Changing Font Size

These Aluminium Cylinder Heads are taking affordable performance street and strip cylinder heads to the next level. These heads utilise ultra-smooth A356-T6 aluminium castings, new as-cast runner and chamber designs produce excellent flow numbers. 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.

Designed for street performance engines to give the ultimate in flow at a budget price. Made from A356 aluminium castings, the 179cc cylinder heads are ideal for operating in the idle to 6500 rpm range. The complete heads include larger then stock 1.55" diameter dual valve spring to handle up to 0.580" maximum lift. Suits flat tappet and hydraulic camshafts.

Supplied READY TO FIT: valves, valve guides, valve springs, valve retainers and valve collets all fitted.
 

Cylinder  Head Specifications:
Material:  A356 Aluminium
Chamber Chamber:  63cc
Intake Port Volume:  179cc
Intake Port Dimension:  2.28" x 1.16"
Exhaust Port Volume:  79cc
Exhaust Port Dimension:  1.75" H x 1.257" W
Spark Plug Location:  Angled
Intake Valve Diameter:  2.02"
Exhaust Valve Diameter:  1.60"
Valve Stem Diameter:  11/32"
Valve Spring Pocket I.D.:  1.50"
Valve Guide Material:  Manganese Bronze
Valve Guide O.D.:  .530" (.560" at base)
Rocker Stud Thread Size:  OE Stock
Valve Angle:  18°
Deck Thickness:  .625"

Valve Spring Specifications:
Installed Height: 1.800"
Installed Pressure: 125lbs
Open Pressure: 340lbs @ 500"
Maximum Lift: .600" @ 1.260"
Coil Bind: 1.120"
Spring Outside Diameter: 1.450"
Spring Inside Diameter: 1.050"
Spring Free Length: 2.200"
Valve Spring Retainer Outside Diameter: 1.400"
Valve Spring Inside Diameter: 0.400"
Valve Spring Retainer Step 1: 1.050"
Valve Spring Retainer Step 2: 0.685"
Valve Spring Locator Outside Diameter: 1.500"