Dart Pro 1 LS3 Aluminum Cylinder Head 11030152 - 280cc Square Port, Assembled .625'' Beehive Springs

Dart Pro 1 LS3 Aluminum Cylinder Head 11030152 - 280cc Square Port, Assembled The Pro 1 Series heads from Dart cover street and racing applications! The as cast ports are known to flow better than many ported designs and come at a much more affordable price tag. These heads offer better airflow, more efficient combustion chambers, higher performance and more versatility than factory designs.  Features Assembled with Beehive Valve Springs Stock Valve Angles Factory valve locations Factory accessory mounting holes 68CC CHAMBERS Heads are sold individually. Dart Pro 1 aluminum heads for GM LS Series small block V8 engines take performance to the next level. They're available bare or assembled, in both cathedral port and square port designs, for applications ranging from street cars and trucks to all-out racing vehicles. Pro1 LS high performance cylinder heads have better airflow, more efficient combustion chambers, and more user-friendly features than production LS castings. Offered in