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4.3L, V-6 Chevy Vortec cylinder head, 8-bolt intake, casting #12557113, OEM GM remanufactured by Michigan Motorz, this is NOT an aftermarket cylinder head.
(1) Cylinder head - sold individually
Item Number: 12557113 |
$459.95 
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5.7L, V-8 Chevy Vortec cylinder head, 8-bolt intake, hardened stylite exhaust seats, casting #906, OEM GM remanufactured by Michigan Motorz, this is NOT an aftermarket cylinder head. Valve covers bolt down center, valves, springs and seals included.
(1) Cylinder head - sold individually
New rocker arms sold separately (set of 8) - click here
Item Number: 906-R |
$349.95
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Temporarily out-of-stock... ETA May 26, 2012
3.0L, 181 c.i., small port, Chevy Vortec cylinder head, 1991-current, casting #620, OEM GM brand new from Michigan Motorz, this is NOT an aftermarket cylinder head.
(1) Cylinder head - sold individually - valves & springs not included.
Quantities limited - quality is unsurpassed!
Item Number: 620 |
$589.00
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5.7L, V-8 Chevy pre-Vortec 1969-86 cylinder head, accepts 12-bolt intake manifold, perimeter-bolt valve covers, American casted & machined brand new from Michigan Motorz. These are the best quality cylinder heads available on the market today.
Chamber 76cc | Valves 1.94"/1.50" | Int. Port 165cc
Hardened stylite exhaust seats for compatability with unleaded fuels
Premium high-density cast iron for maximum power and durability
Screw-in rocker studs, won't pull out
Cylinder heads are casted in the U.S. and are machined in the U.S., this is an American-made product, not junk
Must use self-aligning rockers - not included but available
These are new castings and completely assembled with stainless steel valves, steel exhaust seats, comes with springs, seals, locks and retainers.
(1) Cylinder head - sold individually
New self-aligning rocker arms sold separately (set of 8) - click here
Item Number: 555-1002A |
$409.00
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5.7L, V-8 Chevy pre-Vortec 1987-95 cylinder head, accepts 12-bolt intake manifold (4 inside intake manifold bolts @ 23 degrees), center-bolt valve covers, American casted & machined brand new from Michigan Motorz. These are the best quality cylinder heads available on the market today.
Chamber 76cc | Valves 1.94"/1.50" | Int. Port 165cc
Hardened stylite exhaust seats for compatability with unleaded fuels
Premium high-density cast iron for maximum power and durability
Screw-in rocker studs, won't pull out
Cylinder heads are casted in the U.S. and are machined in the U.S., this is an American-made product, not junk
Must use self-aligning rockers - not included but available
These are new castings and completely assembled with stainless steel valves, steel exhaust seats, comes with springs, seals, locks and retainers.
Will replace head casting #'s 191, 196, 810
(1) Cylinder head - sold individually
New self-aligning rocker arms sold separately (set of 8) - click here
Item Number: 555-1002B |
$385.00
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5.0L, 305 ci, V-8 Chevy Vortec, 1996-current, cylinder head, accepts 8-bolt intake manifold, center-bolt valve covers, American casted & machined brand new from Michigan Motorz. These are the best quality cylinder heads available on the market today.
Hardened stylite exhaust seats for compatability with unleaded fuels
Premium high-density cast iron for maximum power and durability
Screw-in rocker studs, won't pull out
Cylinder heads are casted in the U.S. and are machined in the U.S., this is an American-made product, not junk
Must use self-aligning rockers - not included but available
These are new castings and completely assembled with stainless steel valves, steel exhaust seats, comes with springs, seals, locks and retainers.
(1) Cylinder head - sold individually
Replace GM casting #059
Stainless steel marine performance head gasket included.
New self-aligning rocker arms sold separately (set of 8) - click here
Item Number: 555-1002C |
$395.00
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5.7L, V-8 Chevy Vortec cylinder head, 8-bolt intake, hardened stylite exhaust seats, casting #906, OEM GM brand new from Michigan Motorz, this is NOT an aftermarket cylinder head. Valve covers bolt down center, valves, springs and seals included.
(1) Cylinder head - sold individually
New rocker arms sold separately (set of 8) - click here
Item Number: 906 |
$399.95
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Dart's cast iron cylinder heads for the metric style 8.1 big block engine feature a number of performance improvements. High flowing port designs and efficient combustion chambers greatly enhance power and torque output.
