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Here are the heads that were used on the C5R engine. Most likely still used on the LS7R do required casting head numbers to the homlogated C5 in 1998
C5R bare racing cylinder head 355-T7"as-cast" aluminum racing head
Professional porting of combustion chamber chambers required
No seats, or guides
C5R rectangle port design-requires rectangle port intake manifolds
Designed for 2.180"/1.625" valves
Valve angle revised to 11 degrees,
Machined for big bore LS&/C5R race block
210 cc "as-cast" intake ports
70 cc "as-cast" exhaust ports same as production LS6
30 cc "as-cast" combustion chambers
All fasteners are metric
Valve cover rails have O-ring groove for .125" O-ring
Capable of over 800 horsepower
GM Part # 12480090
I have asked Katech about a 6 liter LPM1 engine, and their response was they could develope just about anything.
Last edited by AU N EGL; 9 Feb 2007 at 12:27.
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