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QUALITY STRENGTH PERFORMANCE SINCE 1981<br />
Dart’s PRO1 23° 180cc Platinum series heads<br />
utilize wet flow technology. Independent tests<br />
have demonstrated an average 25 horsepower<br />
gain over the original trend setting PRO1 design.<br />
These 180cc as cast heads out perform many<br />
larger heads in a wide range of applications.<br />
Long wearing Bronze valve guides, screw-in<br />
studs, multi-angle intake seats and hardened,<br />
radiused exhaust seats are standard.<br />
Assemblies include Stainless Steel valves,<br />
premium springs, locks, retainers, studs, guide<br />
plates and seals.<br />
Heads are sold individually.<br />
23°<br />
180cc<br />
QUICK INFO >>><br />
Excellent street, strip, oval track, truck or marine<br />
performance upgrade. Maximum torque and throttle<br />
response from idle to 6,000 RPM. Best for 327-<br />
400 cubic inch engines. Works with most standard<br />
components.<br />
PRO1 23° 180cc - ALUMINUM (Straight Plug Heads)<br />
64cc COMBUSTION CHAMBERS<br />
PART NO. CONFIGURATION FOR USE MAX. LIFT<br />
11120010P Bare Head<br />
11121111P 1.250” Single Springs for Hydraulic Flat Tappet Cam .510”<br />
11121112P 1.437” Dual Springs for Hydraulic Roller or Solid Flat Tappet Cam .620”<br />
72cc COMBUSTION CHAMBERS<br />
PART NO. CONFIGURATION FOR USE MAX. LIFT<br />
11220010P Bare Head<br />
11221111P 1.250” Single Springs for Hydraulic Flat Tappet Cam .510”<br />
11221112P 1.437” Dual Springs for Hydraulic Roller or Solid Flat Tappet Cam .620”<br />
PRO1 23° 180cc - ALUMINUM (Angle Plug Heads)<br />
SMALL BLOCK CHEVY<br />
CAST ALUMINUM CYLINDER HEADS<br />
64cc COMBUSTION CHAMBERS<br />
PART NO. CONFIGURATION FOR USE MAX. LIFT<br />
11110010P Bare Head<br />
11111111P 1.250” Single Springs for Hydraulic Flat Tappet Cam .510”<br />
11111112P 1.437” Dual Springs for Hydraulic Roller or Solid Flat Tappet Cam .620”<br />
72cc COMBUSTION CHAMBERS<br />
PART NO. CONFIGURATION FOR USE MAX. LIFT<br />
11210010P Bare Head<br />
11211111P 1.250” Single Springs for Hydraulic Flat Tappet Cam .510”<br />
11211112P 1.437” Dual Springs for Hydraulic Roller or Solid Flat Tappet Cam .620”<br />
Head parts kit - see page 118.<br />
Uses 3/8” screw-in rocker studs.<br />
7/16” upgrade available.<br />
RECOMMENDED MANIFOLD<br />
42811000 SHP Dual Plane<br />
PRO1 23° 180cc SPECS<br />
Material:<br />
RMR Cast<br />
Aluminum Alloy<br />
Valve Angle: 23° (stock)<br />
Intake Port Volume: 180cc<br />
Intake Valve: 2.020”<br />
Exhaust Valve: 1.600”<br />
Chamber Volume: 64 or 72cc<br />
Plug Types:<br />
Straight or angle<br />
FLOW DATA @ 28” WATER<br />
LIFT INTAKE EXHAUST<br />
.200” 139 117<br />
.300” 194 154<br />
.400” 233 179<br />
.500” 260 195<br />
.600” 269 205<br />
SHORT BLOCKS TOP KITS BLOCKS HEADS MANIFOLDS CRANKSHAFT ACCESS SBC LS BBC SBF HON COATINGS BILLET<br />
Not intended for sale or use with pollution controlled vehicles.<br />
248.362.1188 / DARTHEADS.COM Connect with us socially, search: DART MACHINERY<br />
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