Intake Manifold Gasket – Fits Mercruiser/Volvo Penta Gen V & VI Engines (Replaces 17340)
Intake Manifold Gasket – Fits Mercruiser/Volvo Penta Gen V & VI Engines (Replaces 17340) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Intake Manifold Gasket – Fits Mercruiser/Volvo Penta Gen V & VI...
Product Details
This Intake Manifold Gasket is designed for a precise fit on Mercruiser and Volvo Penta 7.4L/454ci V8 engines (Gen IV, V, and VI), including high-output King Cobra models. It ensures a reliable seal between the intake manifold and cylinder heads, preventing vacuum leaks and maintaining engine performance.
It serves as a direct replacement for Mercruiser 17340, Volvo Penta 17340, and Bombardier Mercruiser/Volvo Penta 17340.
- Engineered for direct-replacement installation.
- Seals the intake manifold to prevent air and coolant leaks.
- Includes one gasket as pictured.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercruiser | 17340 |
| Volvo Penta | 17340 |
| Bombardier | 17340 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercruiser engines, this part fits various 7.4L (454ci) models from Gen IV to Gen VI, including King Cobra variants.
For Volvo Penta engines, this part is used on the 454 (7.4L) models, sharing the same part number as the Mercruiser equivalent.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercruiser | 454 (Gen IV) | 330 | 4-Stroke | 17340 | |
| Mercruiser | 454 (Gen IV) | 335 | 4-Stroke | 17340 | |
| Mercruiser | HIGH OUTPUT KING COBRA (Gen IV) | 370 | 4-Stroke | 17340 | |
| Mercruiser | HIGH OUTPUT KING COBRA (Gen V) | 330 | 4-Stroke | 17340 | |
| Mercruiser | 454 KING COBRA (Gen IV) | 275 | 4-Stroke | 17340 | |
| Mercruiser | 454 KING COBRA (Gen IV) | 295 | 4-Stroke | 17340 | |
| Mercruiser | 454 KING COBRA (Gen IV) | 310 | 4-Stroke | 17340 | |
| Mercruiser | 454 KING COBRA (Gen V) | 295 | 4-Stroke | 17340 | |
| Mercruiser | 454 KING COBRA (Gen V) | 310 | 4-Stroke | 17340 | |
| Mercruiser | 7.4L | 4-Stroke | 17340 | ||
| Volvo Penta | 454 (7.4L) | 4-Stroke | 17340 | Uses same part as Mercruiser |
Technical Specs
- Product Type
- Intake Manifold Gasket
- Installation
- Direct replacement
- Dimensions
- 68.0 cm × 11.5 cm × 1.5 cm (26.8 in × 4.5 in × 0.6 in)
- Weight
- 0.17 kg (0.37 lb)
- Compatible Engines
- 7.4L/454ci V8 Gen IV, V, VI
- OEM Part Number
- 17340
- SKU
- REC17340
What’s in the Box
- 1 x Intake Manifold Gasket (17340)
Installation Notes
- Disconnect the battery and drain the engine coolant completely.
- Remove any components obstructing access to the intake manifold, such as the flame arrestor, fuel lines, and electrical connections. Label everything for reassembly.
- Carefully unbolt the intake manifold from the cylinder heads, following the manufacturer's recommended removal sequence.
- Lift the manifold off the engine and remove the old gaskets.
- Thoroughly clean the mating surfaces on both the cylinder heads and the intake manifold, ensuring they are free of old gasket material, sealant, and debris.
- Position the new intake manifold gaskets correctly on the cylinder heads. Do not use sealant unless specified by the engine service manual.
- Carefully lower the intake manifold back into place, aligning it with the bolt holes.
- Install and tighten the manifold bolts in the correct sequence and to the specified torque values to ensure an even seal.
- Reconnect all previously removed components.
- Refill the cooling system, check for leaks, and start the engine to verify proper operation.
Troubleshooting & FAQ
How do I know if my intake manifold gasket is failing?
Common signs of a bad intake manifold gasket include engine overheating, coolant leaks (often visible near the top of the engine), a rough idle, poor engine performance, and a "check engine" light. You may also notice coolant in the oil (milky appearance) or oil in the coolant.
Will this gasket fit my engine if it's not on the compatibility list?
We only guarantee a fit for the models explicitly listed. While this gasket fits a wide range of Mercruiser and Volvo Penta Gen IV-VI big block engines, you must verify your specific model and part number before ordering.
Is sealant required for this gasket?
Most modern intake manifold gaskets are designed to be installed dry. However, it is critical to consult your engine's specific service manual. Some applications may require a small amount of RTV sealant at the corners or where the manifold meets the engine block.
What is the difference between Gen IV, V, and VI big block engines?
The primary differences relate to the block, cylinder heads, and cooling passages. For example, Gen V and VI engines often have a one-piece rear main seal and different water passage configurations compared to the Gen IV. This gasket is designed to accommodate the specific port and passage layouts of these generations.
Can a bad intake gasket cause serious engine damage?
Yes. A leaking intake gasket can lead to coolant entering the combustion chambers or mixing with engine oil, which can cause catastrophic engine failure if not addressed promptly. It can also cause a lean air-fuel mixture, leading to overheating and detonation.
What is the recommended replacement interval?
There is no fixed replacement interval for an intake manifold gasket. It should be replaced whenever the intake manifold is removed for other service or if any signs of failure are detected.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
