{"product_id":"massive-speed-valve-spring-and-titanium-retainer-kit-miata-2-5-swap-duratec-mzr","title":"Massive Speed Valve Spring and Titanium Retainer Kit - Miata 2.5 Swap (Duratec \/ MZR)","description":"\u003cp\u003eHigh Lift Valvetrain kit includes high rate springs and lightweight titanium retainers for maximum performance. A must for high boost, higher lift cams and high RPM use.\u003c\/p\u003e\n\u003cp\u003eDuratec Set - Compatible with 2.0 2.3 2.5 Ford Duratec \/ Mazda MZR \/ Ford Ecoboost Engines Found in Ford Focus Escape Ranger Mustang Bronco Fusion Transit Connect Cmax etc ete - Mazda 3 5 6 MS3 6 Mazdaspeed CX-7 \u003c\/p\u003e\n\u003cp\u003eChromium Silicon Spring material improves fatigue life\u003c\/p\u003e\n\u003cp\u003e6AL4V Titanium retainers turned in house.  7 Degree lock taper\u003c\/p\u003e\n\u003cp\u003eMuch lighter than kits that use steel \/ oem retainer\u003c\/p\u003e\n\u003cp\u003eDuratec Specs:  Spring Pressure: Seat: 1.400\" @ 66 lbs \/ Nose: 1.000 \" @161 lbs \/ Coil Bind: 0.860\"\u003c\/p\u003e\n\u003ch6\u003eDuratec \/ MZR \/ Ecoboost I4 2.0 2.3 2. 5\u003cbr\u003e\n\u003c\/h6\u003e\n\u003ch6\u003eZetec 2.0  (not for SVT - see our Cat cams springs\/retainers for that application) \u003cbr\u003e\n\u003c\/h6\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Massive Speed","offers":[{"title":"Default Title","offer_id":67969024819399,"sku":"NM-D5F257","price":357.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/3659\/5143\/files\/massive-speed-valve-springs-titanium-retainers-kit.jpg?v=1792543445","url":"https:\/\/www.nappmotorsports.com\/products\/massive-speed-valve-spring-and-titanium-retainer-kit-miata-2-5-swap-duratec-mzr","provider":"Napp Motorsports","version":"1.0","type":"link"}