{"product_id":"bk-racing-spring-seats-and-valve-seals-extra-clearance","title":"GM Ecotec Extra Clearance Spring Seats \u0026 Viton Valve Seals – High Lift Upgrade","description":"\u003cp class=\"p1\"\u003eBK Racing Extra Clearance Spring Seats and High Performance Viton Valve Seals were developed to increase installed height and valve lift capability when paired with \u003ca href=\"https:\/\/bkracing.com\/products\/83-valve-spring?_pos=1\u0026amp;_sid=2b5159d93\u0026amp;_ss=r\" target=\"_blank\" title=\"83lb Valve Springs \" rel=\"noopener\"\u003eBK Racing 83lb valve springs\u003c\/a\u003e. Factory integrated Ecotec spring seats limit available lift and installed height, especially in aggressive high RPM camshaft applications where additional spring travel and retainer clearance become critical.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThis upgrade replaces the factory integrated spring seat arrangement with hardened spring steel seats and high temperature press-on Viton valve seals designed to provide additional installed height while maintaining practical drop-in compatibility for many Ecotec cylinder heads.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe increased installed height reduces seat pressure slightly while significantly increasing available lift clearance and improving valvetrain stability in aggressive racing combinations.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eWhen combined with \u003ca href=\"https:\/\/bkracing.com\/products\/titanium-retainers?_pos=1\u0026amp;_sid=56a23ba20\u0026amp;_ss=r\" target=\"_blank\" title=\"Titanium Retainers \" rel=\"noopener\"\u003eBK Racing titanium retainers\u003c\/a\u003e and 83lb valve springs, this package helps support sustained RPM operation commonly seen in circle track, drag racing, turbocharged, and endurance Ecotec applications.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003ePerformance Specifications\u003cbr\u003e(Approximate — always verify installed measurements during assembly)\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e• Installed Height: 1.365”\u003cbr\u003e• Net Installed Height Increase: Approximately +0.040”\u003cbr\u003e• Seat Pressure: Approximately 71 lb\u003cbr\u003e• Open Pressure: Approximately 218 lb @ 0.500” lift\u003cbr\u003e• Maximum Recommended Lift: Approximately 0.555”\u003cbr\u003e• Spring Rate: Approximately 294 lb\/in progressive\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eKit Includes\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e• 16 hardened spring steel seat shims\u003cbr\u003e• 16 high-temperature Viton press-on valve seals\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eWhy Additional Installed Height Matters\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eAs valve lift and engine RPM increase, available retainer-to-seal clearance becomes increasingly important for maintaining valvetrain stability and preventing mechanical interference. Additional installed height helps increase available spring travel and lift capacity while reducing excessive spring loading commonly associated with aggressive camshaft combinations.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThis allows builders to safely run more aggressive cam profiles while improving overall valvetrain control in high RPM Ecotec applications.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eIdeal Applications\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e• High RPM naturally aspirated builds\u003cbr\u003e• Aggressive aftermarket camshafts\u003cbr\u003e• Circle track racing\u003cbr\u003e• Turbocharged Ecotec engines\u003cbr\u003e• Sustained RPM operation\u003cbr\u003e• High lift racing combinations\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThese spring seats and valve seals were developed specifically around BK Racing 83lb valve spring combinations and are commonly paired with BK Racing titanium retainers and Solid Lash Adjusters for maximum high RPM valvetrain stability.\u003c\/p\u003e","brand":"BK Racing","offers":[{"title":"Default Title","offer_id":43746344435800,"sku":null,"price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/9997\/9864\/files\/IMG_5121.jpg?v=1774627529","url":"https:\/\/bkracing.com\/products\/bk-racing-spring-seats-and-valve-seals-extra-clearance","provider":"BK Racing","version":"1.0","type":"link"}