Bare Heads Pair - , 15 Degree Valve Angle 

These are a direct replacement upgrade for rectangular port LS heads as found on LS3 L98 L77 L76 LS engines. They run standard valve dimension. So you can use your existing valves if they are serviceable. Having Bronze guides you will require spring bases to suit (with an ID of .565"). We have these available.

OE 4 Head Bolt Design 

Material | Aluminium 
Combustion Chamber Volume | 69cc
Intake Runner Volume | Specs to come (276cc before cnc porting)
Intake Port Size H x W | 2.585" X 1.275" 
Exhaust Runner Volume | Specs to come 
Exhaust Port Size H x W | 1.467" X 1.614" D Shaped 
Intake Valve Size | 2.165" 
Exhaust Valve Size | 1.600" 
Valve Stem Diameter | 8.00mm 
Valve Length | Standard Length 
Valve Angle | 15 Degree 
Valve Guide Seal Diameter | 0.500" 
Valve Guide Material | Manganese Bronze 
Valve Spring Base Diameter | 1.250" 
Rocker Type | LS3 
Deck Thickness | 0.625" 
 
Flow Data @ 28"(CFM) With 2.165" & 1.600" Valves (the specs below are for the non cnc version of this head. We will have the new improved specs up shortley)
Intake 
@.300" = 213 
@.400" = 265 
@.500" = 296 
@.600" = 332 
@.700" = 338 
Exhaust 
@.300" = 152 
@.400" = 190 
@.500" = 210 
@.600" = 219 
@.700" = 228 

• Here at Malex Motorsports all of our items are in stock in our Sydney based store, ready to ship or pick up.
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