Brand New Supertech Performance Oversize Valves, Dual Valve Springs, Titanium Retainer Set Fits:
Toyota Corolla 4AGE 16v Engines
Supertech Valves:
Includes: Complete Set of 16 Valves (8 Intake and 8 Exhaust Valves)
Supertech Part # TIVN-1020 - Intake - +1.5mm Oversize - Dished Face
Intake Valve Specs - 32.0mm Head Diameter - 5.98mm Stem Diameter - 99.60mm Length
Supertech Part # TEVN-1020 - Exhaust - +2.0mm Oversize - Dished Face
Exhaust Valve Specs - 27.50mm Head Diameter - 5.97mm Stem Diameter - 99.75mm Length
Supertech Dual Valve Springs:
Includes: Complete Set of 16 Dual Valve Springs, Titanium Retainers, Spring Bases, Valve Seals, and Valve Guides
SPRK-TC25D
Outer Spring - 25.0mm OD - 18.0mm ID
Inner Spring - 18.0mm OD - 13.0mm ID
73 lb seat pressure @ 35.40mm
14.40mm Max Net Lift
21.0 / 17.0mm Coil Bind
12.60 lbs/mm Rate
- 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.
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. Be sure to check out our other great items, we do combine shipping costs. (One shipping cost based on total package weight)