SKU: 91713408061

Supertech Black Nitride Exhaust Valve Set - BMW S14

$136.03 $151.14
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Description

Supertech Black Nitride Exhaust Valve Set - BMW S14Set of 8 Exhaust Valves Head Diam: 31. 50mm Material: Black Nitride Groove Type: Single Groove Length: 105. 65mm Stem Diam: 5. 95mm Size: 1mm+ Engine Valve Manufacturing 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


Set of 8 Exhaust Valves

  • Head Diam: 31.50mm
  • Material: Black Nitride
  • Groove Type: Single Groove
  • Length: 105.65mm
  • Stem Diam: 5.95mm
  • Size: 1mm+

Engine Valve Manufacturing

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.

Engine Valve Technology

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 don’t 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.

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.

 

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

It’s unlikely you will find any of our competitor’s valves with stricter dimensional tolerances than our Supertech valves. Combine that with finished seats with equally strict run out tolerances and you won’t 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.


Replaces OE Part #   11-34-1-309-487 / 11 34 1 309 487 / 11341309487


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: 91713408061

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4.6 ★★★★★
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sue d
Pawtucket, US
★★★★★ 5
How easy they are. And space saving
Item Package Quantity: 2
These are great. Made such a difference in my cupboards. Would rate as a 10
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
J
Julie B
West Palm Beach, US
★★★★★ 5
Finally solved my spice cabinet chaos
Item Package Quantity: 2
I didn’t realize how much time I was wasting digging through my spice cabinet until I installed these. My spices used to be stacked behind one another, which meant every time I needed a specific seasoning, I had to move half the cabinet around just to find it. These racks completely solved that problem. What immediately appealed to me was the no-drill installation. I rent my home, so I’m always hesitant to make permanent changes to cabinets. The peel-and-stick setup was surprisingly easy, and I had both racks installed in just a few minutes. Once attached, they felt much more secure than I expected. I was initially skeptical about adhesive mounting, but they’ve stayed firmly in place. The pull-out design is where these really shine. Instead of reaching into a dark cabinet and searching through rows of jars, I can simply slide the rack out and instantly see everything. It’s one of those organizational upgrades that makes everyday cooking noticeably easier. I also appreciate the adjustable height feature. My spice collection includes a mix of different bottle sizes, and I was able to configure the racks to accommodate both smaller and larger containers without any issues. The flexibility makes them much more useful than fixed-size organizers. Another thing I noticed is how much cabinet space they helped free up. By using vertical space more efficiently, my cabinet feels less cluttered and much more organized. I can now find exactly what I need without knocking over other jars or creating a mess. The overall construction feels sturdy, and the sliding action remains smooth even when the racks are fully loaded. This is one of those products that seems basic but ends up making a bigger difference than expected. If your spice cabinet is crowded, disorganized, or constantly frustrating to use, these racks are an easy solution. They’ve made cooking more convenient, improved organization, and helped maximize storage space. For me, that’s an easy five-star product.
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Reviewed in the United States on May 31, 2026
S
S. O.
Louisville, US
★★★★★ 5
Finally, a Spice Rack That Fixes the Real Problem—Access Without the Hassle
Item Package Quantity: 2
I am pleasantly surprised at how handy this spice rack is!! This iSPECLE pull-out spice rack does that others rarely deliver... makes your daily routine just that much easier. The biggest win here is access. No longer having to rummage through a messy cabinet or knock over jars to retrieve whatever you’re looking for. With everything just sliding out and coming up right in front of you. The idea is simple, but it creates a difference. There's your strong point here: the no-drill, peel-and-stick installation. It’s simple and time-saving, which is something. That being said, it still needs to be installed correctly. Use a clean surface, pressure, and time to set. Do that, and it holds well. Overlook that step, and you’ll be blaming the product when it’s all set up for you. The adjustable height is practical, especially if you’re working with a mix of 4oz and 8oz spice jars. It’s not flashy, but it offers a solution to the same annoying problem: trying to cram mismatched containers into a rigid system. What impresses me the most is that it provides some order rather than making things ever murkier. It’s not looking to reinvent your kitchen. It takes a common frustration (buried spices in dark cabinets) and makes it neat and clean for practicality's sake. Bottom line: If your cabinet seems like a black hole of spices, this is an easy, straightforward solution. Not anything fancy, just smart design and it works!
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Reviewed in the United States on April 8, 2026
M
Michael midkiff
Fort Morgan, US
★★★★★ 5
Be Mindful Of The Height
Item Package Quantity: 2
So this spice rack is amazing, if you know what you're getting. I have had a similar one in the past that was just one level. It was great and made organization easy. This being two levels tall means you have to take that into account because it's going to change the shelve layout in your spice cabinet. It wasn't a problem for me and still ended up being a net positive for making the most out of the space, but my friend bought the same ones and ended up sending them back because they wouldn't fit into his smaller cabinet. If you are aware of that going in and know it's going to work for you, they are amazing. They slide smoothly, they hold a ton, and make getting to the items in the back infinitely better. Decent price for such a huge quality of life improvement for my kitchen.
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Reviewed in the United States on April 24, 2026
D
Don T.
Alexandria, US
★★★★★ 4
Didn't entirely save me from the mess, but it got close!
Item Package Quantity: 2, Item Package Quantity: 2
I set these up in my little mini pantry that is admittedly a bit of a mess before AND after, but now it's an organized mess that I can navigate with a bit more ease. It fits well in the space that I have, and the rollers are high quality and feel smooth. If organized chaos speaks to you and you've acknowledged that, this is a great fit!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026

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