Exhaust Valve Black Nitrided (33-35mm)

Petrol: 1.8 8V (90), 1.8 8V (110), 2.0 8V (100), 2.0 8v (115)

 

Audi: A4 (B6) (01 - 05), A6 (C4) (94 - 97), A4 (B5) (94 - 01), A8 (D2) (94 - 03)

 

Seat: Alhambra (96 - 10), Ibiza (6KF) (99 - 02), Cordoba (6K) (93 - 02), Ibiza (6K) (93 - 99)

 

Skoda: Fabia (5J) (07+), Fabia (6Y) (99 - 07), Octavia (1U) (96 - 06)

 

VW: Beetle (Mk2) (98 - 10), Golf (Mk3) (92 - 99), Passat (B5) (96 - 00), Sharan (95+), Vento (91 - 98), Corrado (88 - 95), Golf (Mk4) (98 - 06), Passat (B5.5) (01 - 05), Bora (98 - 05), Golf (Mk2) (83 - 92), Passat (B4) (93 - 97)

 

Supertech Performance uses their experience of more than 20 years in the manufacturing of racing valves, do intensive testing and work very closely with many engine builders in order to continuously improve and provide the market with the best possible product for every application.
High flow rates, durability and quality are of great concern to Supertech Performanace.

Supertech Performance manufactures racing valves in many different materials like Stainless Steel, Nimonic, Inconel, Titanium, etc. There are different alloys, heat treatments and coatings used for different applications. For most of the alloys, Supertech Perormance follows the specifications under SAE standard J775.

Black Nitrided: this is a hardening treatment that even though it is not widely used as the chrome coating, it has several benefits and is becoming very popular, mainly for European applications.

1. The microhardness is higher than the stainless steel base material, keeping good ductility beneath the hard nitrided layer.
2. Surface finish is smoother than with chromed stems, having less friction between stem and guide.
3. 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).
4. 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.
5. 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.
6. The Black Nitride applies to the whole valve while the chrome coating is only applied to the stem.

All valves are swirl polished, have stem undercut and a hardened tip.

For: 1.8/2.0 8v

*Priced Per Valve