Features:
Premium cast iron alloy.
Improved intake port design improves air flow.
High efficiency chambers for better combustion properties.
Compatible with most stock components.
306cc intake ports.
108cc combustion chambers.
2.19 intake and 1.88 exhaust valve job.
Head sold bare.
(1) Cylinder head - sold individually
Non-returnable
Item Number: 15400170 |
$653.99
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DART's "Iron Eagle" big block Chevy, cast iron, 308 cc cylinder heads offer an affordable alternative to more expensive aluminum heads. The 308 cc heads have high velocity runners which produce incredible torque. Maximum marine performance, mild bracket racing. Under 7,000 rpm, under 500 c.i., excellent mid-range torque and power.
Features:
1.550" dual springs for hydraulic roller or solid flat tappet cam - maximum lift .690".
Valve angles rolled two degrees from stock to reduce chamber volume and improve flow.
Precision machined combustion chambers for optimal burn control.
Inconel exhaust valves for increased durability at high temperatures.
Multi-angle intake seats, radiused exhaust seats and precision cast valve bowls produce excellent air flow without hand porting or expensive CNC machining.
Exhaust ports raised .300 to improve flow.
Manganese bronze intake valve guides ensure long term reliability.
Specifications:
Material: Class 30 iron
Valve Angle: 24° (rolled 2)
Intake Port Vol: 308 cc
Intake Valve: 2.25"
Exhaust Valve: 1.88"
Chamber Vol: 121 cc
Intake Port Shape: Rectangular
Exhaust Port Location: .300" raised
Flow Data @ 28" Water:
Lift
Intake
Exhaust
.200"
157
136
.300"
232
175
.400"
291
210
.500"
325
233
.600"
347
249
.700"
359
258
.800"
363
266
Sold individually - ETA January 15, 2012
Item Number: 15100112M |
$1,156.99
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DART's "Iron Eagle" big block Chevy, cast iron, 345 cc cylinder heads offer increased high lift air flow for large displacement engines. Maximum marine performance, bracket racing, heads up and super classes. Over 7,000 rpm, 540+ c.i.
Features:
1.550" dual springs for hydraulic roller or solid flat tappet cam - maximum lift .690".
Valve angles rolled two degrees from stock to reduce chamber volume and improve flow.
Precision machined combustion chambers for optimal burn control.
Inconel exhaust valves for increased durability at high temperatures.
Multi-angle intake seats, radiused exhaust seats and precision cast valve bowls produce excellent air flow without hand porting or expensive CNC machining.
Exhaust ports raised .300 to improve flow.
Manganese bronze intake valve guides ensure long term reliability.
Specifications:
Material: Class 30 iron
Valve Angle: 24° (rolled 2)
Intake Port Vol: 345 cc
Intake Valve: 2.30"
Exhaust Valve: 1.88"
Chamber Vol: 121 cc
Intake Port Shape: Rectangular
Exhaust Port Location: .300" raised
Flow Data @ 28" Water:
Lift
Intake
Exhaust
.200"
158
136
.300"
228
175
.400"
289
210
.500"
327
233
.600"
358
249
.700"
378
258
.800"
390
266
Sold individually - ETA January 15, 2012
Item Number: 15200132M |
$1,156.99
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DART's Marine Pro 1 Big Block Chevy cylinder heads feature a new, highly efficient chamber with improved fuel distribution, spark plugs located as high and close to the center of the chamber as possible and five angle intake seats to shear the liquid fuel and air as it enters the chamber are the product of wet flow research.
Dart Marine Pro 1 cylinder heads feature an exclusive chromate finish to inhibit corrosion and extend the life of the head, and are fitted with inconel exhaust valves to withstand the extended running time and temperatures typical of marine usage.
Specifications:
Port Volume (Oval) - 275 cc
Chamber Volume - 121 cc
Valves, S/S Intake - 2.190/1.880
Spring Diameter (Hydraulic Roller) - 1.550
Features:
Special hard chromate surface treatment for corrosion and erosion resistance. This treatment is also available on aluminum Dart blocks!
Premium alloy: Dart aluminum heads are cast from virgin 355-T61 aerospace alloy for superior strength and integrity.
Assemblies include super tough inconel exhaust valves for long life.
