PRC As-Cast 225cc LS1/LS2 Cathedral-Port Cylinder Heads
Fully assembled PRC 225cc as-cast cathedral-port heads for high-flow street and race LS combinations.
- 225cc as-cast intake runners
- 62cc CNC-machined chambers
- 2.065-inch intake valves
- 1.600-inch exhaust valves
- TSP .660-inch dual spring kit with PAC springs and titanium retainers
- Factory LS1 rocker compatible
- Sold as a pair
Fitment: Cathedral-port 5.7L, 6.0L, and larger LS engines with a minimum 3.903-inch bore.
Verify bore size, compression, piston-to-valve clearance, pushrod length, and intake-port compatibility before installation. Not legal for sale or use in California on pollution-controlled vehicles.
Processing & Shipping Overview
Processing occurs before shipping.
Most in-stock items typically process within 2–3 business days before shipment or pickup. Expedited shipping options affect transit time after an order ships and do not speed up processing.
Made-to-order, special-order, vendor drop-ship, and freight items require additional processing time before shipping. Any extended lead times will be noted on the product page when applicable.
For the most up-to-date order status or lead time questions, please contact sales@smgspeed.com or use live chat during business hours.