{"product_id":"supertech-dual-valve-spring-kit-spr-ts1015-su4-subaru-wrx-sti-ej-turbo-dohc-16v","title":"Supertech Dual Valve Spring Kit SPR-TS1015\/SU4 - Subaru WRX\/STi EJ Turbo DOHC 16V","description":"\u003cp\u003eSupertech part number SPRK-TS1015-SU4.\u003c\/p\u003e\u003ch3\u003eFitment \/ specs\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSupertech chart: SPR-TS1015\/SU4 dual springs for EJ20\/EJ25 WRX\/STi turbo DOHC — seat ~82 lbs @ 34.25mm, open ~220 @ 11.5mm lift; max net lift ~12.5mm; coil bind 20.70mm.\u003c\/li\u003e\n\u003cli\u003eKit as supplied (SPRK-TS1015-SU4). Use with matching Supertech retainers\/seats (RET-TS60\/WRX1 + SEAT-TS\/SUB4 per chart — OEM seats not used).\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBrand: Supertech\u003c\/li\u003e\n\u003cli\u003ePart number: SPRK-TS1015-SU4\u003c\/li\u003e\n\u003cli\u003eCategory: Engine Components \/ Valve Springs, Retainers\u003c\/li\u003e\n\u003cli\u003eShipping weight: 2.6 lb\u003c\/li\u003e\n\u003cli\u003eLive T14 stock at check: qty 1 (1 PA|0 TX|0 IN|0 NV)\u003c\/li\u003e\n\u003cli\u003ePrice basis: MAP\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSources: manufacturer\/dealer application charts checked 2026-11-06 America\/Detroit.\u003c\/p\u003e","brand":"Supertech","offers":[{"title":"Default Title","offer_id":48640417890502,"sku":"SPRK-TS1015-SU4","price":585.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/1462\/6758\/files\/a7aac4e315d1269ad624eb2d6c15c7f6_98464b77-fc0b-4b0f-9b76-e5b16c681dee.png?v=1793998208","url":"https:\/\/subishop.com\/products\/supertech-dual-valve-spring-kit-spr-ts1015-su4-subaru-wrx-sti-ej-turbo-dohc-16v","provider":"SubiShop.com","version":"1.0","type":"link"}