Product Description
PRC 237cc CNC 6.0L Cathedral Port LS Heads
Fits 1999-2013 LS-Based Engines LS2 LQ4 LQ9 408
These 100% USA-cast and machined Precision Race Components cylinder heads feature 237cc fully CNC Ported intake runners. Designed for 4.000"+ bore engines with cathedral port intake manifolds. Extra-thick deck surfaces help alleviate head gasket sealing issues in power-adder applications. Great head for NA, Boosted, or Nitrous applications. The new 237cc port has been flow bench tested to flow over 335cfm and is ideal for higher RPM stock bottom end combinations or stroker engines that can benefit from the additional airflow over the 225 As-Cast heads, though these will work great on milder stock displacement combinations as well. This casting is compatible with existing components including the stock style rocker arms and valve covers for simplicity and cost savings compared to other options on the market. These are 6 bolt castings to fit aftermarket blocks but work great on factory 4-bolt blocks as well with no interference.
Features:
- Fits 4.000" and larger bores
- 237cc Fully CNC Ported Intake Runners
- 84cc Fully CNC Ported Exhaust Runners
- 68cc CNC Machined Combustion Chambers
- Includes TSP .660 Spring Kit w/ PAC Valve Springs & Titanium Retainers
- 6 bolt pattern: Can be used on Aftermarket 6 bolt blocks or Factory 4 bolt blocks.
- CHE Bronze Guides
- 2.100" Lightweight Hollow Stem Intake Valves, 1.600" Stainless Exhaust Valves
- Factory Rocker Friendly!!
- Extra Thick Deck Surfaces For Power Adders
- Made in the USA
- Sold/Priced as a Pair
