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Description
Supertech Mini Cooper R56 N14B16C Black Nitrided Intake Valve - +1mm Oversize - Set of 8Set of 8 Supertech uses over 20 years of manufacturing experience to design and produce its Valves. Intensive testing and working closely with engine builders provide continuous improvements and provides the market with the best possible product for every application. High flow rate, durability, and quality are all of great concern. Supertech understands that each motor is unique in its requirements and demands. Therefore Supertech offers valves in a
Set of 8
Supertech uses over 20 years of manufacturing experience to design and produce its Valves. Intensive testing and working closely with engine builders provide continuous improvements and provides the market with the best possible product for every application. High flow rate, durability, and quality are all of great concern.
Supertech understands that each motor is unique in its requirements and demands. Therefore Supertech offers valves in a range of materials to suit any motor.
* Stainless - Made as a one-piece forged valve for higher strength and reliability. Supertech uses mostly EV8 (21-4N) for Intake and Exhaust Valves, however, there are other alloys that are used with different heat treatments to manufacture Valves for specific applications.
To address the issue of high heat, Supertech uses two different types of coatings:
Chrome Coating - Widely used in performance valves
Black Nitride - This is a hardening treatment that provides a smooth surface then chromed valves and produces less friction between stem and guide.
* Inconel 751 - Nickel Base Alloy - Nickel base alloy is used for exhaust valves that reach very high temperatures, such as those in turbo or supercharged applications.
Supertech uses over 20 years of manufacturing experience to design and produce its Valves. Intensive testing and working closely with engine builders provide continuous improvements and provides the market with the best possible product for every application. High flow rate, durability, and quality are all of great concern.
Supertech understands that each motor is unique in its requirements and demands. Therefore Supertech offers valves in a range of materials to suit any motor.
* Stainless - Made as a one-piece forged valve for higher strength and reliability. Supertech uses mostly EV8 (21-4N) for Intake and Exhaust Valves, however, there are other alloys that are used with different heat treatments to manufacture Valves for specific applications.
To address the issue of high heat, Supertech uses two different types of coatings:
Chrome Coating - Widely used in performance valves
Black Nitride - This is a hardening treatment that provides a smooth surface then chromed valves and produces less friction between stem and guide.
* Inconel 751 - Nickel Base Alloy - Nickel base alloy is used for exhaust valves that reach very high temperatures, such as those in turbo or supercharged applications.
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 21 reviews
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Product Reviews
★★★★★ 4
Runs small
Size: 10 Slim, Color: Victory Blue Wash
Great quality but ran small compared to the wider leg version.
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Reviewed in the United States on December 17, 2025
★★★★★ 5
I am 72 and short.
Size: 16, Color: Blue 2-pack
Fit great and perfect length. One pair twisted after washing. Would still order again
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Reviewed in the United States on May 13, 2026
★★★★★ 5
👍🏻
Size: 6, Color: Md Lara Wash
Perfect fit
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Perfect for school
Size: 5 Slim, Color: Victory Blue Wash
My grandkids love these..comfortable and easy care
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Love them!
Size: 7 Slim, Color: Washed Blue
I did but expect these jeans to fit so well and look so nice on my daughter. Hands down the best jeans I’ve purchased for her, much better fit and quality than the other stores! The length is perfect, but it’s a little snug in the waist. Still a great fit with some stretchiness! Great value!
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Reviewed in the United States on July 25, 2025