Tomei Valve Guide Set

Valve Guide Set by Tomei. Key specs: material 5191（Cn-Sn-P alloy）. Valves are usually replaced during a cylinder head rebuild, along with guides, seals and a valve job.

Key features

■Excessive buildup of carbon will also hinder performance and increase wear rate. When there's a small opening at the end, it will increase the carbon buildup rate as a funnel effect
■A defective seat cut. When the seat cut's centerline across the main 45 degree face is offline from the valve stems centerline by more than 0.01mm, this can cause increased abnormal wear rate
Made from 5191（Cn-Sn-P alloy）
Available in 9 engine options
Available in 3 option options

Specifications

Brand: Tomei
Part type: Valve
Material: 5191（Cn-Sn-P alloy）
Tensile strength: 590～685（Ｎ/㎜2）
Hardness: 180～230（ＨＢ）

Options

Engine: VR38DETT, RB26DETT, RB25DE(T) RB20DE(T), SR20DE(T) (R)PS13, SR20DET S14 S15, CA18DE(T), 4B11, 4G63, EJ205 EJ207 EJ255 EJ257
Option: SET, IN only, EX only

Fitment

This listing does not name specific vehicles. Match the part number and the specifications with the part you are replacing.

OE and interchange numbers

TA309C-NS01A, TA309D-NS01A

What it does

Burned or bent valves cause misfires and low compression. Guides that wear let valves wobble and burn oil. Using the correct part for your exact engine keeps oil pressure, sealing and timing where the engine was designed to run, and doing related parts at the same time saves taking it apart twice.

Installation & tips

Have the valve seats cut or lapped so the new valves seal fully.
Valve stem seals: Always new with new valves.
Head gasket: The head comes off for this job.
Put the new part next to the old one and compare the shape, mounting points and connections before you install it.
Work on a cool engine with the vehicle secured, and use a service manual for your vehicle for torque specs and procedures.

FAQ

What is the valve guide set made of?
The listing gives the material as 5191（Cn-Sn-P alloy）.

Can I install it myself?
Many owners do this job at home with basic tools and a service manual for their vehicle. If you are not sure, have it fitted by a qualified mechanic.

What should I check before ordering?
Compare the part number, specifications and fitment on this page with your vehicle and with the part you are replacing.

Before you order

Measure the part you are replacing and compare it with the specifications above.

Before you order: fitment and what to plan

Intake valves let the air and fuel mixture into the cylinder; exhaust valves let the burned gases out.

Fitment notes

Specs, lead time and warranty come from Tomei and can change. The details above this guide are the latest we have.

Not sure it fits? Message us your vehicle details and we'll double-check fitment before you buy.

Ask about fitment

Plan the whole job

Valve stem seals. Always new with new valves.

Head gasket. The head comes off for this job.

Questions about engine valves

Will this fit my car?

Check the title and details above for the vehicles and part number it is listed for. If you are not sure, contact us with your year, make, model, engine and trim and we will confirm fitment before you order.

How do I know a valve is bad?

A compression or leak-down test shows whether a cylinder is losing pressure past a valve.

Where do specs and warranty details come from?

From Tomei. Each brand sets its own specs, lead times and warranty terms, and they can change. The product details above are the latest we have.

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Tomei Valve Guide Set