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Description
Supertech Black Nitride/Iconel Race Dished Valve Set - Audi/VW 2.0 FSI 16VSupertech valves are made from one piece forged stainless steel. Intake valves are made in SAE EV8 (UNS S63008) and exhaust valves are made from Inconel 575. Inconel 575 is a Nickel based alloy material used for exhaust valves in engines that reach very high temperatures and its use is growing with the application of turbos and superchargers. These valves are hollow and filled with Sodium. This will ensure cooling of the valve by removing heat from
Supertech valves are made from one piece forged stainless steel. Intake valves are made in SAE EV8 (UNS S63008) and exhaust valves are made from Inconel 575.
Inconel 575 is a Nickel based alloy material used for exhaust valves in engines that reach very high temperatures and its use is growing with the application of turbos and superchargers. These valves are hollow and filled with Sodium. This will ensure cooling of the valve by removing heat from the head of the valve to the stem, providing better temperature distribution, and lowering head temperature.
Supertech Performance apply's different heat treatments to this material to obtain different hardness and ductility in accordance to application and budget (Street Performance or Heavy Duty Racing).
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.
- 8 x 33.85mm (std) black nitride intake valves
- 8 x 28mm (std) Iconel exhaust valves
Sold as a 16pc set (8 intake / 8 exhaust valves)
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4.4 ★★★★★
Based on 1383 reviews
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Product Reviews
★★★★★ 5
Carry on with the great writing Rachel Lacey while I look for my next bodyguard book
Format: Kindle
I'm on a bodyguard reading kick right now, only wlw of course. I read this one for the first time about a year ago and somehow, I didn't leave a review. ( I'm good at hopping from one book to another and forgetting to write one. oopsy) I loved the bodyguard part but as stories go I always hate someone's parent dying. ( too much like real life) I know it's necessary to show why Natalie is so effed up. Rachel wrote a great ending to this story and that is always a plus in my eyes.
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Reviewed in the United States on April 22, 2026
★★★★★ 4
cute and captivating
Format: Kindle
I really enjoyed the storyline and the emotional growth of the characters in this book. I’d been putting it off for a while but I’m glad I finally picked it up and took a chance on it because it was such a cute story.
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Reviewed in the United States on July 24, 2025
★★★★★ 5
Romance, Steam, and Angst!
Format: Kindle
When successful movie star Natalie Keane hires Taylor Vaughn to be her bodyguard and fake girlfriend, it doesn't take long for their pretend attraction to spark very real feelings, but with both women deeply scarred by the past, is a Hollywood-style happy ending possible?
Strictly speaking, Cover Story is a celebrity romance. Natalie Keane is a successful film actress whose career is at a high point thanks to a recent Golden Globe nomination. She has an entourage and even lives in a large house that boasts its own observatory with a telescope. But that being said, this is not the glitzy, glamourous, escapist story some readers might associate with the celebrity romance trope. While she may be a powerful star to the outside world, internally, Natalie is quiet, introspective, and perpetually haunted by a traumatic incident from her past. Her carefully insulated world is an extension of the emotional barriers she's built around her heart.
Enter Taylor Vaughn, the sexy, competent bodyguard Natalie hires to pose as her girlfriend while providing extra security. On the surface, she's the perfect heroine to rescue the reclusive Natalie, all while their attraction sizzles to the point of combusting. But Taylor has vulnerabilities and self-doubts too, and the closer she gets to Natalie, the more she risks pushing past her own physical and emotional limitations.
Cover Story has plenty of Hollywood excitement, including red carpet interviews and movie stunts. And there is no shortage of romance or heat between Natalie and Taylor, but what really gives the story impact is the poignant and authentic journeys of heart and mind that the characters take separately and together. The journeys are not straightforward, but ultimately, they highlight the power of healing, taking risks, and finding a person to feel safe with.
If you enjoy sapphic stories with romance, steam, but also a healthy dose of angst and authenticity, you'll be captivated by Cover Story.
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Reviewed in the United States on March 26, 2024
★★★★★ 5
Great read! 5 stars
Format: Paperback
This is such a great read! I love how vulnerable Nath is towards Taylor. It feels so loving....
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Reviewed in the United States on April 16, 2026
★★★★★ 3
Chemistry/connection & spice were great, but there was so much potential for a better story!
Format: Paperback
The potential of this story was high and the chemistry and connection between the characters was well done, but the "climax" was anti-climatic unfortunately. The author could have done so much more with a story about a stalker and fame. The spicy scenes were very well written/very hot, but I wish we had a more exciting ending with higher stakes and a bigger reward for the high stakes. I had to dock 1 star for that.
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Reviewed in the United States on February 13, 2026