These Ferrea Dual Valve Springs upgrade the valvetrain on the BMW S54 (E46 M3 / Z4 M) inline-six with inner and outer springs for improved valve control at high rpm and with performance camshafts. Sold as a set of 24.
Specifications
| Type | Dual valve springs |
| Application | BMW S54 |
| Quantity | Set of 24 |
| Note | Requires spring seat locator FERSL1141 |
| Part Number | S10156 |
Shipping: In-stock orders placed before 4 PM EST ship the same day, with standard, expedited, and overnight options available at checkout. Backordered items ship as soon as our distributor restocks — contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
