HOLSET 4047745 Racing HE221W 4047746 7CM

( Brand: Holset ), ( Manufacturer Part Number: 4047745 )

Review HOLSET He221 7cm

Introducing the Holset 4047745 HE221W and Holset 4047746 HE221, two high-performance carburetors designed for enthusiasts seeking optimal engine tuning and fuel efficiency. These carburetors, manufactured by Holset, a leading name in fuel systems, are engineered to deliver exceptional power and torque.

The Holset 4047745 HE221W and Holset 4047746 HE221 are 7cm (2.75 inches) in size, making them suitable for a wide range of applications. Their compact design does not compromise on performance; instead, it offers the benefits of a modern carburetor, including smooth idle, improved fuel economy, and responsive throttle.

Both models feature a sophisticated 2-barrel design that allows for precise fuel metering and accurate air-fuel mixture delivery. The Holset HE221 series carburetors employ a venturi design, ensuring efficient fuel atomization and optimal combustion. The result is a powerful, clean-running engine with excellent drivability.

The Holset 4047745 HE221W and Holset 4047746 HE221 are engineered with high-quality materials and meticulously crafted components. The bowls are constructed from durable, corrosion-resistant materials, ensuring long-lasting performance. The carburetors are meticulously calibrated for optimal airflow and fuel delivery, ensuring consistent engine performance.

The Holset HE221 series carburetors also feature adjustable main jets, allowing for fine-tuning of the fuel mixture for various engine conditions. This feature empowers users to optimize engine performance for their specific applications, whether it's for racing, towing, or everyday driving.

The Holset 4047745 HE221W and Holset 4047746 HE221 are compatible with various engine makes and models, making them a versatile choice for enthusiasts. Their sleek, modern design not only enhances engine performance but also adds a touch of style to any engine bay.

In conclusion, the Holset 4047745 HE221W and Holset 4047746 HE221 are high-performance carburetors that deliver optimal engine tuning, fuel efficiency, and power. Their compact 7cm size, sophisticated 2-barrel design, and adjustable main jets make them a versatile and valuable addition to any engine setup. With their durable construction and high-quality components, these carburetors are sure to provide years of reliable, efficient, and powerful performance.

The Holset HE221 series of turbos are popular choices for various automotive applications due to their compact size, high performance, and efficiency. Among the Holset models, the 4047745 and 4047746 variants are frequently discussed in the aftermarket scene. Here's a brief analysis of each turbo and a concluding recommendation.

1. Compact size: This turbo is ideal for smaller engines, as it has a smaller size and lower compressor housing.

2. Wastegate design: The wastegate design allows for better boost control and reduces the risk of pre-detonation.

3. Improved efficiency: The turbocharger features a more efficient compressor wheel and turbine wheel.

1. Limited boost potential: Due to its smaller size, this turbo might not be able to produce the same level of boost as larger turbos.

2. Suitability for specific engines: It is primarily designed for engines with a displacement of around 1.3 to 1.6 liters.

1. Larger size: This turbo has a larger compressor housing, allowing for higher boost potential.

2. Versatility: It can be used on various engines, making it a popular choice for upgraded engines.

1. Larger size: While the larger size offers better boost potential, it may require more clearance and space in the engine bay.

2. Cost: The larger size and higher performance capabilities of this turbo make it more expensive than the 4047745 model.

Both the Holset HE221W 4047745 and HE221 4047746 turbos have their unique advantages and disadvantages. If you're working with a smaller engine or looking for better boost control, the 4047745 model might be the better choice. However, if you're looking for higher boost potential and are willing to pay a premium, the 4047746 model could be the more suitable option. Ultimately, your decision depends on the specific requirements of your automotive project.

Details:

A 4 bolt bookplate will fit but not be secured as well in one corner. For those unfamiliar with this turbo and are going to use it in a custom build, there is pin inside that keeps the core aligned turbine. The flange is a T25. Its the same turbo, they just add a lot of tape and mailing labels.

This listing is for a new Genuine Holset HE221W with 7 cm2 housing. That could be ground down so the section can move but because of way waste gate mounts to compressor housing, it must in line with turbine housing unless you are going modify heavily. These turbos leave double boxed, two per box. This turbo requires a separate 5 bolt bookplate and gasket not included.

If installing on a Mercedes engine, expect to have make modifications oil feed lines, fitting, drain line, flange adapters and compressor housing tubing/interconnects. The oil entry/exit should be as vertical possible. Benz Force sells turbos primarily to customizes/fabricators.

part #: 4047745 prices

• $662.33-$999.00

specifications perfracp:

• brand: Holset
• mpn: 4047745

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• started: May 27, 2026
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