u003cli\u003eMaterial: Stainless steel\u003c\/li\u003e\n\u003cli\u003eCatalytic converter: removed\u003c\/li\u003e\n\u003cli\u003eSilencer: not included\u003c\/li\u003e\n\u003cli\u003eFitment: Yamaha R1 \/ R1M (2015-2025)\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":53606314082570,"sku":"GYA8881R","price":1606.69,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/GYA8881R.png?v=1788444384","url":"https:\/\/inter-pace.com\/en-ca\/products\/spark-exhaust-stainless-racing-manifold-d-65-yamaha-r1","provider":"Inter-Pace","version":"1.0","type":"link"}