{"product_id":"wossner-prelude-si-h23-9-1-comp-forged-piston-kit","title":"Wossner Prelude Si H23 9:1 Compression Forged Piston Kit","description":"\u003ch2 data-path-to-node=\"3\" class=\"\"\u003eWossner Prelude Si H23 9:1 Comp Forged Piston Kit\u003c\/h2\u003e\n\u003cp data-path-to-node=\"4\"\u003e\u003cspan class=\"\"\u003eThe Wossner Prelude Si H23 9:\u003c\/span\u003e\u003cspan class=\"\"\u003e1 Compression Forged Piston Kit is the ultimate internal upgrade for the non-VTEC H-Series engine.\u003c\/span\u003e\u003cspan class=\"\"\u003e Designed specifically for the H23A1 and H23A2 powerplants,\u003c\/span\u003e\u003cspan class=\"\"\u003e this kit is the perfect solution for owners looking to transition from naturally aspirated to high-boost turbocharging.\u003c\/span\u003e\u003cspan class=\"\"\u003e By lowering the compression ratio to 9.\u003c\/span\u003e\u003cspan class=\"\"\u003e0:\u003c\/span\u003e\u003cspan class=\"\"\u003e1,\u003c\/span\u003e\u003cspan class=\"\"\u003e Wossner provides the necessary thermal headroom and safety margin against detonation,\u003c\/span\u003e\u003cspan class=\"\"\u003e allowing for more aggressive tuning and substantial power increases without compromising engine reliability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003e\u003cspan class=\"\"\u003eEngineered for the demands of high-performance tuning,\u003c\/span\u003e\u003cspan class=\"\"\u003e these pistons are forged from 4032-T6 high-silicon aluminium alloy.\u003c\/span\u003e\u003cspan class=\"\"\u003e This specific material is chosen for its superior strength-to-weight ratio and low thermal expansion,\u003c\/span\u003e\u003cspan class=\"\"\u003e ensuring a quiet operation even during cold starts.\u003c\/span\u003e\u003cspan class=\"\"\u003e Each piston undergoes a rigorous manufacturing process that includes Wossner’s signature Moly-based skirt coating to reduce internal friction and mirror-polished crowns to eliminate hot spots.\u003c\/span\u003e\u003cspan class=\"\"\u003e Whether you are building a fast-road Prelude or a dedicated track car,\u003c\/span\u003e\u003cspan class=\"\"\u003e this kit provides the durability required for elite competition.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"6\" class=\"\"\u003eKey Performance Features\u003c\/h3\u003e\n\u003cul data-path-to-node=\"7\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,0,0\"\u003e\u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"0\" class=\"\"\u003eTurbo-Optimised 9.0:1 Compression\u003c\/b\u003e\u003cspan class=\"\"\u003e:\u003c\/span\u003e\u003cspan class=\"\"\u003e Specially engineered to handle the increased cylinder pressures and heat of forced induction builds.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,1,0\"\u003e\u003cb data-path-to-node=\"7,1,0\" data-index-in-node=\"0\" class=\"\"\u003e4032-T6 Forged Aluminium\u003c\/b\u003e\u003cspan class=\"\"\u003e:\u003c\/span\u003e\u003cspan class=\"\"\u003e Premium high-silicon alloy offers maximum structural integrity with low expansion rates for tighter clearances.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,2,0\"\u003e\u003cb data-path-to-node=\"7,2,0\" data-index-in-node=\"0\" class=\"\"\u003eFriction-Reducing Moly Coating\u003c\/b\u003e\u003cspan class=\"\"\u003e:\u003c\/span\u003e\u003cspan class=\"\"\u003e Advanced skirt treatment minimises parasitic drag and protects cylinder walls from scuffing under load.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,3,0\"\u003e\u003cb data-path-to-node=\"7,3,0\" data-index-in-node=\"0\" class=\"\"\u003eMirror-Polished Crowns\u003c\/b\u003e\u003cspan class=\"\"\u003e:\u003c\/span\u003e\u003cspan class=\"\"\u003e Hand-finished to reflect heat and ensure an even flame front,\u003c\/span\u003e\u003cspan class=\"\"\u003e preventing pre-ignition and carbon build-up.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,4,0\"\u003e\u003cb data-path-to-node=\"7,4,0\" data-index-in-node=\"0\" class=\"\"\u003eComplete Performance Kit\u003c\/b\u003e\u003cspan class=\"\"\u003e:\u003c\/span\u003e\u003cspan class=\"\"\u003e Supplied as a set of four,\u003c\/span\u003e\u003cspan class=\"\"\u003e including high-strength gudgeon pins,\u003c\/span\u003e\u003cspan class=\"\"\u003e precision rings,\u003c\/span\u003e\u003cspan class=\"\"\u003e and heavy-duty circlips.