Shocker 227 LS 1 & 2
(Sold in Pairs)

$1,375.00$1,635.00

Our custom 5 axis CNC machined GM castings make these heads a must have for any performance oriented GM LS series engine. These heads provide up to a 65 cfm improvement over the stock OEM versions. The 64cc chambers will increase the compression on a stock LS1 from 10-1 to 10.5-1. The 59cc chambers will increase the compression on a stock LS1 from 10-1 to 11-1. Based on other modifications, gains of up to 40 rwhp can be expected. These are a great choice for naturally aspirated engines and applications where 75-150hp nitrous systems will be used.

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Features:

  • Pro designed CNC ports
  • 227cc Fully CNC ported in the USA
  • 5 angle valve job
  • Bronze guides
  • Diamond honed guides
  • Assemblies include: 21-4N stainless 1pc swirl polished valves, PAC springs & titanium retianers
  • Machined and Assembled in the USA