SKU: 43998630938

Tomei Valve Guide Set

Sale price$194.40 Regular price$216.00
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Ships within 48 hours · Estimated delivery Aug 19 - Aug 24

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Description

Tomei Valve Guide SetTomei Valve Guide Set Material: 5191Cn Sn P alloy Tensile strength: 590685 2 Hardness: 180230 Made from Phosphor Bronze (PBB) APPLICATION IN EX PART NO. VR38DETT SET TA309A NS01A IN Only TA309C NS01A EX Only TA309D NS01A RB26DETT SET TA309A NS05A IN Only TA309C NS05A EX Only TA309D NS05A RB25DE(T) RB20DE(T) SET TA309A NS06A IN Only TA309C NS05A EX Only TA309D NS06A SR20DE(T) (R)PS13 SET TA309A NS08A IN Only TA309B NS08A EX Only TA309D NS08A SR20DET

Tomei Valve Guide Set

Material: 5191(Cn-Sn-P alloy)

Tensile strength: 590~685(N/㎜2)

Hardness: 180~230(HB)

Made from Phosphor Bronze (PBB)

APPLICATION IN/EX PART NO.
VR38DETT SET TA309A-NS01A
IN Only TA309C-NS01A
EX Only TA309D-NS01A
RB26DETT SET TA309A-NS05A
IN Only TA309C-NS05A
EX Only TA309D-NS05A
RB25DE(T)
RB20DE(T)
SET TA309A-NS06A
IN Only TA309C-NS05A
EX Only TA309D-NS06A
SR20DE(T)
(R)PS13
SET TA309A-NS08A
IN Only TA309B-NS08A
EX Only TA309D-NS08A
SR20DET
S14,S15
SET TA309A-NS08B
IN Only TA309C-NS08A
EX Only TA309D-NS08A
CA18DE(T) SET TA309A-NS11A
IN Only TA309C-NS11A
EX Only TA309B-NS08A
4B11 SET TA309A-MT02A
IN Only TA309B-MT02A
EX Only
4G63 SET TA309A-MT01A
IN Only TA309C-MT01A
EX Only TA309D-MT01A
EJ205
EJ207
EJ255
EJ257
SET TA309A-SB01A
IN Only TA309C-SB01A
EX Only TA309D-SB01A

We chose to use Phosphor Bronze (Cn-Sn-P alloy) to make our Valve Guides, for its highly tensile and superior heat transferring ability, which is vital in high power and high RPM outputting engines. Since race engines these days require more power at higher RPM use , these engines now experience more extreme heat conditions. These conditions will increase the deterioration rate on these valve train related components. The Phosphor Bronze material has exceptionally lower friction and the best possible clearances can be maintained, which will reduce the stress on the valve train assembly, prevent seizures and cracking under high stress loads.

Still since the product will be used for extreme conditions, it will still require additional regular maintenance and periodical checks. The product can wear out faster under certain conditions. Some examples of the abnormal conditions are as follows.

■The rocker arm type assemblies will apply more lateral pressure, which will increase the wear rate. If the stem wall of the valve is rough, it will also contribute to the increased wear rate.
■Using high lift, aggressive camshafts will also increase the wear rate.
■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.
■The results from Valve Spring surging will cause the Valve to move on an angle. This will cause both ends to open up and create deformation. Then carbon can enter the valve guides more which will increase the wear rate.
■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.
■If the clearance is not within the correct 0.03-0.04mm range. The Valve will rub against the guides inner wall, this degree angle in relation to the seat cut will cause it to shift by 0.01mm more than the clearance values. The guide will take the lateral pressure point and open up the opening. The buildup of carbon will increase in the newly formed gaps.
■A worn out used Valve. It's possible to cut down by using the part that has not worn out the stem when changing to a high lift cams. The guides can wear out when the inappropriate clearances are made. (About 0.01mm out of clearance).
■The Valve design is defective. The difference from the dilatability and the guide being worn out abnormally is when the valve that is made with different alloys, will contribute with a faster deterioration.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 43998630938

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Reviewed in the United States on June 2, 2026
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★★★★★ 3
Nice product but size is not as expected
Size: 3X-Large, Color: Green White
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Reviewed in the United States on November 28, 2025
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