31mm Race Master Exhaust Valve (Triple Groove) - Set of 8 by Manley Performance
Race Master, and the Pro Flo versions identified as Race Flo valves, are manufactured from XH-426 material. NK-842 is used for exhausts, and NK-842 is used for intakes. This series of valves is intended for bracket, drag, and oval track racers. Below 8000 rpm - at higher engine speeds, titanium valves are usually required.
For engine builders who use them normally, EV-8 alloy (21-4N) valves are in this Manley series. The valves offer a superior product at a very attractive price. The ultimate tensile strength tables on this and the following pages demonstrate that the Manley Race Series is equal to the very best that competitors have to offer.
Features
- Head Diameter: 31mm
- Stem Diameter: .2740"
- Installed Height: Stock
- O/A Length: 4.587"
- Tip Length: 0.425"
- Underhead Angle/Radius: 15° x 1/2°
- Margin: 0.050"
- Seat Width: 0.080"
- Head Top: 9° Dish
- Chrome stems and hard tips
- Swirl polished and fully machined
- XH-426 Exhaust
Benefits
- Recommended exhaust valve for alcohol engines
- Equal to the very best that competitors have to offer
Note: Triple groove requires factory-style locks, and Bead Loc® single radius groove requires Manley's Bead Loc® P/N 13089-32.
Applications
- 1996–2004 Ford Mustang SVT Cobra
- 2003–2004 Ford Mustang Mach 1
- 2007–2012 Ford Shelby GT500
- 2004–2006 Ford GT
What's in the box?
- 8 - Valves
Warranty
- Due to the nature of their intended use, Manley products are sold without warranty.
Before Ordering
〇Regarding Import Consumption Tax
At Shaftoya Shopping Site, we pay the import consumption tax incurred at the time of import on your behalf, so there will be no additional charges beyond the total amount paid at checkout.
〇Confirmation of Compatibility
Since our entire product database is based on North American vehicles (USDM), please confirm whether or not they can be installed on Japanese vehicles (JDM) before ordering. (If you are unsure if a listed product is compatible with your vehicle, please feel free to contact us. Our support team will investigate for you.)
If you place an order without confirming compatibility, we cannot accept returns due to incompatibility.
Please note that even if products are sorted by selecting the year, manufacturer, and vehicle model in the tabs on our top page, it does not necessarily mean they are compatible with Japanese models without modification.
All products have been translated into Japanese using translation software. There may be confusing expressions, so please contact us before ordering if you have any questions.
○Regarding Shipping
Shipping costs are paid at the time of payment. Shipping cost estimates are automatically calculated when you enter your shipping address on the checkout page. For large items such as body parts, there are rare cases where there is a significant discrepancy between the automatically calculated shipping cost and the actual shipping cost. In such cases, we will contact you individually by email.
In principle, all products are shipped internationally from our U.S. warehouse. Unlike domestic shipping in Japan, international shipping takes about 7 to 14 days, so please order with time to spare. If you are in a hurry, please contact us to check the delivery date in advance. Note that all products are transported by air. They are not shipped by sea freight.
○Regarding Compatibility with Japanese Vehicle Inspection
Essentially, all products we handle are designed and manufactured outside of Japan. Please note that they do not comply with the "Japanese Vehicle Inspection System," and we cannot provide strength calculation documents for the Japanese vehicle inspection system. Therefore, all parts are sold for the purpose of "use on circuits, private property, or off-road," and please install and use them at your own risk.
○Regarding Warranty
Please check the contents immediately when the product arrives. Since all products are shipped internationally from outside Japan, there may be shipping damage to the packaging box or the product. Please understand that we will only provide returns, refunds, or replacement exchanges if you contact us within 7 days of receipt regarding products with shipping damage, defective products, or products different from your order. Please note that for products sold through us, we will provide warranty-related support "only through us." We do not provide support through other companies or distributors located in Japan.