Bare GM LS3 4 Bolt 276cc CNC Ported Aluminium Cylinder Heads with 70cc Chamber (Pair) 2.60" x 1.28" Intake Port, 1.47" x 1.64" Exhaust Port Hose Ends Aeroflow's 570 series fittings are

Aeroflow's 570 series fittings are the choice of professionals for use in power steering

valve springs

Features built-in bleeders & 70's OEM look

The Aeroflow Performance small block Chevy cylinder heads are designed for entry level street performance engines to give the ultimate in flow at a budget price

Bare GM LS3 4 Bolt 276cc CNC Ported Aluminium Cylinder Heads with 70cc Chamber (Pair) 2.60" x 1.28" Intake Port, 1.47" x 1.64" Exhaust Port Hose Ends Aeroflow's 570 series fittings areThe Aeroflow Series of Aluminium Cylinder Heads are taking affordable performance street and strip cylinder heads to the next level. Theseheads utilise ultra smooth A356 T6 aluminium castings, new as cast runner and chamberdesigns produce excellent flownumbers. This combined with a 5 angle competition valve job,diamond honed bronze guides, hand bowl blending and professional assembly help to outperform some of the best brands in the business. The