Bare Heads Pair – Rectangle Intake Ports 276cc, 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 | 68cc
Intake Runner Volume | 276cc
Intake Port Size H x W | 2.585″ X 1.275″
Exhaust Runner Volume | 92cc
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
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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