Proflow Cylinder Heads, LS1 SuperMax 250, Holden Commodore, Chevrolet, Aluminium, Bare 61cc Chamber, 250cc Intake Runner 11deg, Pair
$1,990.00
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Proflow Cylinder Heads, LS1 SuperMax 250, Holden Commodore, Chevrolet, Aluminium, Bare 61cc Chamber, 250cc Intake Runner 11deg, Pair
LS1 SuperMax 250, Aluminium Cylinder Heads 11deg, Holden Chev, Bare
Proflow does not sacrifice quality for a low price--you get both with our aluminium cylinder heads. The lightweight heads are cast from A-356 aluminium alloy with a large choice of engine, for SB & BB Chevrolet, LS Chev Holden Ford SB 289-351W, 302, 351 Cleveland 2V & 3V & BB FE, and Chrysler SB & BB. They have phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas. They're also end-milled and drilled for accessories. The fully assembled heads have stainless steel valves, high performance valve springs, 7 degree valve locks, rocker arm studs, and guideplates. Perfect for your Mild or High performance Hot Rod.
Proflow's SuperMax LS1 Cylinder Heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. This budget friendly head is perfect for your OEM engine operating below 6300 RPM.
Spec;s
Head Gasket Cometic #C5475/5751-051 or equivalent
Head Bolts ARP #134-3610
Head Studs ARP #234-4317
Rocker Arms OE LS3 style ONLY (no stud/guideplate conversions etc.)
Intake Port (cc) 250cc
Intake Port Dimensions 3.22" x 1.12"
Exhaust Port (cc) 101cc
Exhaust Port Location Stock
Exhaust Port Dimensions 1.63" x 1.73"
Intake Valve Size 2.08"
Exhaust Valve Size 1.60"
Valve Angle 11°
Valve Spring Pocket O.D. 1.55"
Valve Guide Size 8mm .500" (Top) .560" (Base)
Deck Thickness .750"
Combustion Chamber (cc) 62cc
Spark Plug Size 14mm x .750" Gasket
Spark Plug Location/Angle OE/Angle
