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- Speedmaster PCE281.2146 Compatible with Mopar...
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Item #:
89447643
Speedmaster PCE281.2146 Compatible with Mopar and Compatible with Chrysler SB 318 360 170cc 65cc Hydraulic Flat Assembled Cylinder Heads
Item #:
89447643
SCR 18863
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Imported from USA store
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Only 10 items left in stock.
Order now and get it around Sunday, August 02
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If you are looking to build a 400-500+hp engine, give our PCE281.1654 heads a try.
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What Stands Out
Enhanced Performance
The Speedmaster PCE281.2146 cylinder heads boost engine efficiency, providing increased airflow and power with hydraulic flat technology, tailored for Mopar and Chrysler SB 318/360 models.
Precision Engineering
Built with meticulous attention to quality, these assembled heads ensure a perfect fit and reliability, making installation easy for enthusiasts and professionals alike.
Versatile Compatibility
Designed specifically for Chrysler small-block engines, this product is compatible with a range of models, catering to diverse automotive needs while enhancing overall performance.
Product Details
- Assembly Specifications Max Lift: .600 Coil Bind: .1.060 Intake Install: 145lbs @ 1.9 Exhaust Install: 145lbs @ 1.9 Closed Sear Pressure: 145lbs Open Seat Pressure: 360lbs As with all Speedmaster cylinder heads, our Small Block Chrysler heads are Gravity Die Cast . This casting process creates a much more uniform and robust cylinder head. With the increasingly large displacements becoming common, the need for more airflow is necessary. If you are looking to build a 400-500+hp engine, give our PCE281.1654 heads a try. They offer a smaller cross - section to increase the incoming air s velocity, resulting in great driveability, power and economy. On engines over 500hp, use the CNC Ported PCE281.1656 heads. The mid-size cross section works well on larger displacement engines and in and under 7000RPM. If you re looking for more horsepower the PCE281.1658 with their competition valve job fit the bill perfectly. HEAD GASKETS Due to the wide combustion chamber needed to fit around the large 2.02 / 1.60 valves, we recommend Felpro 1008 gaskets will also work with these head/ block combos. . INTAKE GASKETS The PCE281.1488 heads work well with our PCE349.1010 rectangle port gaskets. If you prefer Felpro gaskets, these Chrysler heads take a 1213 gasket, depending on the thickness you require. SPARK PLUGS Our heads require the use of 14mm. x 3/4 reach 5/8 hex gasket seat sparkplugs. Some recommended plugs are; NGK BCPR6ES or R5671A-7, Champion RC12YC, Autolite AR3923 or AR3924. Remember these are for mild street engines. Higher compression or boost requires colder sparkplugs! HEAD BOLTS / STUDS Due to the raised (+.625 ) exhaust port location on our heads, +.100 longer bolts / studs are needed next to each port. Use our PCE279.1017 head stud Kit. Please consult your fastener manufacturer for their specific recommended torque values.
| Manufacturer part number | PCE281.2146 |
| Vehicle model | 318, 340, 360 |
| Vehicle make | Mopar |
| Vehicle fitment type | Universal |
| Brand | Speedmaster |
| Automotive specialty part type | Cylinder Head |
| Features | Compression, Raised |
| Material | Aluminum |
| Color | Natural |
| Weight | 58 lb (26.31 kg) |
| Has written warranty | No |
| Vehicle type | Motor Vehicle |
| Pack quantity | 1 |
Who Should Buy?
-
Mopar Engine Builders
Ideal for builders seeking quality hydraulic flat assembled cylinder heads for Mopar 318 and 360 engines.
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Performance Enthusiasts
Great choice for automotive enthusiasts looking to improve engine performance with upgraded cylinder heads.
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Restoration Projects
Perfect for restorers needing reliable replacement heads for classic Chrysler small-block engines.
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High-Performance Racers
May not satisfy serious racers requiring specialized heads for maximum performance and racing applications.
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Performance Modifiers
Unsuitable for those modifying engines seeking extreme valve sizes or advanced configurations.
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Budget-Conscious Buyers
Cost may be a concern for budget-oriented users, as some alternatives could be cheaper.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What horsepower range can these heads support?
Answer: These cylinder heads are ideal for building 400-500+hp engines. -
Question:
Do I need special gaskets for installation?
Answer: Yes, we recommend using Felpro 1008 gaskets for optimal fit. -
Question:
What type of spark plugs are compatible with these heads?
Answer: 14mm x 3/4 reach gasket seat spark plugs like NGK BCPR6ES or Champion RC12YC are recommended.
Speedmaster Cylinder Heads Editorial Review
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“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
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12 June 2026 · via Trustpilot
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SCR 18863
Order now and get it around Sunday, August 02
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Only 10 items left in stock.
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Fastest cross-border delivery
Features & Benefits
- Designed for Small Block Mopar 318/340/360 engines.
- Max lift of .600 with precision assembly for high performance.
- Enhanced airflow for better power, efficiency, and driveability.
- Recommended for building 400-500+hp engines.
- Compatible with various gaskets and spark plugs for optimal performance.
- Ideal choice for performance enthusiasts seeking reliable upgrades.
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