{
  "v": "2.0",
  "page_type": "product",
  "title": "Speed Pro L-2491NF 40 Speed-Pro Forged Pistons | Summit Racing",
  "breadcrumbs": [
    {
      "label": "Home",
      "href": "/python/html6/index.html"
    },
    {
      "label": "Brands",
      "href": "/python/html6/menu_brand_index/menu_brand_index_brands_87101ba214.html"
    },
    {
      "label": "Speed Pro",
      "href": "/python/html6/menu_brand_products/1000/140000/menu_brand_products_SpeedPro_1_93f390d6e4.html"
    },
    {
      "label": "L-2491NF 40",
      "href": null
    }
  ],
  "content": {
    "product": {
      "mpn": "L-2491NF 40",
      "manufacturer": "Speed Pro",
      "brand": "Speed Pro",
      "brand_url": "/python/html6/menu_brand_products/1000/140000/menu_brand_products_SpeedPro_1_93f390d6e4.html",
      "title": "Speed Pro L-2491NF 40 Speed-Pro Forged Pistons | Summit Racing",
      "description": "",
      "attributes": [
        {
          "name": "Brand name",
          "values": [
            {
              "value": "Speed Pro",
              "url": "/python/html6/menu_attr_pair/1000/144000000/144543000/menu_attr_pair_Brandname_SpeedPro_1_268a8605c2.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/144000000/144543000/menu_attr_pair_Brandname_SpeedPro_1_268a8605c2.html"
        },
        {
          "name": "Manufacturer name",
          "values": [
            {
              "value": "Speed Pro",
              "url": "/python/html6/menu_attr_pair/1000/1000000/1829000/menu_attr_pair_Manufacturername_SpeedPro_1_195110be41.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/1000000/1829000/menu_attr_pair_Manufacturername_SpeedPro_1_195110be41.html"
        },
        {
          "name": "Manufacturer",
          "values": [
            {
              "value": "Speed Pro",
              "url": "/python/html6/menu_attr_pair/1000/160000000/160724000/menu_attr_pair_Manufacturer_SpeedPro_1_209789da25.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/160000000/160724000/menu_attr_pair_Manufacturer_SpeedPro_1_209789da25.html"
        },
        {
          "name": "DimensionUnit",
          "values": [
            {
              "value": "inch",
              "url": "/python/html6/menu_attr_pair/1000/10000000/10300000/menu_attr_pair_DimensionUnit_inch_1_f16129611b.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/10000000/10300000/menu_attr_pair_DimensionUnit_inch_1_f16129611b.html"
        },
        {
          "name": "Extra Product Name",
          "values": [
            {
              "value": "Speed Pro L-2491NF 40 Speed-Pro Forged Pistons | Summit Racing",
              "url": "/python/html6/menu_attr_pair/1000/260000000/260447000/menu_attr_pair_ExtraProductName_SpeedProL2491NF40SpeedProForgedPistonsSumm_1_508299aa47.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/260000000/260447000/menu_attr_pair_ExtraProductName_SpeedProL2491NF40SpeedProForgedPistonsSumm_1_508299aa47.html"
        },
        {
          "name": "UPC",
          "values": [
            {
              "value": "614046882423",
              "url": "/python/html6/menu_attr_pair/1000/13000000/13863000/menu_attr_pair_UPC_614046882423_1_7c9e626636.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/13000000/13863000/menu_attr_pair_UPC_614046882423_1_7c9e626636.html"
        },
        {
          "name": "diameter",
          "values": [
            {
              "value": "0.927",
              "url": "/python/html6/menu_attr_pair/1000/142000000/142128000/menu_attr_pair_diameter_0927_1_c878b4ec98.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/142000000/142128000/menu_attr_pair_diameter_0927_1_c878b4ec98.html"
        },
        {
          "name": "height",
          "values": [
            {
              "value": "1.43",
              "url": "/python/html6/menu_attr_pair/1000/238000000/238555000/menu_attr_pair_height_143_1_8e380fa009.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/238000000/238555000/menu_attr_pair_height_143_1_8e380fa009.html"
        },
        {
          "name": "height_Attrib",
          "values": [
            {
              "value": "Compression Height (in.)",
              "url": "/python/html6/menu_attr_pair/1000/227000000/227049000/menu_attr_pair_heightAttrib_CompressionHeightin_1_6d879d790a.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/227000000/227049000/menu_attr_pair_heightAttrib_CompressionHeightin_1_6d879d790a.html"
        },
        {
          "name": "length",
          "values": [
            {
              "value": "5.7",
              "url": "/python/html6/menu_attr_pair/1000/218000000/218502000/menu_attr_pair_length_57_1_fd06159a94.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/218000000/218502000/menu_attr_pair_length_57_1_fd06159a94.html"
