DART DA11030153 Pro1 Cast Aluminium Cylinder Heads Chev LS3 w/ 280cc Intake 68cc Chamber w/ 1.295" Dual Springs
Product Information
Dart’s new LS based PRO1 LS 15° 280cc Aluminum square port cylinder head for GM LS series small block V8 engines take performance to the next level. Offers higher performance and more versatility than factory designs.
The 15° based high performance cylinder head has better airflow, more efficient combustion chambers and more user friendly features than production LS castings. The Dart PRO1 LS 280cc cylinder head retains stock valve angles, stock valve locations and stock accessory mounting holes to make installation easy. Virtually everything else has been improved.
Specifications:
Material: RMR Cast Aluminum Alloy
Valve angle: 15°
Intake port volume: 280cc
Intake valve: 2.165"
Exhaust valve: 1.600"
Chamber Volume: 68cc

Product Information
Dart’s new LS based PRO1 LS 15° 280cc Aluminum square port cylinder head for GM LS series small block V8 engines take performance to the next level. Offers higher performance and more versatility than factory designs.
The 15° based high performance cylinder head has better airflow, more efficient combustion chambers and more user friendly features than production LS castings. The Dart PRO1 LS 280cc cylinder head retains stock valve angles, stock valve locations and stock accessory mounting holes to make installation easy. Virtually everything else has been improved.
Specifications:
Material: RMR Cast Aluminum Alloy
Valve angle: 15°
Intake port volume: 280cc
Intake valve: 2.165"
Exhaust valve: 1.600"
Chamber Volume: 68cc