Engines and Components Camshafts and Valvetrain

Tomei

VALVE SPRING SEAT SET RB SERIES 0.5mm 8pcs

$25.10

SKU: T00F TA305A-NS05C

In Stock
In Stock
Ships by Jun 18
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Tomei TA305A-NS05C is a set of 8 valve spring seats, each with a thickness of 0.5mm. They are used to adjust the load applied to valve springs to ensure uniform specifications.

Utilizing these spring seats allows for precise adjustment of spring load, similar to the "blueprinting" process used by engine builders, but at a fraction of the cost. This procedure is essential for race engines to achieve higher RPMs without hesitation or power loss.

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandTomei
Part NumberT00F TA305A-NS05C

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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