One Piece Valve
Our valves are not finished from generic blanks rather they are specifically designed for each and every application. We work relentlessly, testing and researching every aspect trying to improve the air flow of our designs.
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Ships within 48 hours · Estimated delivery Aug 21 - Aug 26
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Description
Supertech Inconel Exhaust Valve Set of 12 - BMW N54Production of our racing valves begins with a one piece forging, where the head of the valve is forged under a slow two step process to keep a good material grain flow. The forging is then CNC machined in several steps to ensure the precision of the final dimensions. We then do another heat treatment for stress relieving followed by a nitride hardening treatment (or coating process depending on the application). Lastly, we do one more grinding,
Production of our racing valves begins with a one piece forging, where the head of the valve is forged under a slow two step process to keep a good material grain flow. The forging is then CNC machined in several steps to ensure the precision of the final dimensions. We then do another heat treatment for stress relieving followed by a nitride hardening treatment (or coating process depending on the application). Lastly, we do one more grinding, followed by our patented Superfinishing of the surface to ensure that each valve is free of any imperfections and the dimensions are precise.We apply more than 30 years of experience in the development of each and every Supertech racing valve we sell. Combine this experience with state of the art equipment such as ultrasonic tests, x-rays, laser measurement equipment, and applications like computerized Finite Element Analysis (FEA) and it is no wonder why supertech has some of the best performance products on the market.
While this is more than most manufacturers we dont stop there. We also do extensive testing working very closely with many of today's top engine builders in order to continuously improve our products. All of this is meant to insure Supertech's industry leading reputation for high flow rates, durability and uncompromising quality.
Durability
With every valve design we strive to maximize durability through higher fatigue resistance and tensile strength. Each valve tip is hardened beyond 52HRc.
Strict Tolerances
Its unlikely you will find any of our competitors valves with stricter dimensional tolerances than our Supertech valves. Combine that with finished seats with equally strict run out tolerances and you wont find a better sealing, better performing and easier to install solution anywhere!
Higher Flow Rates
Optimum high flow rates are achieved by ensuring that our valves are manufactured with the best angles for each application. We consider back cut, under cut and valve head angles for each application to produce the optimum high flow rates for each application.
Superfinish
In 2006 we introduced our stem Superfinishing as a standard addition to all of our valves at no additional cost. When our Superfinish is combined with our Black Nitrided valve, it reduces the surface roughness to 1/3 of our chrome coated valve. The end result& unsurpassed performance and durability.
- Head Diam: 28mm (std)
- Material: Inconel-Nimonic / Sodium Filled
- Groove Type: Single Groove
- Length: 112.9mm
- Stem Diam: 5.96mm
Replaces OE Part # 11-34-7-573-840 / 11 34 7 573 840 / 11347573840
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.5 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 4
Good tray
Color: Black, Color: Black
Build
These rectangular valet trays are perfect for placements on nightstands, sofas, end tables, etc. They are very compact and unobtrusive. Their size is ideal for holding daily essentials without taking up excessive space, and blending seamlessly with various decor styles.
Material
Constructed with a soft and durable synthetic surface, the tray is gentle to the touch and provides a wipeable and easy to clearn finish. The black color complements any decor and the materials prevent damage to surfaces they are put on.
Functionality
These trays serve as excellent catch-alls for remotes, phones, earbuds, glasses, jewelry, watches and other small items, helping keep sofas, nightstands and tables organized and clutter-free. The sturdy, level construction ensures stability, and the trays hold essentials like phones, TV remotes, and personal accessories effectively.
Value for Money (VFM)
Given their functionality, design, and affordability, these valet trays offer good value. They enhance organization without compromising style and are suitable for various rooms in the home. Will definitely recommend them.
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Reviewed in the United States on September 30, 2025
★★★★★ 5
Looks luxe
Color: Green
Love this for my vanity. A good size, great quality and the deep green is perfection.
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Reviewed in the United States on March 31, 2026
★★★★★ 5
Great quality
Color: Black
I was really surprised by the quality. It's very nice and larger than what I thought perfect to organize a bathroom or room
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Reviewed in the United States on February 5, 2026
★★★★★ 5
Great tool for organization
Color: Beige
Ahhh perfect for my hubby who loses remotes daily! Sleek and good quality
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Reviewed in the United States on January 17, 2026
★★★★★ 5
Works great, good quality and colors
Color: Beige
Just love this remote control holder. Have two in the living room, two in the bedroom and gave some to our children. Sure beats the mess of having remotes laying all over the furniture. And at night I can reach for a remote to change the height of my adjustable mattress in the dark, because I know the location right at the beginning of the holder. Pretty colors and blending with furniture well. Built to last and perfect size.
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Reviewed in the United States on November 15, 2025
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