{"product_id":"kb-performance-kb257-030-piston-set-25-5cc-domed-for-big-block-chevrolet","title":"KB Performance KB257.030 Piston Set +25.5cc Domed for Big Block Chevrolet","description":"\u003cp\u003eTechnical Specs: Alloy: Hypereutectic 390 Bore: 4.280'' Crankshaft Stroke: 4.000'' Connecting Rod Length: 6.135'' Deck Height: 9.800'' Compression Height: 1.645'' Pin Size: 0.990'' Pin Location: Centered Hollow Dome Top: .250'' 26cc IV (Open Chamber Head) Intake Valve Relief: 0.266'' Depth \/ 2.310'' Diameter Exhaust Valve Relief: N\/A Top Landing Height: 0.308'' Ring Grooves: 5\/64'' Top; 5\/64'' Middle; 3\/16'' Bottom Gram Weight: 650\/158 Compression Ratio: 10.2:1 w\/119cc Heads\u003c\/p\u003e","brand":"United Engine \u0026 Machine Co","offers":[{"title":"Default Title","offer_id":51748957159706,"sku":"SLVKB257.030","price":79.87,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0975\/8942\/8506\/files\/61DRbFwQAyL.jpg?v=1772041908","url":"https:\/\/trybeepbeep.com\/products\/kb-performance-kb257-030-piston-set-25-5cc-domed-for-big-block-chevrolet","provider":"TryBeepbeep","version":"1.0","type":"link"}