Bolt on compatibility: 2 degree rolled valve angle and standard spacing. Accommodates all stock accessories.
Heart shaped 121cc chambers improve combustion efficiency.
Raised spark plug location improves flame travel for a quicker, more complete burn, producing more power.
Multi-angle intake seats and radiused exhaust seats dramatically increase airflow.
Hardened exhaust seats are compatible with unleaded gasoline.
Exhaust ports raised .300" to improve flow (requires 1" longer head bolts next to exhaust ports).
Spark plug holes are machined for gasketed 3/4" reach plugs.
Manganese bronze valve guides extend cylinder head life and reduce stem wear.
Sold individually
Item Number: 19000172M |
$1,639.82
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DART's Marine Pro 1 Big Block Chevy cylinder heads feature a new, highly efficient chamber with improved fuel distribution, spark plugs located as high and close to the center of the chamber as possible and five angle intake seats to shear the liquid fuel and air as it enters the chamber are the product of wet flow research.
Dart Marine Pro 1 cylinder heads feature an exclusive chromate finish to inhibit corrosion and extend the life of the head, and are fitted with inconel exhaust valves to withstand the extended running time and temperatures typical of marine usage.
Specifications:
Port Volume (Rectangular) - 310 cc
Chamber Volume - 121 cc
Valves, S/S Intake - 2.250/1.880
Spring Diameter (Hydraulic Roller) - 1.550
Features:
Special hard chromate surface treatment for corrosion and erosion resistance. This treatment is also available on aluminum Dart blocks!
Premium alloy: Dart aluminum heads are cast from virgin 355-T61 aerospace alloy for superior strength and integrity.
Assemblies include super tough inconel exhaust valves for long life.
Bolt on compatibility: 2 degree rolled valve angle and standard spacing. Accommodates all stock accessories.
Heart shaped 121cc chambers improve combustion efficiency.
Raised spark plug location improves flame travel for a quicker, more complete burn, producing more power.
Multi-angle intake seats and radiused exhaust seats dramatically increase airflow.
Hardened exhaust seats are compatible with unleaded gasoline.
Exhaust ports raised .300" to improve flow (requires 1" longer head bolts next to exhaust ports).
Spark plug holes are machined for gasketed 3/4" reach plugs.
Manganese bronze valve guides extend cylinder head life and reduce stem wear.
Sold individually
Item Number: 19100112M |
$1,639.82
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DART's Marine Pro 1 Big Block Chevy cylinder heads feature a new, highly efficient chamber with improved fuel distribution, spark plugs located as high and close to the center of the chamber as possible and five angle intake seats to shear the liquid fuel and air as it enters the chamber are the product of wet flow research.
Dart Marine Pro 1 cylinder heads feature an exclusive chromate finish to inhibit corrosion and extend the life of the head, and are fitted with inconel exhaust valves to withstand the extended running time and temperatures typical of marine usage.
Specifications:
Port Volume (Rectangular) - 325 cc
Chamber Volume - 121 cc
Valves, S/S Intake - 2.250/1.880
Spring Diameter (Hydraulic Roller) - 1.550
Features:
Special hard chromate surface treatment for corrosion and erosion resistance. This treatment is also available on aluminum Dart blocks!
Premium alloy: Dart aluminum heads are cast from virgin 355-T61 aerospace alloy for superior strength and integrity.
Assemblies include super tough inconel exhaust valves for long life.
Bolt on compatibility: 2 degree rolled valve angle and standard spacing. Accommodates all stock accessories.
Heart shaped 121cc chambers improve combustion efficiency.
Raised spark plug location improves flame travel for a quicker, more complete burn, producing more power.
Multi-angle intake seats and radiused exhaust seats dramatically increase airflow.
Hardened exhaust seats are compatible with unleaded gasoline.
Exhaust ports raised .300" to improve flow (requires 1" longer head bolts next to exhaust ports).
Spark plug holes are machined for gasketed 3/4" reach plugs.
Manganese bronze valve guides extend cylinder head life and reduce stem wear.
Sold individually
Item Number: 19200112M |
$1,639.82
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DART's Marine Pro 1 Big Block Chevy cylinder heads feature a new, highly efficient chamber with improved fuel distribution, spark plugs located as high and close to the center of the chamber as possible and five angle intake seats to shear the liquid fuel and air as it enters the chamber are the product of wet flow research.
