AF95-0406 - AEROFLOW GM LS 240CC ALUMIN HEADS BARE

Bare GM LS3 6 Bolt 240cc Aluminium Cylinder Headswith 68cc Chamber to Suit 3.90" Bore (Pair)
2.60" x 1.25" Intake Port, 1.70" x 1.79" Rectangle Exhaust Port

The 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 Aeroflow Performance GM LS cylinder heads are designed for street/ race performance engines to give the ultimate in flow at acompetitive price. Made from A356 aluminium castings, these11° LS3 Rectangle Port heads are designed to fit LS series engines with a small 3.90" bore. These bare 240cc heads accept 2.08" diameter intake valves and 1.60" exhaust valves and have a thicker than stock .750" deck thickness. Available in 6-bolt design to suit standard or LSX block designs.

Note: Thread sealant must be used on all rocker bolts asthreads intersect with intake ports.

Head Specifications

Material: A356 Aluminium
Chamber Chamber: 68cc
Intake Port Volume: 240cc
Intake Port Dimension: 1.25" x 2.60"
Exhaust Port Volume: 102cc
Exhaust Port Dimension: 1.70" H x 1.79" W
Spark Plug Location: OE Stock
Intake Valve Diameter: 2.08" x 5.45"
Exhaust Valve Diameter: 1.60" x 5.45"
Valve Stem Diameter: 8mm
ValveSpring Pocket I.D.: 1.55"
Valve Guide Material: Manganese Bronze
Valve Guide O.D.: .502" (.560" at base)
Rocker Design: LS3 Rails required
Valve Angle: 11°
Deck Thickness: .750"

IMPORTANT NOTICE:

We recommend to check installed spring seat pressure& open pressure before installing your cylinder headsto make sure the spring pressure is correct for your application.