TOMEI VALVE SPRING SEAT SET SR20 SERIES 0.5mm 8pcs
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Tomei
TOM TA305A-NS08C
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When installing aftermarket valve springs in a head assembly, the amount of load applied to each spring need to be adjusted until everything is in uniform specification. This is a standard procedure which all race engines go through in order to be able to raise the engine RPM without any glitches or hesitation. The standard method involved when putting together the valve assembly is to fully balance all the added components to tighter clearances than the manufacturer specifications. This method called “blueprinting” can be time consuming and a very costly service performed by an experienced engine builder. By utilizing the various thickness of the spring seats to adjust to each and different spring rate load, the same objective can be satisfied with fraction of the cost. All of Tomei Powered’s complete race engines are fitted and tuned with these valve spring seats to ensure uniform specification for all areas that are necessary.
Ettects without spring load adjustments
*Initially the valve springs begin to surge, becoming very sticky under loads. This leads to ample power loss but in worst case scenarios, the cotter pin may disengage from its assembly applying major damage to the engine.
Example
When installing Tomei Type A valve springs in an RB26 and performing a three angle valve job, the stock spring load spec of 24kg is decreased to less than 20kg. By installing the Tomei Valve Spring Seats, the spring load can be brought back to tolerance to the 24kg range, enabling the engine to rev freely once again.
Returns Policy
--PLEASE NOTE: MOST ORDERS ARE SUBJECT TO RESTOCK OR CANCELATION FEE. PLEASE CALL OUR OFFICE FOR DETAILS AND EXCEPTIONS-- You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