Dart Marine Pro 1 cylinder heads feature an exclusive chromate finish to inhibit corrosion and extend the life of the head, and are fitted with inconel exhaust valves to withstand the extended running time and temperatures typical of marine usage.
Specifications:
Port Volume (Rectangular) - 345 cc
Chamber Volume - 121 cc
Valves, S/S Intake - 2.300/1.880
Spring Diameter (Hydraulic Roller) - 1.550
Features:
Special hard chromate surface treatment for corrosion and erosion resistance. This treatment is also available on aluminum Dart blocks!
Premium alloy: Dart aluminum heads are cast from virgin 355-T61 aerospace alloy for superior strength and integrity.
Assemblies include super tough inconel exhaust valves for long life.
Bolt on compatibility: 2 degree rolled valve angle and standard spacing. Accommodates all stock accessories.
Heart shaped 121cc chambers improve combustion efficiency.
Raised spark plug location improves flame travel for a quicker, more complete burn, producing more power.
Multi-angle intake seats and radiused exhaust seats dramatically increase airflow.
Hardened exhaust seats are compatible with unleaded gasoline.
Exhaust ports raised .300" to improve flow (requires 1" longer head bolts next to exhaust ports).
Spark plug holes are machined for gasketed 3/4" reach plugs.
Manganese bronze valve guides extend cylinder head life and reduce stem wear.
Sold individually
Item Number: 19300132M |
$1,639.82
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DART's Pro1 Mercury Racing 525 cylinder head comes standard with an exclusive chromate finish that inhibits corrosion and extends the life of the head in marine applications. Assembled heads also include inconel exhaust valves to withstand the conditions typical of marine performance engines.
The DART Pro1 Mercury Racing 525 upgrade cylinder head makes significant improvements to the performance capabilities of the original Merc 525 heads, and adds enhanced durability features as well.
Specifications:
Port Volume - 310 cc
Intake/Exhaust Valves - 2.250/1.880
Spring Diameter (Double) - 1.550
Features:
Premium C355-T61 aerospace aluminum
Exclusive chromate treatment prevents corrosion in marine engines
Assemblies include inconel exhaust valves
Precision cast ports and chambers
Multi-angle intake seats
Hardened and radiused exhaust seats
Bronze valve guides
Sold individually
Item Number: 19100112MMR |
$1,742.10
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DART's Pro1 Mercury Racing 525 cylinder head comes standard with an exclusive chromate finish that inhibits corrosion and extends the life of the head in marine applications. Assembled heads also include inconel exhaust valves to withstand the conditions typical of marine performance engines.
The DART Pro1 Mercury Racing 525 upgrade cylinder head makes significant improvements to the performance capabilities of the original Merc 525 heads, and adds enhanced durability features as well.
Specifications:
Port Volume - 325 cc
Intake/Exhaust Valves - 2.250/1.880
Spring Diameter (Double) - 1.550
Features:
Premium C355-T61 aerospace aluminum
Exclusive chromate treatment prevents corrosion in marine engines
Assemblies include inconel exhaust valves
Precision cast ports and chambers
Multi-angle intake seats
Hardened and radiused exhaust seats
Bronze valve guides
Sold individually
Item Number: 19200112MMR |
$1,742.10
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DART's Pro1 Mercury Racing 525 cylinder head comes standard with an exclusive chromate finish that inhibits corrosion and extends the life of the head in marine applications. Assembled heads also include inconel exhaust valves to withstand the conditions typical of marine performance engines.
The DART Pro1 Mercury Racing 525 upgrade cylinder head makes significant improvements to the performance capabilities of the original Merc 525 heads, and adds enhanced durability features as well.
Specifications:
Port Volume - 345 cc
Intake/Exhaust Valves - 2.300/1.880
Spring Diameter (Double) - 1.550
Features:
Premium C355-T61 aerospace aluminum
Exclusive chromate treatment prevents corrosion in marine engines
Assemblies include inconel exhaust valves
Precision cast ports and chambers
Multi-angle intake seats
Hardened and radiused exhaust seats
Bronze valve guides
Sold individually
Item Number: 19300132MMR |
$1,742.10
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Self-aligning rocker arms, fits MCM/MIE, GM V6 & V8 (283, 305 & 350ci) engines.
Replaces: MerCruiser #35329
Set of 8 - not sold individually
Item Number: 1868 |
$52.80
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