Skunk2 Alpha Series intake and exhaust valve set for the Honda H-series engine, forged one-piece from HNV3 martensitic steel (intake) and EV8 austenitic steel (exhaust), heat-treated and hard-chrome plated. The valve heads are fully machined with airflow-optimized profiles, and each valve runs 3 to 10 grams lighter than stock for better high-rpm control. Sold as a complete valve set.
Specifications
| Type | Engine valve set |
| Series | Alpha Series (standard compression) |
| Engine | Honda H-series |
| Head Diameter | 35.00mm intake / 30.00mm exhaust |
| Stem Diameter | 5.48mm intake / 5.45mm exhaust |
| Overall Length | 106.8mm intake / 106.4mm exhaust |
| Material | HNV3 / EV8 one-piece forged, hard-chrome plated |
| Quantity | Full valve set |
| Part Number | 310-05-1400 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1997-2001 | Honda | Prelude | Base |
| 1997-2001 | Honda | Prelude | Type SH |
| 1993-1996 | Honda | Prelude | VTEC |
Shipping
- Orders placed before 3 PM EST typically ship the same business day. Larger items ship within 1 to 3 business days.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Special order items follow a lead time we confirm with you individually before the order is committed.
- Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
- Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
- Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
- Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
- Product images may be representative. The SKU and specifications in the listing are what ships.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Returns & Refunds · Warranty
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