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Celebrating 250 Years of American Freedom, All Year Long! More Horsepower. More Burnouts.
Celebrating 250 Years of American Freedom. More Horsepower. More Burnouts.

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Availability: Available to order

PRC Aftermarket LT4 312cc CNC-Ported Cylinder Heads

Original price $3,656.99 - Original price $3,656.99
Original price
$3,656.99
$3,656.99 - $3,656.99
Current price $3,656.99

Fully assembled PRC aftermarket LT4 312cc CNC-ported cylinder heads for high-output Gen 5 LT4 combinations.

  • 312cc CNC intake runners
  • 62.5cc chambers
  • 2.165-inch titanium intake valves
  • 1.600-inch stainless exhaust valves
  • TSP .660-inch PAC dual springs with titanium retainers
  • CHE bronze guides
  • Six-bolt casting compatible with standard GM four-bolt and aftermarket six-bolt LT blocks

Fitment: Gen 5 LT4 engines, including Corvette Z06, CTS-V, and Camaro ZL1 applications. Verify direct-injection hardware, piston-to-valve clearance, pushrod length, supercharger-manifold compatibility, and chamber requirements before installation.

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.



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