fits model: 454, Mercruiser.

( Brand: Glm ), ( Manufacturer Part Number: 39890 ), ( Part Type: Block Exhaust Manifold ), ( California Prop 65 Warning: This Product Contains Chemicals Known To The State Of California To Cause Cancer And Reproductive Harm. )
The 39890 Big Block Exhaust Manifold Kit Riser is an essential upgrade for any 454 or 502 Mercruiser GLM engine, designed to enhance performance and durability. This exhaust manifold kit riser is specifically designed for 7.4 and 8.2 liter big block engines, providing a direct fit for seamless installation.
The kit itself is crafted from high-quality steel, ensuring strength and reliability under even the most demanding conditions. The riser design allows for improved exhaust flow, reducing back pressure and maximizing power output. The manifold's smooth, polished finish not only looks great but also promotes better gas flow, further enhancing engine performance.
The 39890 Big Block Exhaust Manifold Kit Riser comes with all necessary hardware for a straightforward installation process. The kit includes new gaskets and bolts, ensuring a secure and leak-free fit. The kit is also compatible with various exhaust systems, giving you the flexibility to choose the best option for your specific setup.
Investing in the 39890 Big Block Exhaust Manifold Kit Riser is an excellent way to boost your engine's performance and reliability. With its robust construction, efficient design, and easy installation, this kit is a smart choice for any 454 or 502 Mercruiser GLM engine owner looking to take their performance to the next level.
Pros of buying a 39890 Big Block 7.4/8.2 Exhaust Manifold Kit Riser for Mercruiser GLM:1. Compatibility: This kit is specifically designed for Mercruiser GLM engines, ensuring a perfect fit and proper functionality.
2. Upgrade potential: Replacing the old exhaust manifold with this new kit can potentially improve engine performance, increasing horsepower and torque.
3. Durability: The kit is made of high-quality materials, ensuring longevity and resistance to corrosion.
4. Easy installation: The kit comes with clear instructions and required hardware, making the installation process straightforward for DIYers.
Cons of buying a 39890 Big Block 7.4/8.2 Exhaust Manifold Kit Riser for Mercruiser GLM:1. Cost: The kit may be more expensive than the original OEM part, which could be a significant expense for some.
2. Requires specific tools: Some specialized tools may be needed for the installation process, which could either be purchased or rented.
3. Potential for engine damage: If not installed correctly, the new exhaust manifold kit could potentially cause harm to the engine, so proper installation is crucial.
Recommendation:If you own a Mercruiser GLM engine and are looking to improve engine performance, the 39890 Big Block 7.4/8.2 Exhaust Manifold Kit Riser is a potential solution. The kit's compatibility, upgrade potential, and durability are significant advantages, and the installation process is relatively straightforward for DIYers. However, consider the high cost and the need for specific tools before making a decision. If you feel comfortable with the installation process and the cost, this kit could be a worthwhile investment in improving your engine's performance. If not, it may be wise to consult a professional mechanic who can help you weigh the pros and cons and ensure a proper installation.
Gasket kit for Mercruiser engines. Includes manifold to head gaskets and elbow for both sides.