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Description
Supertech Performance NEVI-1001 Nissan CA18 DET Exhaust valve 28.15x5.97x88.30mm / Inconel / Std SizeSupertech Performance NEVI 1001 Nissan CA18 DET Exhaust valve 28. 15x5. 97x88. 30mm Inconel Std Size Supertech valves are the best on the market, made from one piece of forged stainless steel for the ultimate in strength and durability. Supertech valves go through a special heat treatment process that obtains the right amount of harness for each engine to ensure the ultimate valve for your performance motor. Supertech offers their valves in either
Supertech Performance NEVI-1001 Nissan CA18 DET Exhaust valve 28.15x5.97x88.30mm / Inconel / Std Size
Supertech valves are the best on the market, made from one piece of forged stainless steel for the ultimate in strength and durability. Supertech valves go through a special heat treatment process that obtains the right amount of harness for each engine to ensure the ultimate valve for your performance motor. Supertech offers their valves in either chrome coating, used in high performance valves, or hardened black nitrided which is most popular in European and Japanese motors.
Supertech High Performance Race Engine Valves features:
- The microhardness is higher than the stainless steel base material, keeping good ductility beneath the hard nitrided layer (microhardness is 800HV minimum)
- Surface finish is smoother than with chromed stems, having less friction between stem and guide.
- Valve seat surface is harder with the nitrided layer, lasting longer with lead free fuels, alcohols, nitro or other "explosive" mixes. Matches any kind of seats (nodular iron seats, steel powder metal seats, hard aluminum-copper seats or beryllium copper seats).
- Higher rpm's engines take full advantage of all previous features. The higher the engine speed the bigger the power loss due to internal engine friction! The black nitride layer reduces this power loss due to less valve-guide friction.
- The nitrided layer is adhered to the base material at a microscopic level, so does not"flake" or brake when the valves bend due to impacts with the pistons.
- The Black Nitride applies to the whole valve while the chrome coating is only applied to the stem.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.4 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Impressive MacBook Air
Capacity: 16GB Unified Memory | 512GB SSD Storage, Color: Midnight, Set: Without AppleCare+
Ordered via Prime and the Mac arrived the next day. Setup was easy. The M5 chip flies but my usage is basically routine functions no heavy usage. Everything is speedy. This computer is an upgrade from my 2017 MacBook Pro and a 2020 iMac. Both of those old Macs are still functional. I've been using Macs since the Apple IIC and II GS. Over 35 years ago. The keyboard is one of the best I've used. I loved the 2017 MBP keyboard because if had a great feel. Others since then were not comfortable until this keyboard on the MB Air. Booting up is fast. For me the battery will last for four days before recharging. I really like the Mag Safe charger. Easy on and easy off especially if you happen to forget you're charging and pull the computer away from the connection. Connection just drops off. The touchpad is not as sensitive as others. If I accidentally rest my finger or fingers on the pad it doesn't execute an unwanted command. You have to use a little pressure to execute the task. No problems while typing and having the touchpad sending you off into space somewhere. A great Mac upgrade.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Beautiful, Super Thin, Fast
Capacity: 16GB Unified Memory | 512GB SSD Storage, Color: Silver, Set: Without AppleCare+
It’s beautiful, super thin, very fast, and the screen size reminds me of the large iPad Pro. I have to get used to not touching the screen like you do with an iPad. You must use a mouse or your finger. Also programs work differently than apps. Make sure you are ready for that if you are only used to using an iPad.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Awesome
Capacity: 16GB Unified Memory | 512GB SSD Storage, Color: Midnight, Set: Without AppleCare+
This computer is great, it's fast, reliable, and it has a great amount of screen real estate. It's great for people who have trouble reading or people who have to multitask.
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Reviewed in the United States on May 5, 2026
★★★★★ 5
Life changing little screen
Size: 15.6" 1080P, Size: 15.6" 1080P
I was losing my mind trying to work from home off a single laptop screen. Secondary displays were not connecting to my computer outside of the office, IT could not figure out the issue so I was doomed to single screen anytime I worked from home. A co-worker suggested I take a look at this style of screen. I had my doubts that it would work with my lap top, and lo and behold I am back in action with a dual display. It comes with an HDMI cord option and a USB-C cord option (you do not need to buy separate cords, they are included). I used the USB-C as it also acts as a power cord to power the display. It took two seconds to hook up, and with one setting change on my lap top the display successfully extended (does not just duplicate your display, it will allow display extension as well). The image quality is more than sufficient for work (no opinion on PC gaming) and settings such as brightness were easy to adjust. It's the perfect size for use with my lap top screen, and they had plenty of additional size options. The built in stand allows two screen angles, and acts as a cover when not in use. For the price this thing is absolutely clutch, don't waste money on expensive displays - you can use this with any USB-C capable device so it can travel with you for work or fun. I will be interested to see if it has longevity, but for now I'd give this thing 10 stars if I could.
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Reviewed in the United States on February 10, 2026
★★★★★ 5
Great product for a great price
Size: 15.6" 1080P
I REALLY like this. I need 2 screens to do my job efficiently and have struggled lately when traveling. Splurged on this for myself and was really impressed. It’s nice and lightweight but feels sturdy. The image quality is good. The set up could not be easier. This is a game changer for me.
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Reviewed in the United States on May 23, 2026
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