{"title":"Short Blocks","description":"","products":[{"product_id":"honda-k20a-complete-built-wossner-bottom-end","title":"Bourne HPP Honda K20 Complete Forged Bottom End Short Block","description":"\u003ch2\u003e\u003cstrong\u003eBourne HPP Honda K20 Forged Short Block – High or Low Compression\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eBuild your engine on a foundation of motorsport excellence. The \u003cstrong\u003eBourne HPP K20 Forged Short Block\u003c\/strong\u003e is a professional-grade, fully assembled bottom end, built to order for those who demand uncompromising reliability and peak performance from their Honda K-Series.\u003c\/p\u003e\n\u003cp\u003eBy combining genuine Honda precision with world-class \u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003ca rel=\"noopener\" style=\"color: rgb(255, 42, 0);\" title=\"Bourne HPP Wossner Collection\" href=\"https:\/\/bournehpp.com\/collections\/wossner-pistons\" target=\"_blank\"\u003e\u003cstrong\u003eWössner\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e forged internals, we have created a bottom end capable of dominating the track while keeping the refined, high-revving character the K-Series is famous for.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eChoose Your Compression Ratio\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Compression 12.0:1:\u003c\/strong\u003e The choice for naturally aspirated builds. Maximum cylinder pressure for sharp throttle response and strong power throughout the rev range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLow Compression 9.0:1:\u003c\/strong\u003e Built for turbocharged and supercharged applications, giving you the headroom to run higher boost safely.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eOptional Hard Anodised Piston Crowns\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eUpgrade to a \u003cstrong\u003eHard Anodised Crown\u003c\/strong\u003e for added protection where it matters most. The hard anodised layer shields the piston crown from extreme combustion heat and helps resist detonation damage, making it an ideal choice for forced induction, endurance racing and high-load track use.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eThe Internal Powerhouse\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"Wossner Pistons\" href=\"https:\/\/bournehpp.com\/collections\/wossner-pistons\" target=\"_blank\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eWössner Forged Pistons\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003cstrong\u003e:\u003c\/strong\u003e Specifically engineered for the K20A2\/Z4 platforms, these pistons are the choice of Europe’s leading engine builders.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLow-Friction Technology:\u003c\/strong\u003e Coated with Wössner’s unique Moly-based skirt lubricant to reduce drag and allow for tighter tolerances.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAdvanced Metallurgy:\u003c\/strong\u003e Forged from 4032 T6 alloy, which minimizes thermal expansion and eliminates the \"piston slap\" common in lesser forged components.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOptimized Crowns:\u003c\/strong\u003e Polished to improve flame travel and resist carbon buildup and detonation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBourne HPP Spec \u003ca rel=\"noopener\" title=\"Bourne Wossner K20 Con rods\" href=\"https:\/\/bournehpp.com\/products\/bourne-con-rods-k20\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eWössner Connecting Rods\u003c\/span\u003e\u003c\/a\u003e:\u003c\/strong\u003e Crafted from high-tensile 4340 forged steel, these A-Beam rods provide a massive increase in strength over OEM units without any weight penalty.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum Security:\u003c\/strong\u003e Equipped with ARP 2000 bolts as standard to ensure rod-bolt integrity at extreme RPM.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eShot-Peened:\u003c\/strong\u003e Stress-relieved for maximum fatigue life during endurance racing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eMaster-Class Preparation\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAt Bourne HPP, every block undergoes a rigorous preparation phase before a single bolt is turned.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePristine Block Prep:\u003c\/strong\u003e We use a Genuine Honda K20 block that is blasted, de-burred and meticulously checked for casting integrity and perfect bore geometry. To ensure a perfect ring seal and head gasket mating surface, every block is precision bored, honed to specific tolerances and skimmed for absolute flatness.