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Engines and Components› Camshafts and Valvetrain

Tomei

Valve Spring Seat Set

$11.00 $9.90 Save $1.10

SKU: TA305A-NS05C

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Tomei Valve Spring Seat Set is a set of 8 pieces designed to adjust valve spring load. This is crucial when installing aftermarket valve springs to ensure uniform specification and allow for higher engine RPM without hesitation. Utilizing these spring seats of various thicknesses helps achieve the same objective as more costly engine blueprinting processes.
Show original supplier description
The Tomei Valve Spring Seat Set is a collection of 8 individual seats, each precisely manufactured to a 0.5mm thickness, designed for the RB engine series. When installing aftermarket valve springs, adjusting the load applied to each spring is a critical step to achieve uniform specifications across the entire assembly. This process is essential for race engines aiming to increase RPM limits safely and effectively. Standard engine building procedures like 'blueprinting' can be time-consuming and expensive. Tomei's valve spring seats offer a cost-effective solution by allowing precise adjustment of spring load through their various available thicknesses. This ensures that all components are balanced, preventing potential issues such as valve float or hesitation at higher RPMs. All Tomei Powered race engines are reportedly fitted and tuned with these valve spring seats to guarantee uniform specifications. Without proper spring load adjustments, valve springs can surge, leading to sticky performance under load and significant power loss. In severe cases, improper load can even lead to component disengagement, causing severe engine damage. This set, specifically the TA305A-NS05C, is designed for the Nissan RB engine series and comes with 8 pieces per set, providing the necessary components for a complete head assembly.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandTomei
Part NumberTA305A-NS05C
CategoryEngines and Components

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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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