{"product_id":"kibblewhite-valve-spring-kit-for-honda-0-450-inch-lift-part-number-30-4021","title":"Kibblewhite Valve Spring Kit for Honda, 0.450-Inch Lift (30-4021)","description":"\u003cp\u003eUpgrade your Honda valvetrain with the Kibblewhite Valve Spring Kit, Part Number 30-4021. Designed for boosted and turbocharged applications, this performance-oriented kit supports engines using high-performance camshafts with lift up to 0.450 inch. It is engineered to provide increased spring rates and greater high-lift compatibility than stock valve springs, helping maintain dependable valve control in demanding operating conditions.\u003cbr\u003eThe Kibblewhite 30-4021 kit combines Cr-Si (chromium silicon) alloy dual valve springs with precision CNC-machined retainers. Depending on the application configuration, the retainers are produced from titanium or heat-treated steel to deliver the strength and durability required for elevated engine speeds. The dual-spring design helps improve valvetrain stability at high RPM while supporting performance engine builds that require greater control than factory components can provide.\u003cbr\u003eFeature: Application compatibility for boosted and turbocharged Honda engines. Feature: Supports camshafts with up to 0.450-inch valve lift. Feature: Increased spring rates compared with stock valve springs. Feature: High-lift compatibility for performance camshaft applications. Feature: Cr-Si chromium silicon alloy dual springs for improved high-RPM valvetrain control. Feature: CNC-machined titanium or heat-treated steel retainers for durable performance. Feature: Made in the USA. The Kibblewhite Valve Spring Kit is a practical choice for engine builders seeking upgraded valvetrain control and reliable component performance in high-output Honda applications.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eCompatible with boosted or turbocharged Honda applications\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSupports camshafts with up to 0.450-inch valve lift\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eIncreased spring rates compared with stock valve springs\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHigh-lift compatibility for performance camshafts\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCr-Si chromium silicon alloy dual springs provide high-RPM valvetrain control\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCNC-machined titanium or heat-treated steel retainers\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMade in the USA\u003c\/li\u003e\u003c\/ul\u003e\r\n\u003cp\u003eShips from Parts Unlimited.\u003c\/p\u003e","brand":"Kibblewhite","offers":[{"title":"Default Title","offer_id":60117915894046,"sku":"30-4021","price":82.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/7884\/7518\/files\/104046.png?v=1791117270","url":"https:\/\/shoplepier.com\/products\/kibblewhite-valve-spring-kit-for-honda-0-450-inch-lift-part-number-30-4021","provider":"LEPIER POWERSPORTS","version":"1.0","type":"link"}