Skunk2 MLS (Multiple Layer Steel) head gasket is the proven choice for high-performance engines. Multiple steel layers plus an HR-180 fluoroelastomer rubber coating give excellent flange conformability and superior sealing against the increased power and vibration of a built motor, heat-resistant to 250 C (482 F). The stopper design sandwiches extra material between layers to seal reliably even where there is minimal surface around the combustion chamber, such as on overbored cylinders. Laser-welded, plastic-resin coated.
Specifications
| Engine | Honda/Acura K20A VTEC |
| Type | MLS stopper |
| Bore | 87.00mm (3.425in) |
| Thickness | 1.35mm (0.053in) |
| Part Number | 366-05-4000 |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- 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-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
