Description: Supertech Performance Dual Valve Springs and Titanium Retainers Kit fits Opel / Vauxhall / GM Z20LET, Z20LEH, X20XEV Engines - 75lb SPRK-TS1015-Z20 - Supertech Dual Valve Springs - 75 lb Seat Pressure Outer Spring - 27.50mm OD - 20.0mm ID Inner Spring - 20.0mm OD - 15.20mm ID 75 lb seat pressure @ 35.10mm 14.40mm Max Net Lift 20.70mm Coil Bind 12.10 lbs/mm Rate Will Fit Opel / Vauxhall / GM Ecotec - Astra, Speedster, Zafira - Z20LET, Z20LEH, X20XEV Engines. Complete set of 16 Dual Valve Springs, 16 Titanium Retainer's, and Seat's This Package Includes: Supertech Performance Dual Valve Springs # SPR-TS1015-Z20, Supertech Retainer part # RET-TS55/T5, and Seat part # SEAT-TS-Z20. Supertech Performance Dual Valve Springs are made with premium Super Clean Chrome Silicon Vanadium Steel alloy for higher performance and durability at high rpms and better memory. Computer designed to ensure that wire stress levels do not overpass the limits of stress defined in the diagrams of fatigue for long durability under extreme conditions. Computer software also allows us to make sure that the harmonics are well under control. Titanium Retainers are manufactured with high quality military certified Titanium alloy, CNC machined for tight that will ensure long term durability. Supertech Performance is best known for high performance valves, and valvetrain components. With over 30 years of experience Supertech performance has been providing the racing market with first class parts for every type of racing application. Whether it is Drag Racing, IRL, Rally, Road Racing or any other motorsport for that matter, Supertech Performance has the perfect performance solution for your application. Please ask any questions you may have. We are always here to help and respond to inquiries in a quick, timely manner. Be sure to check out our other great items, we do combine shipping costs. (One shipping cost based on total package weight) Shipping Policy: We strive to ship your order in a prompt manner to meet the criteria for shipping time that we specify in the Item information. We offer a variety of shipping options based on what product you are purchasing and your desired time frame for delivery to meet the needs of all of our customers. Shipping charges are non-refundable. We will gladly combine shipping charges to one charged based on the total weight of the package. We proudly ship packages worldwide !!! Return Policy: We always look to satisfy our customers in whatever needs they may have. Returns are accepted within 14 business days of receiving the product. A 15% restocking fee may apply to your return, please contact us for details. Items must be in New condition with Original Packaging intact to be returned. Shipping charges are non-refundable. IPGparts has been in business for 15 years servicing the Automotive Performance Industry. We are proud to bring you fair prices on the top parts available for the automotive performance industry. Working closely with many of the top business names in the industry and located in Orlando, FL we are a full product support facility with the ability to obtain any product that you have in mind. We have the experience and know how to guide you in the right direction for your parts purchases as you build your high performance automobile. Our racing programs offer us the chance to test and use quality products on the market to further develop and ultimately allow us to give real world feedback on the hottest and most useful products. The parts you see offered for sale are the best of the best. We don't just sell parts to maintain the business, we sell the parts that will help you perform better and WIN !!! * Some images being used are just for representation purposes and may not reflect the actual product you receive... ...but the product you receive will be specifically for your application as listed in the description * *Florida residents please add sales tax.*
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