{"product_id":"stage-3-s63-high-performance-engine-tu4-bmw-m5-m8","title":"Stage 3 S63 High Performance Engine (TU4) | BMW M5\/M8","description":"\u003cp\u003eThe S63 engine is not designed to have large increase in boost. CarBahn has designed a high-performance engine to handle very high outputs by utilizing higher quality racing components. This engine includes higher quality racing Forged Carrillo connecting rods, CP forged pistons and CarBahn high-performance valve springs, ported heads and reground crankshaft with stronger bearings. This Engine includes a complete rebuild with a valve job, timing chains, chain guides, tensioners, water pump thermostat, new bearings, seals and gaskets.\u003c\/p\u003e\n\u003cp\u003eThe stock high compression ratio is high for CAFÉ. (Corporate average fuel economy). However, this increased compression limits engine performance with higher boost setting by decreasing the size of the fuel air charge in the combustion chamber and by forcing the ignition timing to retard far below MBT (mean best timing). The CarBahn engine has .5 less compression to optimize the engine for the increased boost. If this an emissions legal street car the lowered compression has the added benefit of reducing catalyst inlet temperatures and improved drivability on pump gas.\u003c\/p\u003e\n\u003cp\u003eIncludes, Forged Rods, Forged Pistons, high performance valve springs for more boost, Ported heads, Reground crankshaft with stronger bearings, Labor and machine work for complete overhaul.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: large;\"\u003e\u003cb\u003eEngine core acceptance parameters\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eMust be complete core (factory engine, from oil pan to valve cover)\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBlock must have no:\n\u003cul\u003e\n\u003cli\u003eHoles or cracks in casting\u003c\/li\u003e\n\u003cli\u003eHoles or crack in covers\u003c\/li\u003e\n\u003cli\u003eBore damage that cannot be honed out\u003c\/li\u003e\n\u003cli\u003eThrust surface damage\u003c\/li\u003e\n\u003cli\u003eJournal surfaces damage\u003c\/li\u003e\n\u003cli\u003eBolt hole damage that can’t be repaired\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeads must have no:\n\u003cul\u003e\n\u003cli\u003eHoles or cracks in casting\u003c\/li\u003e\n\u003cli\u003eHoles or crack in covers\u003c\/li\u003e\n\u003cli\u003eThrust surface damage\u003c\/li\u003e\n\u003cli\u003eJournal surfaces damage\u003c\/li\u003e\n\u003cli\u003eBolt hole damage that can’t be repaired\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdditional repair charges could apply for damaged items that are not normally changed during an overhaul and cannot be repaired or serviced\n\u003cul\u003e\n\u003cli\u003eValves\u003c\/li\u003e\n\u003cli\u003eCrankshafts\u003c\/li\u003e\n\u003cli\u003eCamshafts\u003c\/li\u003e\n\u003cli\u003eGuides\u003c\/li\u003e\n\u003cli\u003eValveTronic mechanism\u003c\/li\u003e\n\u003cli\u003eVanos mechanism\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"CarBahn","offers":[{"title":"Stock Compression","offer_id":44404817395920,"sku":"CB463-6003-SC","price":27999.0,"currency_code":"USD","in_stock":true},{"title":"Low Compression","offer_id":44404817428688,"sku":"CB463-6003-LC","price":27999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/5886\/1520\/files\/CBB463-6003_c718ec5a-a173-4810-a65e-3579788a8848.jpg?v=1738241767","url":"https:\/\/motorworkswest.shop\/products\/stage-3-s63-high-performance-engine-tu4-bmw-m5-m8","provider":"Motor Works West","version":"1.0","type":"link"}