{"product_id":"s65-4-2l-street-performance-engine","title":"S65 4.2L Street Performance Engine","description":"\u003cdiv class=\"OutlineElement Ltr SCXW73371451 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW73371451 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eS65 Engine — Street Performance (4.2L)\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW73371451 BCX0\" data-ccp-props='{\"134233117\":true,\"134233118\":true,\"201341983\":0,\"335559740\":240}'\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW73371451 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW73371451 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SpellingErrorV2Themed SCXW73371451 BCX0\"\u003eCarBahn\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003eS65\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eStreet Performance\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003eengine is engineered to address the known durability limitations of the BMW S65 platform while preserving its high-revving character and naturally aspirated performance. Designed for street and track-day use, this build focuses on improved reliability, sustained high-RPM operation, and long-term durability over the OEM engine.\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW73371451 BCX0\" data-ccp-props='{\"134233117\":true,\"134233118\":true,\"201341983\":0,\"335559740\":240}'\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW73371451 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW73371451 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eOEM Limitations\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW73371451 BCX0\" data-ccp-props='{\"134233117\":true,\"134233118\":true,\"201341983\":0,\"335559740\":240}'\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW73371451 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW73371451 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eThe BMW S65 engine is known for several inherent wear points that can compromise reliability over time.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eConnecting rod bearings and valve springs\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003eare common failure items on both S65 and S85 engines, particularly in high-RPM or track-driven applications. Left unaddressed, these components can lead to accelerated wear, valvetrain instability, or catastrophic engine failure.\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW73371451 BCX0\" data-ccp-props='{\"134233117\":true,\"134233118\":true,\"201341983\":0,\"335559740\":240}'\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW73371451 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW73371451 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SpellingErrorV2Themed SCXW73371451 BCX0\"\u003eCarBahn\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003eEngineering Solutions\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW73371451 BCX0\" data-ccp-props='{\"134233117\":true,\"134233118\":true,\"201341983\":0,\"335559740\":240}'\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW73371451 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW73371451 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SpellingErrorV2Themed SCXW73371451 BCX0\"\u003eCarBahn\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003eS65 engine addresses these weaknesses through targeted internal upgrades and a comprehensive rebuild process.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eOEM connecting rod bearings are replaced with high-performance\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SpellingErrorV2Themed SCXW73371451 BCX0\"\u003eCarBahn\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003ebearings\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003edesigned to improve durability under sustained high-RPM operation.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SpellingErrorV2Themed SCXW73371451 BCX0\"\u003eCarBahn\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003ehigh-performance valve springs\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003eare installed to maintain valvetrain control at elevated engine speeds.\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW73371451 BCX0\" data-ccp-props='{\"134233117\":true,\"134233118\":true,\"201341983\":0,\"335559740\":240}'\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW73371451 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW73371451 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eThe engine is upgraded with\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e2mm\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003eoversized\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e94mm\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SpellingErrorV2Themed SCXW73371451 BCX0\"\u003eCarBahn\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e-CP forged pistons\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e, increasing displacement while improving strength and thermal stability compared to the factory cast pistons. New\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003ehead gaskets\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003eare installed to ensure proper sealing and long-term reliability.\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW73371451 BCX0\" data-ccp-props='{\"134233117\":true,\"134233118\":true,\"201341983\":0,\"335559740\":240}'\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW73371451 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW73371451 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eComprehensive Rebuild \u0026amp; Timing Service\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW73371451 BCX0\" data-ccp-props='{\"134233117\":true,\"134233118\":true,\"201341983\":0,\"335559740\":240}'\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW73371451 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW73371451 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eEach engine receives a complete top-end and timing service as part of the rebuild process. This includes a\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003efull valve job with new hydraulic lifters\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e, along with\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003enew timing chains, timing chain guides, timing chain tensioners\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e, and all associated seals and gaskets. These components are replaced proactively to ensure long-term reliability and consistent performance.\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW73371451 BCX0\" data-ccp-props='{\"134233117\":true,\"134233118\":true,\"201341983\":0,\"335559740\":240}'\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW73371451 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW73371451 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eHigh-Revving Reliability, Preserved Character\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW73371451 BCX0\" data-ccp-props='{\"134233117\":true,\"134233118\":true,\"201341983\":0,\"335559740\":240}'\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW73371451 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW73371451 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SpellingErrorV2Themed SCXW73371451 BCX0\"\u003eCarBahn\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003eS65 Street Performance engine\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eretains\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003ethe naturally aspirated responsiveness and high-RPM character that\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun ContextualSpellingAndGrammarErrorV2Themed SCXW73371451 BCX0\"\u003edefine\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003ethe S65 platform, while addressing the known durability shortcomings of the OEM engine. The result is a significantly more reliable and robust engine suitable for spirited street driving and track-day use.\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW73371451 BCX0\" data-ccp-props='{\"134233117\":true,\"134233118\":true,\"201341983\":0,\"335559740\":240}'\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW73371451 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW73371451 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun MacChromeBold SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eProven\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SpellingErrorV2Themed SCXW73371451 BCX0\"\u003eCarBahn\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003eAssembly\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW73371451 BCX0\" data-ccp-props='{\"134233117\":true,\"134233118\":true,\"201341983\":0,\"335559740\":240}'\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW73371451 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW73371451 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW73371451 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003eEach\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SpellingErrorV2Themed SCXW73371451 BCX0\"\u003eCarBahn\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003eS65 engine is assembled using the same processes and by the same personnel responsible for\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SpellingErrorV2Themed SCXW73371451 BCX0\"\u003eCarBahn’s\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW73371451 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003echampionship-winning race engine programs. With over 46 years of BMW engine-building experience, these engines reflect the same attention to detail and durability that have powered multiple championship-winning efforts, including three prototype racing championships and two overall victories at the 24 Hours of Daytona (2011–2013).\u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"CarBahn","offers":[{"title":"Default Title","offer_id":53314676392258,"sku":"CBB06-08-6521","price":20995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0918\/3369\/6578\/files\/S65-in-crate-3.jpg?v=1778878367","url":"https:\/\/buypureflow.com\/products\/s65-4-2l-street-performance-engine","provider":"PureFlow Performance","version":"1.0","type":"link"}