{"product_id":"diamond-pistons-36015-4-piston-kit-ej257-wrx-sti-12cc-1-208-ch-79mm-stroke","title":"Diamond Pistons piston kit, EJ257 (WRX STI), -12cc, 1.208 in. compression height, 79mm stroke","description":"\u003cp\u003e\u003cstrong\u003eEvery set is built to order. Please allow five weeks for it to ship.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDiamond Pistons forged piston kit for the EJ257 (WRX STI), set of 4. ASF Machine orders these direct from Diamond for your build (not a stocked item). Diamond builds its sport compact pistons from forged 2618 aluminum, CNC-machines them, and pairs them with Trend Performance wrist pins.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePiston volume: -12cc; compression height: 1.208 in.\u003c\/li\u003e\n\u003cli\u003eStroke: 79mm; rod length: 5.137 in.\u003c\/li\u003e\n\u003cli\u003eRing set: 1.20 mm x 1.20 mm x 2.00 mm\u003c\/li\u003e\n\u003cli\u003eWrist pin: 0.905 in. OD x 2.500 in. long\u003c\/li\u003e\n\u003cli\u003eValve pocket depth: 0.220 in. intake, 0.220 in. exhaust\u003c\/li\u003e\n\u003cli\u003eForging: full round\u003c\/li\u003e\n\u003cli\u003eRings, wrist pins and pin retainers included (per Diamond)\u003c\/li\u003e\n\u003cli\u003ePer Diamond: pin oiling fed from the oil ring, pins fitted to the pistons, 3D-machined valve pockets, moly-coated skirts, wrist pins, locks and (where needed) oil-ring support rails included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDiamond part numbers:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e36015-4: 99.5mm bore, standard pin, 9.00:1 compression (per Diamond), ring set 09513917, wrist pin G9052500180SC\u003c\/li\u003e\n\u003cli\u003e36015-4-H: 99.5mm bore, H13 pin, 9.00:1 compression (per Diamond), ring set 09513917, wrist pin H9052500225SC\u003c\/li\u003e\n\u003cli\u003e36016-4: 99.75mm bore, standard pin, 9.10:1 compression (per Diamond), ring set 09513927, wrist pin G9052500180SC\u003c\/li\u003e\n\u003cli\u003e36016-4-H: 99.75mm bore, H13 pin, 9.10:1 compression (per Diamond), ring set 09513927, wrist pin H9052500225SC\u003c\/li\u003e\n\u003cli\u003e36017-4: 100mm bore, standard pin, 9.10:1 compression (per Diamond), ring set 09513937, wrist pin G9052500180SC\u003c\/li\u003e\n\u003cli\u003e36017-4-H: 100mm bore, H13 pin, 9.10:1 compression (per Diamond), ring set 09513937, wrist pin H9052500225SC\u003c\/li\u003e\n\u003cli\u003e36018-4: 100.5mm bore, standard pin, 9.20:1 compression (per Diamond), ring set 09513957, wrist pin G9052500180SC\u003c\/li\u003e\n\u003cli\u003e36018-4-H: 100.5mm bore, H13 pin, 9.20:1 compression (per Diamond), ring set 09513957, wrist pin H9052500225SC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecs and fitment:\u003c\/strong\u003e Piston kit, set of 4. -12cc, 1.208 in. compression height, 79mm stroke. Fits Subaru EJ257 (WRX STI). Ordered direct from Diamond Pistons; call 970-242-0919 to confirm fitment and lead time for your build.\u003c\/p\u003e","brand":"Diamond Pistons","offers":[{"title":"99.5mm \/ Standard pin","offer_id":48080082632881,"sku":"36015-4","price":779.28,"currency_code":"USD","in_stock":true},{"title":"99.5mm \/ H13 pin","offer_id":48080082665649,"sku":"36015-4-H","price":848.62,"currency_code":"USD","in_stock":true},{"title":"99.75mm \/ Standard pin","offer_id":48080082698417,"sku":"36016-4","price":779.28,"currency_code":"USD","in_stock":true},{"title":"99.75mm \/ H13 pin","offer_id":48080082731185,"sku":"36016-4-H","price":848.62,"currency_code":"USD","in_stock":true},{"title":"100mm \/ Standard pin","offer_id":48080082763953,"sku":"36017-4","price":779.28,"currency_code":"USD","in_stock":true},{"title":"100mm \/ H13 pin","offer_id":48080082796721,"sku":"36017-4-H","price":848.62,"currency_code":"USD","in_stock":true},{"title":"100.5mm \/ Standard pin","offer_id":48080082829489,"sku":"36018-4","price":779.28,"currency_code":"USD","in_stock":true},{"title":"100.5mm \/ H13 pin","offer_id":48080082862257,"sku":"36018-4-H","price":848.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/6044\/7153\/files\/diamond-36011-ANG135_be33bc1e-f4f7-438f-84c9-33500b3a2bb5.jpg?v=1792715948","url":"https:\/\/asfmachine.com\/products\/diamond-pistons-36015-4-piston-kit-ej257-wrx-sti-12cc-1-208-ch-79mm-stroke","provider":"ASF Machine","version":"1.0","type":"link"}