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F/S C5R Cylinder heads, second design

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Old 12-05-2012, 05:39 PM   #1
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Default F/S C5R Cylinder heads, second design

I have one pair of C5R cylinder heads, second design, that I have on the shelf to sell.

These are 100% un-touched from GM and impossible to get.

















Bare C5R
Racing Cylinder Head
  • 355-T7 'as-cast' Aluminum racing head
  • Professional porting and machining of combustion chambers required
  • No seats or guides
  • C5R rectangle port design requires aftermarket rectangle port intake manifolds
  • Designed for 2.180"/1.625" valves
  • 11' valve angle
  • Machined for 1.625" diameter valve springs & .500" guides
  • Designed for big bore (4.100" min) LS7/C5R/LSX blocks
  • 210cc 'as-cast' intake ports
  • 70cc 'as-cast' exhaust ports, same as production LS6
  • 30cc 'as-cast' combustion chambers
  • All fasteners are metric
  • Valve cover rails have O-ring groove for .125" O-ring
    Capable of over 800 horsepower!





MSRP is well over $1990 each cylinder head.

$1500 ea + shipping.
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Old 12-05-2012, 06:18 PM   #2
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Any flow number ?
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Old 12-05-2012, 06:25 PM   #3
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Quote:
Originally Posted by Sébast19X View Post
Any flow number ?
They are as cast.....there is no port. Depending on what your head guy does what it would be.

They should support well over 800 hp
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Old 12-05-2012, 06:45 PM   #4
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How much would you guys charge to make these functional on my C5Z06 with say a G5X3 cam???? Would have to also list intake options, as I wouldn't have a clue where to start. Sheetmetal
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Old 12-05-2012, 07:18 PM   #5
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Quote:
Originally Posted by 007Duc View Post
How much would you guys charge to make these functional on my C5Z06 with say a G5X3 cam???? Would have to also list intake options, as I wouldn't have a clue where to start. Sheetmetal
It would require a new block if you have a LS1/2/3/6. You need at min. a 4.100" bore. Intake manifolds today are not to hard to do like they were 10 years ago. Hogan, Wilson, Kinsler.....
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Old 12-10-2012, 11:47 AM   #6
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Monday bump!
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Old 12-15-2012, 11:28 AM   #7
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If you would like, we can have these ported for your engine, inquire about finishing them for you build.
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