PRC LS3 Aftermarket 6-Bolt 255cc CNC Cylinder Heads


SKU: 199-PRCLS36B255 Category:



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 2.170″ Intake, 1.60″ Exhaust Valves
Billet Rocker Pedestals
TSP .660″ Dual Spring Kit w/ PAC Valve Springs, Titanium Retainers, Seats, & Seals
Completely Assembled and Milled to Your Specifications
60-68cc Chambers
Available Milled Down To 65cc Chambers While Still Keeping Better Than Stock P/V!!
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 PRC aftermarket casting LS3 cylinder heads are available in 2 different configurations:

255cc Runners for max effort stock cube LS2/LS3/L99/L92 engines looking for a 370cfm cylinder head that can be aggressively milled & still keep better than stock p/v
260cc Runners For LS3/L99/L92 stroker engines needing a 380cfm+ cylinder head!
The 13-degree valve angle will allow for the ability to run more compression and larger camshafts thanks to additional piston-to-valve clearance!!

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.

Additional information

Spring Kit

TSP .660" Dual Valve Spring Kit Featuring PAC Valve Springs w/Titanium Retainers, TSP .700" Dual Valve Spring Kit Featuring PAC Valve Springs w/Titanium Retainers, No Valve Springs Installed

Chamber Size

60, 61, 62, 63, 64, 65, 66, 67, 68

Select Intake Valves

Hollow Stem Intake/Stainless Steel Exhaust Valves


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