Total Cost with Shipping: AUD 4,360.00
COME Racing 600 Series heads are an out of the box power maker beyond any other cylinder head in stock unported form on the market.
This head is not a replacement for the current 590 heads but provides another option for Holden V8 engine builders and owners looking for maximum potential power outputs in a conventional VN or EFI style Holden cylinder head.
The current 590 heads flow over 600hp out of the box with a small 183cc port volume intake runner and should be a persons first choice for any engine combination to around the 470bhp-500bhp mark in a street or street/strip engine. Producing incredible torque and response particularly in the smaller 5 litre or 355ci Stroker engines you cannot buy a better cylinder head anywhere or even attempt to modify a factory cast iron head to produce similar results for the cost of our 590 heads.
Our new head known as the "600 Series" heads provides the next performance level in an "out of the box" unported head previously thought impossible to achieve. When one looks at the numbers these heads flow it's really a no brainer for anyone considering the ultimate in Holden V8 head choices.
For high rpm normally aspirated use or incredible outputs with boost due to the best possible exhaust port configuration you can't go past these amazing 600 heads.
Supplied unassembled with seats cut and stainless 2.08" intake and 1.6" exhaust valves, pushrod guide plates, positive stem seals. You will need to purchase matching valve springs, retainers, locks and steel spring seats from your cam supplier to complete these heads. Heads are supplied with approximately 61-62cc combustion chamber sizes but with the extra thick deck surfaces they can be safely milled to around 50cc's depending on compression ratios required.
Flow data in CFM @28" test pressures with the as cast 207cc intake runner volume and 2.08" intake valve
.100"...64.3
.200"..142.7
.300"..206.0
.400"..262.4
.500"..288.5...594hp potential
.600"..304.2...627hp potential
.700"..309.1...637hp potential
.800"..311.2...641hp potential
Another breakthrough is the matching Exhaust port which flows through a 1.60" valve @28" test pressure...
.100"...52.5
.200"..111.6
.300"..161.1
.400"..184.0
.500"..207.5
.600"..218.1
.700"..223.7
.800"..227.0