New Supertech Performance SS 1mm Oversize Valves

12 Intake and 8 Exhaust

Toyota Corolla 4AGE 20v Engines

12-Intake Valves -- Black Nitrite Coated SS   (TIVN-1018) 27.5mm

8-Exhaust Valves -- Black Nitrite Coated SS  (TEVN-1018) 27.0mm

Fits:

• Toyota 4AGE 20V 1.6L Engines.
  

STAINLESS STEEL ALLOYS:
Made as a one piece forged valve for higher strength and reliability.
Supertech uses mostly EV8 (21-4N) for Intake and Exhaust valves but there are other alloys that they use along with different heat treatments to manufacture valves for different applications. 
Other hard metal alloys may be welded to harden certain areas like the tips or seats.

Black Nitride Coating:

• The micro hardness is higher than the stainless steel base material, keeping good ductility beneath the hard nitrided layer (micro hardness is 800HV minimum)
• Surface finish is smoother than with chromed stems, having less friction between the stem and guide.
• Valve seat surface is harder with the nitrated 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 the 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 nitrided layer is adhered to the base material at a microscopic level, so it will not "flake" or bake 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.

Here and Nippon Racing we run Supertech Valvetrain Components in all of our engine builds.  Supertech has proven themselves in all facets of motorsports, ranging from stock engine rebuilds to 1000+ HP 24-Hour race builds.  Trust Supertech Components for all your engine builds and enjoy a lifetime of performance and reliability.

Pay Pal:
All Pay Pal payments accepted will be shipped to the confirmed Pay Pal address only. 

Cashier's Checks:
Cashiers checks will be accepted.
With the payment, please list your eBay item number, your return shipping information and the sizes that you would like the parts to be if applicable. 

Payment Terms:
Auctions must be paid for within 14 days of the auction end or a Non Paying Bidder Alert will be filed with eBay.

Combined Shipping:
Shipping:
Buyer will pay All Shipping and Handling charges. Shipping will be either USPS priority mail or UPS ground.

Most items we sell can be combined with other items for shipping. Some items due to weight and size can not be combined with others. Please email us for combined shipping prices before you check out thru eBay and we will combine the invoice for you. 

International shipping:
All international packages will be shipped via USPS EMS (Express Mail Shipping). 

Package Tracking:
All packages come with online tracking. Customers who have paid with Pay Pal will receive a tracking number from Pay Pal upon shipment as well as from our selected carrier. Payments received by other methods will receive a confirmation email only if you have provided an email address with your payment. Please understand that in some cases the packages are not scanned immediately by the carrier and the tracking information may not be immediately available on their respective websites. Please allow 24 hours from the receipt of the email confirmation for the carrier to scan the package into their system.