128600101 SPEEDMASTER Billet Iron Engine Block B-4 350 Chevy

Review SPEEDMASTER Chevy Sbc 4-bolt Billet Main Bare Iron Engine Block for CHEVY B-4 350

Introducing the Speedmaster 128600101 Chevy 350 B-4.000 M-350 DH-9.025 4-bolt billet bare iron engine block, a high-performance and durable solution for your hot rod or custom build project. This engine block is designed to deliver maximum power and reliability for your Chevrolet 350 cubic inch small-block engine.

The Speedmaster 128600101 is a billet iron engine block, meaning it is machined from a single piece of cast iron using CNC technology. This manufacturing process ensures superior accuracy and consistency in the block's dimensions and surface finishes. The result is a strong and rigid engine block that can withstand the rigors of high-performance applications.

The block features a 4-bolt main bearing configuration, which provides increased oiling capacity and improved main bearing support compared to traditional 3-bolt designs. This results in greater durability and improved engine performance. The main bearing caps are also machined from billet aluminum, which reduces weight and provides excellent heat dissipation.

The deck height of this engine block is DH-9.025, which makes it ideal for use with high-performance cylinder heads and intake manifolds. The block also includes M-350 cylinder bores, which are oversized to accommodate larger pistons and increase engine displacement.

The block is designed to accept Chevrolet 350 small-block components, including crankshafts, connecting rods, pistons, and cylinder heads. It is also compatible with a wide range of aftermarket performance parts and accessories.

The surface finish of the block is left bare, allowing for easy customization and modification. This makes it an excellent choice for custom builds and hot rod applications where maximum power and unique styling are priorities.

In summary, the Speedmaster 128600101 Chevy 350 B-4.000 M-350 DH-9.025 4-bolt billet bare iron engine block is a high-performance and durable solution for your Chevrolet 350 small-block engine. Its billet construction, 4-bolt main bearing configuration, and oversized cylinder bores make it an excellent choice for high-performance applications, while its bare surface finish allows for easy customization and modification.

The Chevy 350 B-4.000 M-350 DH-9.025 4-bolt billet bare iron engine block, also known as the Speedmaster 128600101, is a popular choice among car enthusiasts and mechanics due to its durability and performance. However, like any other engine component, it has its advantages and disadvantages.

1. High-performance: Billet engine blocks are machined from a single piece of material, ensuring a more precise and uniform design. This results in improved engine performance, strength, and durability.

2. Customizability: Since it is a bare block, you have the freedom to customize it according to your specific needs and preferences. This includes the option to install different types of cylinder heads, camshafts, and other engine components.

3. Lightweight: Iron engine blocks are known for their durability and strength, but they can be quite heavy. A billet iron block, however, offers the same strength but with reduced weight, making it an attractive choice for those who value both power and efficiency.

4. Better cooling: The billet design allows for more cooling fins, which can help improve engine cooling and reduce the risk of overheating.

1. Cost: Billet engine blocks are generally more expensive than standard cast iron blocks due to the manufacturing process involved in creating them.

2. Complex installation: Installing a billet engine block requires more expertise and time than a standard cast iron block. This may result in additional labor costs.

3. Limited availability: Billet engine blocks are not as commonly available as standard cast iron blocks, so you may have to search extensively to find one that fits your specific needs.

The Chevy 350 B-4.000 M-350 DH-9.025 4-bolt billet bare iron engine block offers several advantages, including improved performance, customizability, lightweight design, and better cooling. However, it also comes with some disadvantages, such as a higher cost, complex installation process, and limited availability.

If you are a serious car enthusiast or mechanic looking to build a high-performance engine, a billet iron engine block like the Chevy 350 B-4.000 M-350 DH-9.025 4-bolt may be worth the investment, despite the higher cost and complex installation process. However, if you are on a budget or simply looking for a standard engine block, a cast iron block may be a more practical and cost-effective choice. Ultimately, the decision depends on your specific needs, preferences, and budget.

Details:

Design from the ground up based upon your favourite Bowie block with ability to handle naturally aspirated, supercharged, turbocharged and notorious applications. Max recommended cam journal od: standard sbc - 1.869 plug: 2.375 in. Precision pre-machining is the perfect starting point for a powerful and reliable engine eliminating time expense of blueprinting stock block or ''semi-finished'' factory casting. Bore stroke: 4.185 in.

Bore quantity: sold individually. Best of all can be used with standard off the shelf small block components. Starter: standard sbc. Specs brand: Speedmaster part number: 1-286-001-01 type: engines, bare block cylinder bore diameter: 4.000 in.

Overview if your standard Bowie block could handle 1500 hp it would be Speedmaster h1 engine. Timing chain/gears: standard sbc components.

specifications engineblocksam:

• for models: B-4, 350
• for makes: Chevy
• brand: Speedmaster
• mpn: 128600101
• type: Engine Block
• manufacturer warranty: 1 Year

returns engineblocksam:

• paid by: seller
• policy: returns accepted
• time: 30 days

payments engineblocksam:

• credit card: visa
• other
• wallet: google-pay

seller engineblocksam:

• city: rialto, california
• rating: 99.1%
• # reviews: 1539

shipping engineblocksam:

• service: flat rate freight
• type: fixed
• class: freight

general engineblocksam:

• category: Auto Parts > Car Truck Accessories > Engines > Blocks

offer engineblocksam:

• prices: $2017.89–$2347.01
• item condition: New
• in stock #: 4
• started: november 5, 2025
• options: ship-to-home
• availability: in stock
• sold #: 15