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Inspired by Dart's championship winning Pro Stock designs, Dart Pro 1 aluminum cylinder heads cover a wide range of applications from street cars and trucks to all-out racing. Heads designed for street performance and mild bracket racing offer excellent mid-range torque and power, and are excellent for heavier vehicles. Competition heads are ideal for maximum effort naturally aspirated, big boost forced induction, or nitrous applications. Dart Marine Pro 1 cylinder heads feature an exclusive chromate surface finish to inhibit corrosion and extend the life of the head. They are also fitted with Inconel exhaust valves to withstand the extended running time and temperatures typical of marine usage. Dart's as-cast ports flow more than many ported designs at a much more affordable price. But they also offer fully CNC-machined heads with every intake port, exhaust runner, valve bowl, and combustion chamber shaped by their 5-axis, computer controlled machining centers to produce compound curves and complex shapes that no human could duplicate with a hand grinder. Available bare or fully assembled, long-wearing bronze valve guides, screw-in studs, multi-angle intake seats with hardened, radiused exhaust seats are standard on most heads. Assemblies typically include stainless steel valves, premium springs, locks, retainers, guide plates, and seals. Many Pro 1 heads include race-proven features such as improved spark plug location, extra-long intake valves, raised exhaust ports, and fast burn chambers. They are offered an extensive variety of valve angles, intake port volumes and shapes, exhaust port locations, valve sizes, and chamber volumes.
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$1,520.33
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$2,164.09
Dart GEN III fully counterweighted crankshafts are built for enhanced bearing load distribution, allowing them to withstand high-boost and high-rpm applications. With eight counterweights (instead of 6), crank is substantially stiffened—which reduces flexing, and thereby puts less stress on the mains. Crank comes in a 4.000 in. stroke with an LS1 or LS7 snout, and has lightening holes in the rod journals to reduce crankshaft inertia weight for faster rotation and improved engine acceleration. Your crankshaft is the backbone of your engine—so choose one that has the quality, features, and price you want: the Dart Gen III fully counterweighted crankshaft. Additional product features: * Extra-strong, 4340 billet one-piece construction * Long and short snouts available * Heavy-duty rod cheeks * Small hole through the rod pin * Rough balanced @ 1780 grams
Not Yet Reviewed
$1,999.99
Dart Pro1 aluminum cylinder heads for GM LS Series small block V8 engines take performance to the next level. They're available bare or assembled, in both cathedral port and square port designs, for applications ranging from street cars and trucks to all-out racing vehicles. Pro1 LS high performance cylinder heads have better airflow, more efficient combustion chambers, and more user-friendly features than production LS castings. Offered in a variety of valve sizes and port volumes with manganese bronze valve guides, they include multi-angle intake seats and radiused exhaust seats to enhance airflow. All Dart Pro1 LS cylinder heads retain stock valve angles, stock valve locations, and stock accessory mounting holes to make installation easy. Virtually everything else has improved!
Not Yet Reviewed
$1,614.99
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$2,146.96
Power your boat like a pro with Dart Pro 1 Marine cylinder heads. Their aluminum cylinder heads are offered bare or assembled for out-of-the-box performance. Pro 1 Marine heads are cast from 355-T61 aerospace alloy with an exclusive chromate finish to inhibit corrosion and provide superior strength and integrity. These Dart cylinder heads have highly efficient chambers with race-proven features, including rolled valve angles, an improved spark plug location, extra-long intake valves, raised exhaust ports, and fast-burn chambers. Assembled heads include super-tough Inconel exhaust valves to withstand the extended running times and temperatures typical of marine usage. Top your boat block with a couple of power makers--Dart Pro 1 Marine aluminum cylinder heads.
Not Yet Reviewed
$1,727.65
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$1,742.78
Dart's Pro1 Mercury Racing cylinder heads are perfect if you need a little more power, and are true bolt-on replacements patterned on professional competition heads. The intake ports are precision-cast from C355-T61 aerospace aluminum, come available with 310cc, 325cc, or 345cc intake runners, and have the correct exhaust bolt pattern for factory manifolds. The yellow chromate surface treatment inhibits salt and corrosion for marine usage. They are available bare or assembled. Choose the right configuration for your motor and any special parts and considerations. Assembled heads also include Inconel exhaust valves to withstand extended running time and temperatures.
Not Yet Reviewed
$1,914.99
Dart Race Series 18 degree cylinder heads (for small block Chevy) delivers features that put you ahead of the competition! Dart refined the rolled valve angle design to give you more versatility, more performance, more reliability and higher quality. Features include: * Premium alloy: Dart aluminum heads are cast from virgin 355-T61 aerospace alloy for superior strength and integrity * Shallow combustion chamber design to improve combustion and allow the use of larger valves for improved airflow * Refined intake port design reduces turbulence and improves air/fuel flow * 67cc as-cast chamber volume can be machined down to 48cc * Interlocking ductile iron valve seats are compatible with stainless steel or titanium valves * Valve seats will accommodate up to 2.180 in. intake and 1.625 in. exhaust valves * Extra thick decks for 9:1 engines can be milled for high compression engines * Integral bosses can be drilled for fuel injection down nozzles * Intake runners can be ported to CNC ported to 250cc
Not Yet Reviewed
$1,634.35
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