Description: Brand New Supertech Performance +0.5mm OverSize Intake Valves Fits 1992-2005 Honda Civic D15B, D16Y7, D16Y8, D16Z6, D17A - VTEC SOHC Engines. Only the best materials are used in the creation of Supertech Performance valves, ready to handle whatever abuse you can throw at them. Perfect for forced induction applications and high revving naturally aspirated applications. Complete Set of 8 Intake Valves Supertech Part # HIVN-1002 - Intake - +0.5mm Over Size - Dished Face - Intake Valve Specs - 30.50mm Head Diameter - 5.48mm Stem Diameter - 118.50mm Length Black Nitride Valves- The micro hardness is higher than the stainless steel base material, keeping good ductility beneath the hard nitride layer (micro hardness is 800hv minimum) - Surface finish is smoother than with chromed valve stems, having less friction between the stem and guide. - Valve seat surface is harder with the nitride layer, lasting longer with lead free fuels, alcohols, nitro or other "explosive" mixes. Matches any kind of seats (nodular iron seats, steel powder metal seats, hard aluminum-copper seats or beryllium copper seats). - Higher RPM engines take full advantage of all previous features. The higher the engine speed the bigger the power loss due to internal engine friction! The black nitride layer reduces this power loss due to less valve-guide friction. - The nitride layer is adhered to the base material at microscopic level, so it will not "flake" or brake when the valves bend due to impacts with the pistons. - The Black Nitride applies to the whole valve while the chrome coating is only applied to the stem. - All valves are swirl polished, have stem undercut, a hardened tip, and more. 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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