Sold out -17% sale
Sierra Not Qualified for Free Shipping Sierra Timing Chain Gasket Set #18-4378
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Sierra Sierra Timing Chain Gasket Set #18-4378 $11.42 $13.63
Sierra 18-4378 Engine GasketsTiming Chain Gasket SetOEM Interchange:MERCURY MARINE: 27-54529A1Sierra Timing Chain Gasket Set #18-4378Normalized SKU: 184378UPC Code: 030999563415
Sold out -22% sale
Sierra Not Qualified for Free Shipping Sierra Overhaul Gasket Set #18-4383
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Sierra Sierra Overhaul Gasket Set #18-4383 $179.84 $228.41
Sierra 18-4383 Engine GasketsOverhaul Gasket SetSierra Overhaul Gasket Set #18-4383Normalized SKU: 184383UPC Code: 030999563460
Sold out -16% sale
Sierra Not Qualified for Free Shipping Sierra Timing Chain Gasket Set #18-4375
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Sierra Sierra Timing Chain Gasket Set #18-4375 $4.57 $5.38
Sierra 18-4375 Engine GasketsTiming Chain Gasket SetOEM Interchange:MERCURY MARINE: 27-34213A2Sierra Timing Chain Gasket Set #18-4375Normalized SKU: 184375UPC Code: 030999563385
Sold out -17% sale
Sierra Not Qualified for Free Shipping Sierra Timing Chain Gasket Set #18-4377
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Sierra Sierra Timing Chain Gasket Set #18-4377 $17.83 $21.28
Sierra 18-4377 Engine GasketsTiming Chain Gasket SetOEM Interchange:MERCURY MARINE: 27-42457A1Sierra Timing Chain Gasket Set #18-4377Normalized SKU: 184377UPC Code: 030999563408
Sold out -17% sale
Sierra Exhaust Manifold Gasket Set #18-4371
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Sierra Sierra Exhaust Manifold Gasket Set #18-4371 $23.08 $27.55
Sierra 18-4371 Engine GasketsExhaust Manifold Gasket SetSierra Exhaust Manifold Gasket Set #18-4371Normalized SKU: 184371UPC Code: 030999563347
-22% sale
Sierra Not Qualified for Free Shipping Sierra Overhaul Gasket Set #18-4373
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Sierra Sierra Overhaul Gasket Set #18-4373 $170.84 $216.98
Sierra 18-4373 Engine GasketsOverhaul Gasket SetSierra Overhaul Gasket Set #18-4373Normalized SKU: 184373UPC Code: 030999563361
-17% sale
Sierra Not Qualified for Free Shipping Sierra Exhaust Manifold Gasket Set #18-4370
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Sierra Sierra Exhaust Manifold Gasket Set #18-4370 $35.50 $42.37
Sierra 18-4370 Engine GasketsExhaust Manifold Gasket SetSierra Exhaust Manifold Gasket Set #18-4370Normalized SKU: 184370UPC Code: 030999563330
-22% sale
Sierra Not Qualified for Free Shipping Sierra Overhaul Gasket Set #18-4374
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Sierra Sierra Overhaul Gasket Set #18-4374 $155.78 $197.86
Sierra 18-4374 Engine GasketsOverhaul Gasket SetSierra Overhaul Gasket Set #18-4374Normalized SKU: 184374UPC Code: 030999563378
-20% sale
Sierra Not Qualified for Free Shipping Sierra Oil Pan Gasket Set #18-4366
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Sierra Sierra Oil Pan Gasket Set #18-4366 $85.83 $106.54
Sierra 18-4366 Engine GasketsOil Pan Gasket SetOEM Interchange:MERCURY MARINE: 27-72479A5Sierra Oil Pan Gasket Set #18-4366Normalized SKU: 184366UPC Code: 030999875808
Sold out -22% sale
Sierra Not Qualified for Free Shipping Sierra Exhaust Manifold Gasket Set #18-4365
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Sierra Sierra Exhaust Manifold Gasket Set #18-4365 $243.85 $309.70
Sierra 18-4365 Engine GasketsExhaust Manifold Gasket SetOEM Interchange:MERCURY MARINE: 27-801855Sierra Exhaust Manifold Gasket Set #18-4365Normalized SKU: 184365UPC Code: 030999621849
Sold out -17% sale
Sierra Not Qualified for Free Shipping Sierra Powerhead Gasket Set #18-4357
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Sierra Sierra Powerhead Gasket Set #18-4357 $54.84 $65.81
Sierra 18-4357 Engine GasketsPowerhead Gasket SetOEM Interchange:MERCURY MARINE: 27-88449A32Sierra Powerhead Gasket Set #18-4357Normalized SKU: 184357UPC Code: 030999318121
-22% sale
Sierra Not Qualified for Free Shipping Sierra Overhaul Gasket Set #18-4359
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Sierra Sierra Overhaul Gasket Set #18-4359 $161.56 $205.20
Sierra 18-4359 Engine GasketsOverhaul Gasket SetOEM Interchange:MERCURY MARINE: 27-815791A92Sierra Overhaul Gasket Set #18-4359Normalized SKU: 184359UPC Code: 808282244309
