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”

 

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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