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Proflow Cylinder Heads LS3 SuperMax 276 CNC Bare Holden Chev Aluminium 6-Bolt LS3/L76/L77/L92/L98/LSX 276cc Intake 70cc Chamber Pair Luxury
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Proflow Cylinder Heads LS3 SuperMax 276 CNC Bare Holden Chev Aluminium 6-Bolt LS3/L76/L77/L92/L98/LSX 276cc Intake 70cc Chamber Pair Luxury

Original price was: $2,518.95.Current price is: $1,007.58.

SKU: SK1035111-US20260126-092757 Category: Tag:

Description

Proflow does not sacrifice quality for a low price- you get both with our aluminium cylinder heads. Our LS3 cylinder heads are designed for street / race performance engines to give the ultimate in flow at a competitive price. Cast from A356 aluminium, these 15° LS3 rectangle port heads are designed to fit LS series engines with a 4.00″ or larger bore. These bare 275cc heads accept 2.165″ diameter intake valves and 1.60″ exhaust valves and have a 0.625″ deck thickness. Suits 6-bolt standard or LSX block designs.

SPECIFICATIONS
Combustion Chamber 70 cc
Intake Port Volume 276 cc
Exhaust Port Volume 92 cc
Exhaust Port Dimensions 1.47” (H) x 1.65” (W)
Spark Plug Location OEM
Intake Valve Diameter 2.165”
Exhaust Valve Diameter 1.59”
Valve Stem Diameter 8 mm
Valve Spring Pocket ID 1.30”
Valve Guide OD 0.502” (0.560” at base)
Maximum Valve Lift 0.750”
Rocker Stud Thread Size OE LS3 Style
Valve Angle 15°
Deck Thickness 0.625”

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