Supertech Part # BMIVN-1031S - Intake - STD Size - Dished Face - Single Groove. Intake Valve Specs - 34.0mm Head Diameter - 5.97mm Stem Diameter - 106.10mm Length. Supertech Part # BMEVI-1031S - Exhaust - STD Size - Dished Face - Inconel - Single Groove.Exhaust Valve Specs - 31.50mm Head Diameter - 5.96mm Stem Diameter - 105.65mm Length. Keepers - KPR-6S/7 - Single Groove.
Includes: Complete Set of 24 Dual Valve Springs, Titanium Retainers, and Seats. Outer Spring - 29.65mm OD - 21.85mm ID. Inner Spring - 20.50mm OD - 15.50mm ID. 14.50mm Max Net Lift. 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. These valves are manufactured from a Nickel base super alloy material (Inconel 751 or Nimonic 80A) this material is chosen because it is designed to withstand very high temperatures. These valves feature a one-piece forging, hardened tip, and our superfinish stem. Depending on the application these valves come back cut, undercut, flat or dished. Our Inconel valves are extremely popular choice for high boost turbocharged applications.
We offer a full line of high performance auto parts. Valve Springs and Titanium Retainers.
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. IPG has been 3 years in business but offers 8+ years of market experience. 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. 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..
The item "Supertech +1mm Valves 80lb Dual Springs Ti Retainers Fits BMW M50 S50 M52 M54" is in sale since Wednesday, November 29, 2017. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Valves & Parts". The seller is "ipgparts" and is located in Sanford, Florida. This item can be shipped worldwide.