SKU: 3405721725

Supertech Performance NEVN-1010 Nissan 240SX/KA24DE Exhaust valve 31.80x6.94x99.00mm/SS/ Blk. Nitrided/ 0.5+/ Undercut

Sale price$21.82 Regular price$24.24
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Ships within 48 hours · Estimated delivery Jul 22 - Jul 27

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Description

Supertech Performance NEVN-1010 Nissan 240SX/KA24DE Exhaust valve 31.80x6.94x99.00mm/SS/ Blk. Nitrided/ 0.5+/ UndercutSupertech Performance NEVN 1010 Nissan 240SX KA24DE Exhaust valve 31. 80x6. 94x99. 00mm SS Blk. Nitrided 0. 5+ Undercut 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

Supertech Performance NEVN-1010 Nissan 240SX/KA24DE Exhaust valve 31.80x6.94x99.00mm/SS/ Blk. Nitrided/ 0.5+/ Undercut

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.
  • 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]
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SKU: 3405721725

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Chantal
Lake Worth, US
★★★★★ 5
Great for the price
Breathable material and it fits well. A little thin but it works. Great for the price.
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Reviewed in the United States on July 15, 2025
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Kaitlyn
Port Orchard, US
★★★★★ 3
Runs tight
It's a little tight for a 2XL even with the stretch. Nice color, kind of stretchy, nice material, didn't have many wrinkles at all, soft, but was pretty tight.
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Reviewed in the United States on November 29, 2025
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Michael T. Long
Louisville, US
★★★★★ 5
A good fit
The shirt looks good, feels good and the lapel pins are an extra bonus
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Reviewed in the United States on October 28, 2025
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KeLend Smith
San Leandro, US
★★★★★ 5
Would highly recommend
Color: Black, Size: Large
Great material, the price was very good, does have wrinkles but come out with ironing. Color is as shown in pictures, great appearance and overall product. Fits true to size, I’m 6’0 ft 185 lbs and I ordered a Large.
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Reviewed in the United States on March 27, 2026
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hawaii country
West Palm Beach, US
★★★★★ 5
Nice jacket
Color: Black, Size: Medium
Fits nicely, looks great, right out of the package. Great price
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Reviewed in the United States on May 13, 2026

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