        },
        {
          "name": "length_Attrib",
          "values": [
            {
              "value": "Rod Length",
              "url": "/python/html6/menu_attr_pair/1000/207000000/207960000/menu_attr_pair_lengthAttrib_RodLength_1_e6cefd3e23.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/207000000/207960000/menu_attr_pair_lengthAttrib_RodLength_1_e6cefd3e23.html"
        },
        {
          "name": "moq",
          "values": [
            {
              "value": "1",
              "url": "/python/html6/menu_attr_pair/1000/164000000/164262000/menu_attr_pair_moq_1_1_29ca727a89.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/164000000/164262000/menu_attr_pair_moq_1_1_29ca727a89.html"
        },
        {
          "name": "MPN",
          "values": [
            {
              "value": "L-2491NF 40",
              "url": "/python/html6/menu_attr_pair/1000/10000000/10555000/menu_attr_pair_MPN_L2491NF40_1_925dacb84a.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/10000000/10555000/menu_attr_pair_MPN_L2491NF40_1_925dacb84a.html"
        },
        {
          "name": "multiple",
          "values": [
            {
              "value": "1",
              "url": "/python/html6/menu_attr_pair/1000/257000000/257999000/menu_attr_pair_multiple_1_1_2f60c1bab8.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/257000000/257999000/menu_attr_pair_multiple_1_1_2f60c1bab8.html"
        },
        {
          "name": "qtyInStock",
          "values": [
            {
              "value": "Jun 12, 2023",
              "url": "/python/html6/menu_attr_pair/1000/255000000/255766000/menu_attr_pair_qtyInStock_Jun122023_1_2f3872f077.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/255000000/255766000/menu_attr_pair_qtyInStock_Jun122023_1_2f3872f077.html"
        },
        {
          "name": "SKU",
          "values": [
            {
              "value": "SLP-L2491NF40",
              "url": "/python/html6/menu_attr_pair/1000/61000000/61382000/menu_attr_pair_SKU_SLPL2491NF40_1_9f55ffcec3.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/61000000/61382000/menu_attr_pair_SKU_SLPL2491NF40_1_9f55ffcec3.html"
        },
        {
          "name": "tierMinQty1",
          "values": [
            {
              "value": "1",
              "url": "/python/html6/menu_attr_pair/1000/226000000/226987000/menu_attr_pair_tierMinQty1_1_1_974840705d.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/226000000/226987000/menu_attr_pair_tierMinQty1_1_1_974840705d.html"
        },
        {
          "name": "tierPrice1",
          "values": [
            {
              "value": "641.9900",
              "url": "/python/html6/menu_attr_pair/1000/155000000/155452000/menu_attr_pair_tierPrice1_6419900_1_fe9058c52a.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/155000000/155452000/menu_attr_pair_tierPrice1_6419900_1_fe9058c52a.html"
        },
        {
          "name": "width",
          "values": [
            {
              "value": "0.927",
              "url": "/python/html6/menu_attr_pair/1000/181000000/181336000/menu_attr_pair_width_0927_1_6acef8f7dc.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/181000000/181336000/menu_attr_pair_width_0927_1_6acef8f7dc.html"
        },
        {
          "name": "width_Attrib",
          "values": [
            {
              "value": "Pin Diameter (in.)",
              "url": "/python/html6/menu_attr_pair/1000/229000000/229401000/menu_attr_pair_widthAttrib_PinDiameterin_1_519c78e2ab.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/229000000/229401000/menu_attr_pair_widthAttrib_PinDiameterin_1_519c78e2ab.html"
        },
        {
          "name": "Brand",
          "values": [
            {
              "value": "Speed Pro",
              "url": "/python/html6/menu_attr_pair/1000/148000000/148790000/menu_attr_pair_Brand_SpeedPro_1_a6032bba13.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/148000000/148790000/menu_attr_pair_Brand_SpeedPro_1_a6032bba13.html"
        },
        {
          "name": "Manufacturer's Part Number",
          "values": [
            {
              "value": "L-2491NF 40",
              "url": "/python/html6/menu_attr_pair/1000/25000000/25988000/menu_attr_pair_ManufacturersPartNumber_L2491NF40_1_0ef7380aef.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/25000000/25988000/menu_attr_pair_ManufacturersPartNumber_L2491NF40_1_0ef7380aef.html"
        },
        {
          "name": "Part Type",
          "values": [
            {
              "value": "Pistons",
