Photos shown for illustration; shade and shape may differ slightly.
Skunk2 Ultra Valves 33/28 mm, Standard Compression, for Honda B16, B17 and B18 (VTEC) Engines
Supplier stock
Skunk2 Ultra valves for Honda B16, B17 and B18 (VTEC) engines have 33 mm intake and 28 mm exhaust heads, dished, for standard compression. They are Skunk2's premium line, for engines running very high temperatures.
Specifications
| Brand | Skunk2 Racing |
| Code | 310-05-9310 |
| Head diameter (intake / exhaust) | 33 / 28 mm |
| Length (intake / exhaust) | 102 / 102 mm |
| Stem (intake / exhaust) | 5.48 / 5.45 mm |
| Head | dished, standard compression |
Which cars it fits
- Honda B16, B17 and B18 (VTEC) engines
What to check
- One-piece forged valves, HNV-3 martensitic steel on the intake and EV8 austenitic steel on the exhaust, heat treated and chromium nitride coated by physical vapour deposition (PVD) for better wear and heat resistance and lower stem-to-guide friction; 3-10 g lighter than stock.
- Skunk2 recommends the 311-05-7350 Pro XP springs and the 308-05-0300 Pro titanium retainers.