-20% sale
Sierra Not Qualified for Free Shipping Sierra Powerhead Gasket Set #18-4356
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Sierra Sierra Powerhead Gasket Set #18-4356 $89.89 $111.58
Sierra 18-4356 Engine GasketsPowerhead Gasket SetOEM Interchange:MERCURY MARINE: 27-85653A87Sierra Powerhead Gasket Set #18-4356Normalized SKU: 184356UPC Code: 808282259211
Sold out -20% sale
Sierra Not Qualified for Free Shipping Sierra Powerhead Gasket Set #18-4354
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Sierra Sierra Powerhead Gasket Set #18-4354 $76.56 $95.04
Sierra 18-4354 Engine GasketsPowerhead Gasket SetOEM Interchange:MERCURY MARINE: 27-73645A87Sierra Powerhead Gasket Set #18-4354Normalized SKU: 184354UPC Code: 030999318091
Sold out -17% sale
Sierra Not Qualified for Free Shipping Sierra Powerhead Gasket Set #18-4355
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Sierra Sierra Powerhead Gasket Set #18-4355 $57.98 $69.57
Sierra 18-4355 Engine GasketsPowerhead Gasket SetOEM Interchange:MERCURY MARINE: 27-78028A78Sierra Powerhead Gasket Set #18-4355Normalized SKU: 184355UPC Code: 030999318107
Sold out -17% sale
Sierra Not Qualified for Free Shipping Sierra Powerhead Gasket Set #18-4351
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Sierra Sierra Powerhead Gasket Set #18-4351 $12.40 $14.80
Sierra 18-4351 Engine GasketsPowerhead Gasket SetOEM Interchange:MERCURY MARINE: 27-64203A75Sierra Powerhead Gasket Set #18-4351Normalized SKU: 184351UPC Code: 030999318060
-17% sale
Sierra Not Qualified for Free Shipping Sierra Exhaust Manifold Gasket Set #18-4349
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Sierra Sierra Exhaust Manifold Gasket Set #18-4349 $37.20 $44.40
Sierra 18-4349 Engine GasketsExhaust Manifold Gasket SetSierra Exhaust Manifold Gasket Set #18-4349Normalized SKU: 184349UPC Code: 030999755971
-17% sale
Sierra Not Qualified for Free Shipping Sierra Exhaust Manifold Gasket Set #18-4348
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Sierra Sierra Exhaust Manifold Gasket Set #18-4348 $52.46 $62.95
Sierra 18-4348 Engine GasketsExhaust Manifold Gasket SetSierra Exhaust Manifold Gasket Set #18-4348Normalized SKU: 184348UPC Code: 030999755964
Sold out -17% sale
Sierra Not Qualified for Free Shipping Sierra Head Set #18-4342
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Sierra Sierra Head Set #18-4342 $11.41 $13.62
Sierra 18-4342 Engine GasketsHead SetOEM Interchange:VOLVO: 876376Gaskets: Head Gasket SetSierra Head Set #18-4342Normalized SKU: 184342UPC Code: 808282188788
Sold out -20% sale
Sierra Not Qualified for Free Shipping Sierra Head Set #18-4341
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Sierra Sierra Head Set #18-4341 $120.81 $149.98
Sierra 18-4341 Engine GasketsHead SetOEM Interchange:VOLVO: 876380Gaskets: Head Gasket SetSierra Head Set #18-4341Normalized SKU: 184341UPC Code: 808282188771

Frequently Asked Questions

First Choice Marine is an online marine retailer carrying a diverse line of marine parts and accessories and related items from industry-respected and demanded manufacturers and suppliers. Through our diverse distributor network, we are able to access over 150,000 items, including our current site inventory, new products being added, and special order items. If you need it on your boat... we are your one-stop shop!

Yes, we offer FREE Shipping on most orders over $149 to US-48*.

Each product displays a shipping status message, just above the item price. Below is the meaning for each of these codes.

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  • In-Store Pickup Only: This item can only be picked up in our Grain Valley, MO retail store

Below the price of the item, on the product page, there is a message indicating the availability of the product.

The quantity on hand is updated as inventory events happen and matches what we have available. If you have urgent needs and we are close to what you need, contact us, and we can confirm stock.

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If you need to return an item, please follow the guidelines here so we can process a prompt refund and assist you in finding the correct item.

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