              "url": "/python/html6/menu_attr_pair/1000/77000000/77208000/menu_attr_pair_PartType_Pistons_1_2f0fb62096.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/77000000/77208000/menu_attr_pair_PartType_Pistons_1_2f0fb62096.html"
        },
        {
          "name": "Product Line",
          "values": [
            {
              "value": "Speed-Pro Forged Pistons",
              "url": "/python/html6/menu_attr_pair/1000/77000000/77345000/menu_attr_pair_ProductLine_SpeedProForgedPistons_1_64ce55becb.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/77000000/77345000/menu_attr_pair_ProductLine_SpeedProForgedPistons_1_64ce55becb.html"
        },
        {
          "name": "Summit Racing Part Number",
          "values": [
            {
              "value": "SLP-L2491NF40",
              "url": "/python/html6/menu_attr_pair/1000/30000000/30711000/menu_attr_pair_SummitRacingPartNumber_SLPL2491NF40_1_acb52d593f.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/30000000/30711000/menu_attr_pair_SummitRacingPartNumber_SLPL2491NF40_1_acb52d593f.html"
        },
        {
          "name": "Piston Rings Included",
          "values": [
            {
              "value": "No",
              "url": "/python/html6/menu_attr_pair/1000/124000000/124398000/menu_attr_pair_PistonRingsIncluded_No_1_38fd3286d8.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/124000000/124398000/menu_attr_pair_PistonRingsIncluded_No_1_38fd3286d8.html"
        },
        {
          "name": "Bore (in )",
          "values": [
            {
              "value": "4.040 in.",
              "url": "/python/html6/menu_attr_pair/1000/13000000/13041000/menu_attr_pair_Borein_4040in_1_dfb015f70a.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/13000000/13041000/menu_attr_pair_Borein_4040in_1_dfb015f70a.html"
        },
        {
          "name": "Bore (mm)",
          "values": [
            {
              "value": "102.616mm",
              "url": "/python/html6/menu_attr_pair/1000/125000000/125434000/menu_attr_pair_Boremm_102616mm_1_88d5be660d.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/125000000/125434000/menu_attr_pair_Boremm_102616mm_1_88d5be660d.html"
        },
        {
          "name": "Stroke",
          "values": [
            {
              "value": "3.750 in.",
              "url": "/python/html6/menu_attr_pair/1000/199000000/199550000/menu_attr_pair_Stroke_3750in_1_9f58307f40.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/199000000/199550000/menu_attr_pair_Stroke_3750in_1_9f58307f40.html"
        },
        {
          "name": "Engine Stroke Type",
          "values": [
            {
              "value": "Stroked",
              "url": "/python/html6/menu_attr_pair/1000/98000000/98233000/menu_attr_pair_EngineStrokeType_Stroked_1_31f5b4946d.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/98000000/98233000/menu_attr_pair_EngineStrokeType_Stroked_1_31f5b4946d.html"
        },
        {
          "name": "Rod Length",
          "values": [
            {
              "value": "5.700 in.",
              "url": "/python/html6/menu_attr_pair/1000/104000000/104276000/menu_attr_pair_RodLength_5700in_1_103f43e254.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/104000000/104276000/menu_attr_pair_RodLength_5700in_1_103f43e254.html"
        },
        {
          "name": "Piston Style",
          "values": [
            {
              "value": "Flat top, with two valve reliefs",
              "url": "/python/html6/menu_attr_pair/1000/174000000/174810000/menu_attr_pair_PistonStyle_Flattopwithtwovalvereliefs_1_45b2593bc9.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/174000000/174810000/menu_attr_pair_PistonStyle_Flattopwithtwovalvereliefs_1_45b2593bc9.html"
        },
        {
          "name": "Piston Material",
          "values": [
            {
              "value": "Forged aluminum",
              "url": "/python/html6/menu_attr_pair/1000/111000000/111645000/menu_attr_pair_PistonMaterial_Forgedaluminum_1_a2d4af50a8.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/111000000/111645000/menu_attr_pair_PistonMaterial_Forgedaluminum_1_a2d4af50a8.html"
        },
        {
          "name": "Compression Height (in )",
          "values": [
            {
              "value": "1.430 in.",
              "url": "/python/html6/menu_attr_pair/1000/215000000/215309000/menu_attr_pair_CompressionHeightin_1430in_1_38917fab11.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/215000000/215309000/menu_attr_pair_CompressionHeightin_1430in_1_38917fab11.html"
        },
        {
          "name": "Piston Head Volume (cc)",
          "values": [
            {
              "value": "+3.40cc",
