A set of eight exhaust valves from Ferrea's Super Alloy line for the Chevrolet small block, with a 1.625in head diameter, an 11/32in stem and an overall length of 5.46in. These are 12-degree valves carrying Ferrea's S-Flo head form, cut for 12-degree cylinder heads rather than a stock 23-degree head - fitting them to the wrong head angle will not give you the seat geometry or the valve-to-piston clearance you are expecting.
Note the +.500 designation and the 5.46in overall length: this valve is longer than a standard small block valve, which changes your installed height. Plan on checking spring installed height, retainer-to-seal clearance, valve-to-piston clearance and pushrod length against the assembled engine rather than assuming a stock valvetrain will carry over. This is the exhaust valve - the matching part on the other side of the chamber is FERF2257P, the 2.125in Competition Plus intake valve. Intake and exhaust valves are not interchangeable.
- Set of 8 valves
- Exhaust valve - not interchangeable with the intake side
- Ferrea Super Alloy product line
- Head diameter 1.625in
- Stem diameter 11/32in
- Overall length 5.46in
- 12-degree valve, S-Flo head form
- +.500 length designation - longer than a standard small block valve
- Application: Chevrolet small block
Specifications
| Type | Exhaust valve set |
| Product Line | Ferrea Super Alloy |
| Head Diameter | 1.625in |
| Stem Diameter | 11/32in |
| Overall Length | 5.46in |
| Valve Angle | 12 degrees |
| Head Form | S-Flo |
| Length Designation | +.500 |
| Quantity | 8 valves per set |
| Engine | Chevrolet small block |
| Part Number | FERF1478P |
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
