The General Motors LS3 engine is a strong, reliable engine that has been used in a lot of vehicles. It is perfect for engine swaps and builds. Racing Head Service (RHS) has introduced its new Pro Action Rectangle Port Aluminum Cylinder Heads as a premium replacement option.

Designed with the same architecture of the factory cylinder head, the new Pro Action head is a spot-on replacement. All factory components easily bolt-on, and it even features the correct intake manifold alignment slots to make sure things are right where they should be, and not sucking power away.

The new heads are available bare or as assembled units. To make installation easy, assembled versions feature either dual or Beehive valve springs, chromoly-steel retainers, heavy-duty stainless steel valves and top-quality valve seals. Each unit features premium bronze/manganese valve guides as well as RHS’ patented Clean Cast Technology to ensure they are free of defects and have a smooth internal surface.

Features & Benefits:

•  .660-inch and .570-inch Lift valve springs allow for higher lift cams an increased RPM
• Factory architecture ensures that stock parts fit
• Bronze/manganese valve guides increase durability and longevity
• One of the best performance values on the market

RHS is an integral part of the COMP Performance Group, which combines the knowledge, expertise and manufacturing strength of many top brands in the industry. RHS had a long-standing legacy in the racing world and was the initial groundwork that paved the way for sister company Competition Cams (COMP Cams). By combining innovative cylinder heads and camshafts, the two have dominated.

For more information on Racing Head Service and its products, head over to their website.