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.

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http://i1300.photobucket.com/albums/...517F758C55.jpg

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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.

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

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 :ack:

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.....

Monday bump!

If you would like, we can have these ported for your engine, inquire about finishing them for you build.