Skip to product information

PRC LS3 Aftermarket 6-Bolt 260cc CNC Cylinder Heads





PRC's aftermarket casting LS3/L92/L99 cylinder heads come standard with the following options:

  • NEW PRC 13-Degree Valve Angle LS3 Castings
  • Improved Piston-to-Valve Clearance For Extra Compression & Larger Camshafts
  • Smaller Than Stock Intake Port Volume For Improved Port Velocity
  • Stainless Steel Hollow Stem 2.185" Intake Valves & Stainless Steel 1.60" Exhaust Valves
  • Integrated Rocker Pedestals
  • TSP .660 Spring Kit w/ PAC Valve Springs & Titanium Retainers
  • CHE Bronze Guides
  • Completely Assembled in the USA     
  • 68cc Chambers
All PRC cylinder heads are extensively researched and tested. The all-new PRC aftermarket casting LS3 cylinder heads are designed to flow considerably more than a gm ported casting while keeping the port sizes smaller for improved port velocity. The result is a cylinder head that is smaller than a stock GM LS3 port and moves more air than any other ls3 cylinder heads! 

The all new PRC aftermarket casting LS3 heads are the perfect option for customers looking for the ultimate in LS3/L99/L92 cylinder head technology

The 13-degree valve angle will allow for the ability to run more compression and larger camshafts thanks to additional piston-to-valve clearance!!  


Intake Flow 

 Exhaust Flow


 157 cfm

 117 cfm


 224 cfm

 170 cfm


 279 cfm

205 cfm


 329 cfm

 225 cfm


 360 cfm

 235 cfm

 .650"  372 cfm  240 cfm
 .700"  380 cfm  243 cfm

With all PRC cylinder heads, quality and performance are our two highest priorities! In addition to performance, you will not find a better performing set of cylinder heads at this price (cost is for the pair!). Call one of our sales consultants today if you have any questions or if you would like to discuss your specific application.