{"product_id":"arp-head-stud-kit-12pt-for-2013-2021-subaru-wrx-brz-toyota-86-2-0l-fa20f-fa20d","title":"ARP Head Stud Kit 12pt For 2013-2021 Subaru WRX\/BRZ \u0026 Toyota 86 2.0L FA20F\/FA20D","description":"\u003cp\u003eARP uses a premium grade 8740 alloy that is rated far superior to \"aircraft\" quality. Each stud is placed vertically in special racks and precisely heat-treated to 190,000 psi, ensuring complete heat penetration. Following heat-treat, each stud is centerless ground to make it as close to perfectly concentric as possible. This procedure involves about ten very slight cuts and results in an exceptionally straight part.\u003c\/p\u003e\n\u003cp\u003eARP studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned. ARP studs are thread rolled after heat-treat, which gives them about 1000% (that's ten times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice). It costs a lot more to do it this way because it's tough on tooling, but the results are well worth the extra effort. Premium quality parallel ground washers are also included with each kit. ARP head studs are a must for performance engines seeing increased boost, and they are truly the best on the market for your WRX or BRZ.\u003c\/p\u003e\n\u003cdiv id=\"gmail-description\"\u003e\n\u003cdiv id=\"gmail-descriptioncontent\"\u003e\n\u003cdiv\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003ePremium 8740 alloy steel delivers superior strength\u003c\/li\u003e\n\u003cli\u003eHeat-treated to 190,000 psi for extreme durability\u003c\/li\u003e\n\u003cli\u003eThread rolled after heat treat for 10x fatigue life\u003c\/li\u003e\n\u003cli\u003eCenterless ground studs ensure perfect concentricity\u003c\/li\u003e\n\u003cli\u003e12-point chromoly nuts with black oxide finish\u003c\/li\u003e\n\u003cli\u003eIncludes parallel-ground washers for precise fit\u003c\/li\u003e\n\u003cli\u003eDesigned for Subaru FA20 DOHC 2.0L flat-four engine\u003c\/li\u003e\n\u003cli\u003eReusable studs ideal for high-boost performance builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFastener Style: Stud\u003c\/li\u003e\n\u003cli\u003eUndercut Stud: No\u003c\/li\u003e\n\u003cli\u003eHead Style: 12-point\u003c\/li\u003e\n\u003cli\u003eFastener Material: ARP2000\u003c\/li\u003e\n\u003cli\u003eFastener Color: Black\u003c\/li\u003e\n\u003cli\u003eWashers Included: Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(1) ARP Head Stud Kit \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e2015-2021 Subaru WRX (FA20F)\u003c\/li\u003e\n\u003cli\u003e2013-2020 Subaru BRZ (FA20D)\u003c\/li\u003e\n\u003cli\u003e2017-2019 Toyota 86\/GT\u003c\/li\u003e\n\u003cli\u003e2013-2016 Scion FR-S\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eLifetime Warranty  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":46659202154653,"sku":"260-4301","price":284.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0645\/2504\/1821\/files\/Screenshot2025-04-09102651.png?v=1744210253","url":"https:\/\/rudysdiesel.com\/products\/arp-head-stud-kit-12pt-for-2013-2021-subaru-wrx-brz-toyota-86-2-0l-fa20f-fa20d","provider":"Rudy's Performance Parts","version":"1.0","type":"link"}