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"9\" class=\"\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable data-path-to-node=\"10\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,1,0,0\"\u003e\u003cb data-path-to-node=\"10,1,0,0\" data-index-in-node=\"0\"\u003eEngine Code\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,1,1,0\"\u003eHonda H23A1 \/ H23A2\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,2,0,0\"\u003e\u003cb data-path-to-node=\"10,2,0,0\" data-index-in-node=\"0\"\u003eVehicle Fitment\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,2,1,0\"\u003eHonda Prelude Si (1992–1996)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,3,0,0\"\u003e\u003cb data-path-to-node=\"10,3,0,0\" data-index-in-node=\"0\"\u003eBore Size Options\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,3,1,0\"\u003e87.00mm (Std) \/ 87.50mm \/ 88.00mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,4,0,0\"\u003e\u003cb data-path-to-node=\"10,4,0,0\" data-index-in-node=\"0\"\u003eCompression Ratio\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,4,1,0\"\u003e9.0:1 (Turbo \/ Low Compression)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,5,0,0\"\u003e\u003cb data-path-to-node=\"10,5,0,0\" data-index-in-node=\"0\"\u003eCompression Height\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,5,1,0\"\u003e30.58mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,6,0,0\"\u003e\u003cb data-path-to-node=\"10,6,0,0\" data-index-in-node=\"0\"\u003eStroke\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,6,1,0\"\u003e95.00mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,7,0,0\"\u003e\u003cb data-path-to-node=\"10,7,0,0\" data-index-in-node=\"0\"\u003ePin Diameter\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,7,1,0\"\u003e22.00mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,8,0,0\"\u003e\u003cb data-path-to-node=\"10,8,0,0\" data-index-in-node=\"0\"\u003eDome Volume\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,8,1,0\"\u003e-12.0cc\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,9,0,0\"\u003e\u003cb data-path-to-node=\"10,9,0,0\" data-index-in-node=\"0\"\u003eMaterial\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,9,1,0\"\u003e4032-T6 Forged Aluminium\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-path-to-node=\"12\" class=\"\"\u003e\u003c\/h3\u003e\n\u003ch3 data-path-to-node=\"12\" class=\"\"\u003eWhy Choose Wossner?\u003c\/h3\u003e\n\u003cp data-path-to-node=\"13\"\u003e\u003cspan\u003eWossner is globally recognised as a pioneer in high-performance engine internals,\u003c\/span\u003e\u003cspan\u003e with a heritage rooted in European motorsport and precision engineering.\u003c\/span\u003e\u003cspan\u003e By owning and operating their own forging plant in Germany,\u003c\/span\u003e\u003cspan\u003e Wossner maintains absolute control over the quality and consistency of their aluminium alloys.\u003c\/span\u003e\u003cspan\u003e This vertical integration allows them to produce pistons that are lighter,\u003c\/span\u003e\u003cspan\u003e stronger,\u003c\/span\u003e\u003cspan\u003e and more thermally efficient than standard cast or mass-produced forged components.\u003c\/span\u003e\u003cspan\u003e When you choose Wossner for your Honda H23 build,\u003c\/span\u003e\u003cspan\u003e you are installing a product trusted by world-class engine builders to deliver podium-winning performance and daily-driver reliability.\u003c\/span\u003e\u003c\/p\u003e","brand":"Wossner","offers":[{"title":"87.5mm","offer_id":56801130709367,"sku":"K9497D050","price":588.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/5592\/4087\/files\/WossnerPreludeSIH23ForgedPiston1.jpg?v=1772203611","url":"https:\/\/bournehpp.com\/products\/wossner-prelude-si-h23-9-1-comp-forged-piston-kit","provider":"Bourne HPP LTD","version":"1.0","type":"link"}