1. Car & Truck Engines Used/New Products
  2. sku: 8204972858791711
  3. MOPAR R8258729AC

MOPAR R8258729AC Block Engine

fits make: Mopar. year: 2008–2014.

R8258729ac Mopar Genuine Long Block Engine Remanufactured

( Manufacturer Part Number: R8258729AC ), ( Part Type: Block Engine ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Make: Chrysler ), ( Year: 2008 2009 2010 2011 2012 2013 2014 ), ( Parts Included: Only Part Reference 3 On The Diagram Is Included ), ( Replaces Part Number: R0081224aa, R8258729aa, R8258729ab )

Review MOPAR Genuine Long Block Engine Remanufactured fits 2008–2014

The Mopar R8258729AC Block Engine is a high-performance aftermarket replacement engine specifically designed for Chrysler 300, 300S, and 300C models. This engine is a significant upgrade from the original, delivering improved power, torque, and overall performance.

The heart of this engine is its forged steel crankshaft and connecting rods, which provide enhanced durability and strength. The cylinder blocks are also made of forged steel and feature a counter-boring design for increased cooling and better oil flow. The engine's cylinder heads are CNC-machined for precision and feature a hemispherical combustion chamber design with optimized port flow for maximum power output.

The Mopar R8258729AC Block Engine is equipped with a high-performance camshaft and intake manifold, which help to optimize airflow and fuel delivery for better combustion efficiency. The engine also features a high-performance exhaust system, which includes high-flow catalytic converters and a free-flowing muffler, allowing for improved exhaust flow and reduced backpressure.

The engine comes with a high-performance ignition system, including a set of high-performance spark plugs, ignition coils, and distributor cap and rotor. This system ensures reliable ignition and helps to maximize engine performance.

The Mopar R8258729AC Block Engine is designed to meet or exceed OEM specifications for emissions, meaning it is legal for use on the road. It also comes with a comprehensive 12-month, unlimited mileage warranty for added peace of mind.

In summary, the Mopar R8258729AC Block Engine is a high-performance aftermarket replacement engine that delivers improved power, torque, and overall performance for Chrysler 300, 300S, and 300C models. It features a forged steel crankshaft and connecting rods, forged steel cylinder blocks, high-performance camshaft and intake manifold, and a high-performance ignition system. The engine is also emissions-compliant and comes with a comprehensive warranty.

Buying a Mopar R8258729AC block engine comes with its own set of advantages and disadvantages that potential buyers should consider before making a decision.

Advantages:

1. OEM Quality: The Mopar R8258729AC block engine is an original equipment manufacturer (OEM) part, which means it is built to the same specifications and quality standards as the engine originally installed in the vehicle.

2. Durability: Mopar engines are known for their durability and reliability, which can provide peace of mind and reduce the need for frequent repairs.

3. Warranty: Mopar engines often come with a warranty, providing protection against defects and failures for a certain period of time.

4. Performance: A replacement engine can help improve the performance of a vehicle, especially if the original engine was worn out or damaged.

Disadvantages:

1. Cost: Replacing an engine is a significant investment, and the cost of a new Mopar R8258729AC block engine can be high.

2. Installation: Installing a new engine requires specialized knowledge and tools, which can add to the overall cost and time required for the repair.

3. Time: Engine replacement can be a time-consuming process, as it involves removing the old engine, installing the new one, and making any necessary adjustments and repairs.

4. Availability: Depending on the specific make and model of the vehicle, the availability of a Mopar R8258729AC block engine may be limited, which could result in a longer wait time for the repair.

Conclusion:

The decision to buy a Mopar R8258729AC block engine depends on several factors, including the cost, availability, and the specific needs of the vehicle. While the advantages, such as OEM quality, durability, and performance, can be compelling, the disadvantages, including cost, installation time, and availability, should also be carefully considered. Ultimately, if the vehicle is essential for daily use or if the original engine is causing significant problems, replacing it with a new Mopar engine may be the best option. However, if the cost and time involved are a concern, other repair options or used engines may be worth exploring.

Recommendation:

Before making a decision to buy a Mopar R8258729AC block engine, it is recommended to consult with a trusted mechanics shop or dealership to assess the condition of the vehicle and explore all available repair options. Additionally, researching the specific engine model, its availability, and the associated costs can help inform the decision-making process and ensure that the repair is a sound investment.

Details:

5.Once confirmed you can now enter in the part number Search for parts that fit box and ensure fitment is accurate to your vehicle. 1.Parts must be resalable and in the original packaging. Electrical parts are not returnable

If you would like to return your new, unopened, and uninstalled part. HOW TO CHECK FITMENT To Ensure Fitment Is Correct.

part #: r8258729ac price

  • $7134.50

specifications grokengines:

  • for makes: Mopar
  • for years: 2008-2014
  • mpn: R8258729ac
  • part type: Block Engine
  • genuine oem: Yes
  • manufacturer warranty: 1 Year
  • fitment type: Direct Replacement
  • make: Chrysler
  • year: 2008 2009 2010 2011 2012 2013 2014
  • parts included: Only Part Reference 3 On The Diagram Is Included
  • replaces part number: R0081224aa, R8258729aa, R8258729ab

returns grokengines:

  • time: 30 Days
  • paid by: Seller
  • policy: Returns Accepted

shipping grokengines:

  • class: Freight
  • type: Fixed
  • cost: $0.00
  • service: Flat Rate Freight

offer grokengines:

  • quantity: 1
  • availability: In Stock
  • options: Ship-to-home
  • started: May 16, 2026
  • sold: 0

payments grokengines:

  • wallet: Apple-pay
  • credit card: Discover
  • other

general grokengines:

  • condition: Remanufactured
  • Car Truck Parts Accessories > Engines Engine Parts > Engines

seller grokengines:

  • # reviews: 4995
  • city: Pompano Beach, Florida
  • rating: 99.7%
for makes: mopar, for years: 2008-2014, part type: block engine, genuine oem: yes, manufacturer warranty: 1 year, fitment type: direct replacement, year: 2008 2009 2010 2011 2012 2013 2014, parts included: only part reference 3 on the diagram is included, replaces part number: r0081224aa, r8258729aa, r8258729ab,
manufacturer: chrysler, category: auto parts > car truck parts accessories > engines engine parts > engines, sku: 8204972858791711,

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