              "url": "/python/html6/menu_attr_pair/1000/260000000/260019000/menu_attr_pair_PistonHeadVolumecc_340cc_1_18bc53c5be.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/260000000/260019000/menu_attr_pair_PistonHeadVolumecc_340cc_1_18bc53c5be.html"
        },
        {
          "name": "Wrist Pin Style",
          "values": [
            {
              "value": "Press-fit or floating",
              "url": "/python/html6/menu_attr_pair/1000/78000000/78277000/menu_attr_pair_WristPinStyle_Pressfitorfloating_1_f0d43bfea7.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/78000000/78277000/menu_attr_pair_WristPinStyle_Pressfitorfloating_1_f0d43bfea7.html"
        },
        {
          "name": "Wrist Pin Retainers Included",
          "values": [
            {
              "value": "Yes",
              "url": "/python/html6/menu_attr_pair/1000/210000000/210944000/menu_attr_pair_WristPinRetainersIncluded_Yes_1_80d907fcd8.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/210000000/210944000/menu_attr_pair_WristPinRetainersIncluded_Yes_1_80d907fcd8.html"
        },
        {
          "name": "Wrist Pin Included",
          "values": [
            {
              "value": "Yes",
              "url": "/python/html6/menu_attr_pair/1000/23000000/23728000/menu_attr_pair_WristPinIncluded_Yes_1_52f7c9c4eb.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/23000000/23728000/menu_attr_pair_WristPinIncluded_Yes_1_52f7c9c4eb.html"
        },
        {
          "name": "Pin Diameter (in )",
          "values": [
            {
              "value": "0.927 in.",
              "url": "/python/html6/menu_attr_pair/1000/263000000/263813000/menu_attr_pair_PinDiameterin_0927in_1_bd65463231.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/263000000/263813000/menu_attr_pair_PinDiameterin_0927in_1_bd65463231.html"
        },
        {
          "name": "Piston Ring Thickness",
          "values": [
            {
              "value": "1/16 in. x 1/16 in. x 3/16 in.",
              "url": "/python/html6/menu_attr_pair/1000/20000000/20488000/menu_attr_pair_PistonRingThickness_116inx116inx316in_1_697e26b6ca.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/20000000/20488000/menu_attr_pair_PistonRingThickness_116inx116inx316in_1_697e26b6ca.html"
        },
        {
          "name": "File Fit",
          "values": [
            {
              "value": "No",
              "url": "/python/html6/menu_attr_pair/1000/25000000/25397000/menu_attr_pair_FileFit_No_1_b6534832de.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/25000000/25397000/menu_attr_pair_FileFit_No_1_b6534832de.html"
        },
        {
          "name": "Gapless",
          "values": [
            {
              "value": "No",
              "url": "/python/html6/menu_attr_pair/1000/111000000/111773000/menu_attr_pair_Gapless_No_1_71c4c1283c.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/111000000/111773000/menu_attr_pair_Gapless_No_1_71c4c1283c.html"
        },
        {
          "name": "Quantity",
          "values": [
            {
              "value": "Sold as a set of 8.",
              "url": "/python/html6/menu_attr_pair/1000/230000000/230938000/menu_attr_pair_Quantity_Soldasasetof8_1_0700962fac.html"
            }
          ],
          "name_url": "/python/html6/menu_attr_pair/1000/230000000/230938000/menu_attr_pair_Quantity_Soldasasetof8_1_0700962fac.html"
        }
      ],
      "images": [],
      "distributors": [
        {
          "name": "Summit Racing",
          "sku": "SLP-L2491NF40",
          "url": "https://www.summitracing.com/parts/SLP-L2491NF40/media/video/",
          "pricing": [
            {
              "quantity": 1,
              "price_usd": 641.99
            }
          ],
          "stock": {
            "available": false,
            "quantity": null,
            "lead_time_days": null
          },
          "moq": 1,
          "multiple": 1,
          "image": "https://www.dataalchemy.com/python/getu/660f39cd-6632-4a51-b7b3-2154efcb59bd"
        }
      ],
      "amazon": {
        "available": false,
        "products": []
      },
      "metadata": {
        "generated_date": "2026-09-15",
        "last_updated": "2026-09-15",
        "data_sources": [
          "Summit Racing"
        ],
        "completeness": 0.75,
        "version": "1.2"
      }
    }
  },
  "pagination": null,
  "nav": {
    "home": "/python/html6/index.html",
    "brands": "/python/html6/menu_brand_index/menu_brand_index_brands_87101ba214.html",
    "parts": "/python/html6/menu_part_index/menu_part_index_parts_909e6bf0ca.html",
    "attributes": "/python/html6/menu_attr_index/menu_attr_index_attributes_d7f67a250d.html"
  }
}