{"product_id":"manley-04-wrx-sti-ej257-size-std-stroke-79mm-bore-99-50mm-single-piston-w-rings","title":"Manley Platinum Series Pistons – 2004+ WRX STI (EJ257) Size (STD) Stroke (79mm) Bore (99.50mm ) SINGLE | 99.50mm","description":"\u003cp\u003eFor 2004+ WRX STI (EJ257) Size (STD) Stroke (79mm) Bore (99.50mm ) SINGLE short-block builds, this Platinum Series piston listing brings the applicable Manley piston grades and dimensions together while keeping each SKU selectable at the variant level. The parent listing is distinguished by \u003cstrong\u003e99.50mm\u003c\/strong\u003e, which should be cross-checked against the rest of the engine combination.\u003c\/p\u003e\u003cp\u003eBecause this is a 2004+ WRX STI (EJ257) Size (STD) Stroke (79mm) Bore (99.50mm ) SINGLE piston family, final fitment depends on the machine shop’s finished cylinder measurement and the intended rod\/stroke combination—not simply on nominal engine displacement.\u003c\/p\u003e\u003ch3\u003eKey Product Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e 2004+ WRX STI (EJ257) Size (STD) Stroke (79mm) Bore (99.50mm ) SINGLE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManley Series:\u003c\/strong\u003e Platinum Series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitle Specification:\u003c\/strong\u003e 99.50mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Family Detail:\u003c\/strong\u003e 2618-alloy forged piston construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Family Detail:\u003c\/strong\u003e tool-steel wrist-pin hardware on applicable part numbers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Family Detail:\u003c\/strong\u003e moly skirt coating on applicable part numbers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Numbers:\u003c\/strong\u003e Vary by selected configuration (2 SKUs in this parent family)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAvailable Configurations\u003c\/h3\u003e\u003cp\u003eThis parent listing contains multiple selectable Manley SKUs. Choose the configuration that matches the measured engine or cylinder-head specification.\u003c\/p\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003ePiston Grade:\u003c\/strong\u003e B, A\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003ePackage Quantity\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSold individually.\u003c\/strong\u003e This listing supplies one piston per selected SKU; order the quantity required for your engine and verify that all pistons match the machine shop’s bore\/grade plan. This quantity applies to the selected Manley SKU family shown on this product page.\u003c\/p\u003e\u003ch3\u003eSelection \u0026amp; Fitment Notes\u003c\/h3\u003e\u003cp\u003eConfirm finished bore size, required piston grade, compression ratio, compression height, pin specification, ring package, and piston-to-wall clearance with your machine shop or engine builder.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eProfessional engine assembly and measurement are recommended. Product specifications should be confirmed against the selected Manley part number and the requirements of the exact engine build.\u003c\/em\u003e\u003c\/p\u003e","brand":"Manley Performance","offers":[{"title":"B","offer_id":50206930600186,"sku":"MAN612000CB-1","price":199.61,"currency_code":"USD","in_stock":true},{"title":"A","offer_id":50206930632954,"sku":"MAN612000CA-1","price":199.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0325\/6352\/7739\/files\/dbd10492df38f4fae4e7da233e317ae3L_895e6ced-97e5-4e43-ac3e-590ad2e0f7fd.jpg?v=1787979469","url":"https:\/\/lgcracing.com\/products\/manley-04-wrx-sti-ej257-size-std-stroke-79mm-bore-99-50mm-single-piston-w-rings","provider":"Legacy Racing","version":"1.0","type":"link"}