{"product_id":"jetprime-sls-ais-block-off-plate-aprilia-rs-457-es-042","title":"JetPrime SLS\/AIS Block-Off Plate for Aprilia RS 457 (2024-2026) – JP ES 042","description":"\u003cp\u003eDeleting the PAIR system leaves two open ports on the cylinder head where the reed valves used to sit. They cannot stay open. The JP ES 042 is the CNC-machined aluminium plate that closes them on the RS 457 — a small part that turns a half-finished job into a finished one.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC-machined aluminium cover plate for the Aprilia RS 457\u003c\/li\u003e\n\u003cli\u003eReplaces the original PAIR system cover\u003c\/li\u003e\n\u003cli\u003eSeals the port permanently once the reed valve is removed\u003c\/li\u003e\n\u003cli\u003eMachined from solid, not cast or pressed\u003c\/li\u003e\n\u003cli\u003eUses the original mounting bolts and gasket location\u003c\/li\u003e\n\u003cli\u003ePurely mechanical — no electrical connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMechanical Half, Electrical Half\u003c\/h2\u003e\n\u003cp\u003eA complete PAIR delete has two sides. This plate is the mechanical half: it closes the head. The electrical half is the solenoid eliminator that keeps the ECU from reporting the missing valve. Fitting the plate alone will seal the engine but leave a fault on the dashboard; fitting the eliminator alone leaves an open port. Most owners do both, and JetPrime sells them together as a kit under a separate part number.\u003c\/p\u003e\n\u003ch2\u003eWhy Machined Rather Than Cast\u003c\/h2\u003e\n\u003cp\u003eThe plate sits against a hot cylinder head and is torqued against a sealing face. A machined billet plate holds its flatness under that load, which is what stops it weeping. It also looks like a considered part rather than a blanking disc, which matters on an engine that is otherwise on show.\u003c\/p\u003e\n\u003ch2\u003eFitting It\u003c\/h2\u003e\n\u003cp\u003eRemove the reed valve cover, take out the valve assembly, clean the sealing face and bolt the plate down in its place. No sealant is needed beyond what the original arrangement used. The job is straightforward on the 457's parallel twin, and there is nothing to adjust afterwards.\u003c\/p\u003e\n\u003ch2\u003eFitment and Compatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAprilia RS 457 (2024–2026)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRoad Approval\u003c\/h2\u003e\n\u003cp\u003eNone. The PAIR system is emissions equipment covered by the motorcycle's type approval. Closed-circuit and competition use only.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: JetPrime\u003c\/li\u003e\n\u003cli\u003ePart number: JP ES 042\u003c\/li\u003e\n\u003cli\u003eType: SLS\/AIS block-off plate\u003c\/li\u003e\n\u003cli\u003eFunction: CNC-machined cover plate replacing the original PAIR cover\u003c\/li\u003e\n\u003cli\u003eMaterial: CNC-machined aluminium\u003c\/li\u003e\n\u003cli\u003eInstallation: plug-and-play, no modification to the original wiring\u003c\/li\u003e\n\u003cli\u003eFitment: Aprilia RS 457 (2024–2026)\u003c\/li\u003e\n\u003cli\u003eRoad approval: none — closed-circuit and race use only\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JetPrime","offers":[{"title":"Default Title","offer_id":53627274232074,"sku":"JP ES 042","price":1435.0,"currency_code":"NIO","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/13_0_9e52e432-fc3f-48eb-8d3e-c9159644605e.png?v=1788520215","url":"https:\/\/inter-pace.com\/en-ni\/products\/jetprime-sls-ais-block-off-plate-aprilia-rs-457-es-042","provider":"Inter-Pace","version":"1.0","type":"link"}