SPEEDWAY MOTORS 91607098 Ls Engine Kit 5.3L 475HP/435TQ

( Brand: Speedway Motors ), ( Manufacturer Part Number: 91607098 ), ( Engine Size: 323 Cu. In. ), ( Type: Crate Engines ), ( California Prop 65 Warning: False )

Review SPEEDWAY MOTORS Ls Gen 5.3l Crate Engine Kit 475hp/435tq Black Aluminum

The Speedway Motors 91607098 LS Gen 5.3L Engine Kit is an excellent choice for those seeking high performance and power in their automotive projects. This kit is designed for the fifth-generation Chevrolet and GMC trucks and SUVs, and it comes with all the essential components required to build a powerful 475 horsepower and 435 lb-ft torque engine.

At the heart of this engine kit is a remanufactured 5.3L V8 LM7 engine block. The block has been meticulously machined and inspected to ensure it meets the highest standards. It is then coated with a high-temp ceramic coating to improve its durability and heat dissipation capabilities. The cylinder bores have been honed to provide a perfect match for the pistons, while the crankshaft and connecting rods have been checked for any signs of wear or damage.

The engine kit comes with a set of forged pistons that are designed to handle the increased power output. These pistons are made from high-strength aluminum alloy and have been machined to precise tolerances. They feature a dish shape to provide better combustion efficiency and a lower compression height to allow for a larger displacement.

The engine kit also includes a set of high-performance LS3 cylinder heads. These heads have been ported and polished to maximize airflow and improve combustion efficiency. They feature 2.02-inch intake and 1.59-inch exhaust valves, which are larger than the stock heads, allowing for more air and fuel to be introduced into the cylinders. The heads have also been equipped with stainless steel valves and hardened valve seats to ensure durability.

The engine kit includes a high-performance camshaft and lifters, which are designed to provide increased valve lift and duration for better power output. The camshaft is made from billet steel and has been ground to provide the desired lift and duration curves. The lifters are made from high-quality materials and have been designed to provide a smooth and reliable operation.

The engine kit also includes a high-performance intake manifold, which has been designed to provide optimal airflow to the engine. The manifold features a large plenum volume and a straight run design to minimize turbulence and maximize airflow. It also comes with a set of 60-pound fuel injectors, which are capable of delivering the required fuel to the engine for optimal performance.

The engine kit includes a high-performance water pump, which has been designed to provide efficient cooling for the engine. The water pump is made from heavy-duty materials and features a thick impeller to improve cooling efficiency. It also comes with a set of heavy-duty water pump pulleys and belts to ensure reliable operation.

The engine kit also includes a set of high-performance ignition components, including a set of spark plugs, ignition coils, and distributor cap and rotor. These components are designed to provide reliable and efficient spark to the engine, ensuring optimal combustion efficiency.

The engine kit comes with a set of high-performance headers, which have been designed to provide efficient exhaust flow and maximize power output. The headers are made from high-quality stainless steel and feature a large primary and secondary collector diameter to improve airflow and reduce backpressure. They also come with a set of high-performance catalytic converters to ensure that the engine meets emissions requirements.

The engine kit also includes a set of high-performance oil pan and pickup, which have been designed to provide efficient oiling for the engine. The oil pan is made from heavy-duty materials and features a baffled design to minimize oil sloshing and ensure consistent oil pressure. The oil pickup is designed to provide efficient oiling to all parts of the engine, even during high RPM operation.

The engine kit comes with all the necessary hardware and gaskets required for installation, making it a complete solution for those seeking to build a high-performance 5.3L V8 engine. The engine kit is backed by Speedway Motors' industry-leading customer support and technical expertise, ensuring that customers have access to the resources they need to complete their project successfully.

In summary, the Speedway Motors 91607098 LS Gen 5.3L Engine Kit is an excellent choice for those seeking high performance and power in their automotive projects. This kit includes a remanufactured engine block, high-performance cylinder heads, forged pistons, high-performance camshaft, intake manifold, fuel injectors, water pump, ignition components, and headers, making it a complete solution for building a powerful 5.3L V8 engine. The engine kit is backed by Speedway Motors' industry-leading customer support and technical expertise, ensuring that customers have access to the resources they need to complete their project successfully.

Pros and Cons of buying a Speedway 91607098 LS Gen 5.3L Engine Kit for 475hp/435tq

a. Power Increase: The engine kit offers a significant power increase of 475 horsepower and 435 lb-ft of torque, which can be an attractive feature for performance enthusiasts.

b. Compatibility: The kit is designed to fit various applications, making it a versatile choice for those looking to upgrade the powertrain in their vehicles.

c. Quality and Reputation: Speedway Motors is a well-known and reputable brand in the automotive aftermarket industry, which can provide peace of mind for customers.

d. Step-by-Step Installation Guide: The kit comes with an installation guide, which can help make the process easier and more straightforward for those who are not professional mechanics.

a. Cost: The engine kit is a significant investment, and the cost may be a barrier for some buyers.

b. Complexity: Installing the engine kit requires a high level of mechanical expertise, and the process can be time-consuming and challenging for those without experience.

c. Compatibility Limitations: While the engine kit is designed to fit various applications, there may be compatibility issues for some vehicles, which could require additional modifications or customization.

d. Potential Performance Trade-offs: While the power increase may be desirable, it could also lead to other performance trade-offs, such as reduced fuel efficiency or increased exhaust emissions.

The Speedway 91607098 LS Gen 5.3L Engine Kit for 475hp/435tq offers a significant power increase and the reputation of a well-known brand. However, it comes with a high cost, requires a high level of mechanical expertise for installation, and may have compatibility limitations or performance trade-offs. Ultimately, the decision to buy the engine kit depends on individual priorities, budget, and mechanical expertise.

If you are looking for a significant power increase and have the budget, mechanical expertise, and the necessary time to install the engine kit, then the Speedway 91607098 LS Gen 5.3L Engine Kit for 475hp/435tq could be a worthwhile investment. However, if you are on a budget, have limited mechanical expertise, or are not confident about the compatibility with your vehicle, it may be worth considering alternative options, such as performance chips or exhaust systems, which can provide some power increase while being less complex and costly.

Details:

V-Band Exhaust Manifolds Serpentine Kit: Cast iron manifolds for 2002 2012 LS engines and a Silver line Series kit with black aluminum components bold, high-performance look. Performance Intake Throttle Body: 6000-8000 RPM intake manifold with a 92mm CNC-machined throttle body for maximum airflow and power. Part # 91607098 Condition New Brand Speedway Motors Sold Kit Details Elevate your GM LS-based engine build with this premium, American-made collection, centered around a high-performance ATK-modified LH6/LC9 5.3L aluminum.

Includes performance components like a 6000-8000 RPM intake manifold, 92mm throttle body, V-band exhaust manifolds, and Silver line Series serpentine kit, this ensures power, reliability, sleek aesthetic.

part #: 91607098 prices

• $6165.99-$9283.99

specifications grokengines:

• brand: Speedway Motors
• mpn: 91607098
• engine size: 323 Cu. In.
• type: Crate Engines
• california prop 65 warning: False

returns grokengines:

• paid by: Buyer
• policy: Returns Accepted
• time: 60 Days

shipping grokengines:

• type: Fixed
• cost: $275.00
• service: Flat Rate Freight
• class: Freight

general grokengines:

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

offer grokengines:

• availability: In Stock
• quantity: 1
• sold: 0
• started: January 29, 2026
• options: Ship-to-home

payments grokengines:

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

seller grokengines:

• city: Lincoln, Nebraska
• # reviews: 347127
• rating: 99.6%

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