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThe \"Balanced\" Crank:\u003c\/strong\u003e We utilise a \u003cstrong\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003ca rel=\"noopener\" style=\"color: rgb(255, 42, 0);\" title=\"Genuine Honda Crankshaft\" href=\"https:\/\/bournehpp.com\/products\/genuine-honda-crankshaft-k-series-k20a-k20z\" target=\"_blank\"\u003eGenuine Honda Crankshaft\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e that is precision balanced to ensure smooth power delivery all the way to a 9,000+ RPM redline. \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBespoke Bearing Fitment:\u003c\/strong\u003e Every build uses brand new Genuine Honda main \u003cstrong\u003e\u003ca rel=\"noopener\" title=\"Genuine Honda Upper Bearings\" href=\"https:\/\/bournehpp.com\/products\/genuine-honda-k-series-k20a-k20z-bearing-main-daido-block-upper\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eUpper\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e, \u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e\u003ca rel=\"noopener\" style=\"color: rgb(255, 42, 0);\" title=\"Genuine Honda Lower Bearings\" href=\"https:\/\/bournehpp.com\/products\/genuine-honda-k-series-k20a-k20z-bearing-main-daido-cradle-lower\" target=\"_blank\"\u003eLower\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e and \u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003ca rel=\"noopener\" style=\"color: rgb(255, 42, 0);\" title=\"Honda Con Rod Bearings\" href=\"https:\/\/bournehpp.com\/products\/genuine-honda-k-series-k20a-k20z-bearing-daido-connecting-rod\" target=\"_blank\"\u003e\u003cstrong\u003erod bearings\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e, individually measured and matched to the specific journals of your crankshaft for perfect oil film clearances.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTotal Reliability:\u003c\/strong\u003e We include brand new Genuine Honda \u003cstrong\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003ca rel=\"noopener\" style=\"color: rgb(255, 42, 0);\" title=\"Genuine Honda Squirter Jets\" href=\"https:\/\/bournehpp.com\/products\/genuine-honda-engine-oil-jets-squirter-k-series-k20\" target=\"_blank\"\u003eSquirter Jets\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e, \u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e\u003ca rel=\"noopener\" style=\"color: rgb(255, 42, 0);\" title=\"Squirter Jet Bolts\" href=\"https:\/\/bournehpp.com\/products\/genuine-honda-engine-oil-jet-squirter-bolt-k-series-k20a-k20z\" target=\"_blank\"\u003eBolts\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e and \u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e\u003ca rel=\"noopener\" style=\"color: rgb(255, 42, 0);\" title=\"Genuine Honda Thrust Washers\" href=\"https:\/\/bournehpp.com\/products\/genuine-honda-k-series-k20a-k20z-washer-thrust-taiho\" target=\"_blank\"\u003eThrust Washers\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e to keep your forged pistons cool and your crank centred under heavy lateral G-loads.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 28%;\"\u003e\u003cstrong\u003eComponent\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72%;\"\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\u003cstrong\u003eEngine Block\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGenuine Honda K20 (Blasted, De-burred, Rebored and Honed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePistons\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWössner Forged – 12.0:1 High Compression or 9.0:1 Low Compression (4032 T6 Alloy \/ Moly Coated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Crown\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard or Hard Anodised (optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnecting Rods\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWössner A-Beam with ARP 2000 Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCrankshaft\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGenuine Honda OEM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBearings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGenuine Honda (Measured and fitted for perfect clearances)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHardware\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew OEM Honda Squirters \u0026amp; Thrust Washers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Bourne HPP Advantage:\u003c\/strong\u003e This is a drop-in forged short block for serious K-Series enthusiasts. Whether you are aiming for a high-response 300+ bhp naturally aspirated build, a boosted track car or a high-revving street beast, this bottom end offers the peace of mind that only professional motorsport assembly can provide.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCustom Builds:\u003c\/strong\u003e We can build these engines to any piston and bore size required, and can also spec different aftermarket pistons. \u003cstrong\u003eContact us for more info.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReady for your choice of cylinder head. Engineered to win.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Bourne HPP","offers":[{"title":"High Compression Forged Pistons 12.0:1 \/ Standard Crown","offer_id":57737724985719,"sku":"BHP-K20WBE-HC","price":4200.0,"currency_code":"GBP","in_stock":true},{"title":"High Compression Forged Pistons 12.0:1 \/ Hard Anodised Crown","offer_id":57737725018487,"sku":"BHP-K20WBE-HC-HA","price":4517.75,"currency_code":"GBP","in_stock":true},{"title":"Low Compression Forged Pistons 9.0:1 \/ Standard Crown","offer_id":57737725051255,"sku":"BHP-K20WBE-LC","price":4200.0,"currency_code":"GBP","in_stock":true},{"title":"Low Compression Forged Pistons 9.0:1 \/ Hard Anodised Crown","offer_id":57737725084023,"sku":"BHP-K20WBE-LC-HA","price":4517.75,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/5592\/4087\/files\/Bourne_HPP_Honda_K20_Forged_Cylinder_Block_Assembled_1.png?v=1775058774"}],"url":"https:\/\/bournehpp.com\/collections\/short-blocks.oembed","provider":"Bourne HPP LTD","version":"1.0","type":"link"}