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Mercruiser 74-454-502 Exhaust Parts

Mercruiser 74-454-502 Exhaust Parts

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  • OEM MerCruiser 454 / 7.4  Manifold mounting bolt 10-37612

    OEM MerCruiser 454 / 7.4 Manifold mounting bolt 10-37612

    Mercury Marine / Quicksilver

    $2.40 $1.86
    New OEM MerCruiser Big block manifold mounting bolt 454 /502 Each manifold requires 8 of these bolts
    Part Number:
    710-10-37612
    Availability:
    In Stock - Ships same or next business day.
    $2.40 $1.86
    Qty in Cart: 0
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    $2.40 $1.86
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  • OEM MerCruiser 4" Exhaust Riser elbow mounting bolt 10-43749

    OEM MerCruiser 4" Exhaust Riser elbow mounting bolt 10-43749

    Mercury Marine / Quicksilver

    $8.50 $6.59
    OEM MerCruiser Exhaust Riser mounting bolts Fits 4.3 , small block, and big block MerCruiser engines with 4" Riser Elbows Will not work for dry joint (2002+) Not for riser mounted remote oil filter! see other listings
    Part Number:
    710-10-43749
    Availability:
    In Stock - Ships same or next business day.
    $8.50 $6.59
    Qty in Cart: 0
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    $8.50 $6.59
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  • Sold out - Special order may be available, please call 856-232-6969 ext1
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    OEM MerCruiser Full Flow Riser Elbow Gasket 27-863726

    OEM MerCruiser Full Flow Riser Elbow Gasket 27-863726

    Mercury Marine / Quicksilver

    $17.40 $12.43
    OEM MerCruiser Full Flow Riser Elbow Gasket 27-863726 Factory gasket that goes between the manifold and riser. Used on GM V6 and V8 engines. This is the Completely open gasket for Full Flow engines only! Exhaust elbow gasket 863726 is the standard...
    Part Number:
    710-27-863726
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    In Stock - Ships same or next business day.
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    $17.40 $12.43
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  • OEM MerCruiser Restricted Riser Elbow to Manifold Gasket 27-863724

    OEM MerCruiser Restricted Riser Elbow to Manifold Gasket 27-863724

    Mercury Marine / Quicksilver

    $17.60 $13.11
    OEM MerCruiser Restricted Riser Elbow Gasket 27-863724 Exhaust elbow gasket 863724 is the standard cooling, restrictor gasket. This gasket is for use on V-6 and V-8 MerCruiser stern drives and inboard engines (1981 through 1997) made by General motors...
    Part Number:
    710-27-863724
    Availability:
    In Stock - Ships same or next business day.
    $17.60 $13.11
    Qty in Cart: 0
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    $17.60 $13.11
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  • OEM MerCruiser Block off riser elbow Gasket 27-8637251

    OEM MerCruiser Block off riser elbow Gasket 27-8637251

    Mercury Marine / Quicksilver

    $18.90 $14.08
    OEM MerCruiser Block off riser elbow Gasket 27-8637251 Factory gasket that goes between the manifold and riser. Used on GM V6 and V8 engines. This is the Completely blocked off gasket for closed cooling engines only! Exhaust elbow gasket 8637251 is...
    Part Number:
    710-27-863725 1
    Availability:
    In Stock - Ships same or next business day.
    $18.90 $14.08
    Qty in Cart: 0
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    $18.90 $14.08
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  • OEM Quicksilver/Mercury Exhaust Flapper/Shutter 807166A1

    OEM Quicksilver/Mercury Exhaust Flapper/Shutter 807166A1

    Mercury Marine / Quicksilver

    $96.92 $82.99
    OEM Quicksilver/Mercury Exhaust Flapper/Shutter 807166A1 Stern drive exhaust water shutter 807166A1 is for use on MerCruiser stern drives to keep following seas/water from washing back into the exhaust system and into the engine when engine is not...
    Part Number:
    710-807166A 1
    Availability:
    In Stock - Ships same or next business day.
    $96.92 $82.99
    Qty in Cart: 0
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    $96.92 $82.99
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  • OEM MerCruiser DRY JOINT Restricted riser elbow Gasket 27-864850a02

    OEM MerCruiser DRY JOINT Restricted riser elbow Gasket 27-864850a02

    Mercury Marine / Quicksilver

    $58.25 $49.99
    OEM MerCruiser DRY JOINT Restricted riser elbow Gasket 27-864850a02 Exhaust elbow gasket 864850A02 is for use on 2002 and newer V-6 and V-8 MerCruiser stern drive and inboard engines with dry joint exhaust manifolds. This is a restrictor style gasket...
    Part Number:
    710-27-864850A02
    Availability:
    In Stock - Ships same or next business day.
    $58.25 $49.99
    Qty in Cart: 0
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    $58.25 $49.99
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  • OEM MerCruiser 7.4 / 454 / 502 Exhaust Manifold and Riser kit 807078T08 807988Q03

    OEM MerCruiser 7.4 / 454 / 502 Exhaust Manifold and Riser kit 807078T08 807988Q03

    Mercury Marine / Quicksilver

    $1,333.00 $1,161.96
    OEM MerCruiser 454 and 502 Exhaust Kit Fits: • 454 and 502 center riser style engines with 4 inch risers • Approx. 1983-2002 Includes: • 2x OEM MerCriuser Manifold 807078T08 Replaces 807078T10 ...
    Part Number:
    K-OEM454
    Availability:
    In Stock - Ships same or next business day.
    Coating:
    E-Coated
    Engine Size:
    Big Block V8 (454 and 502)
    Generation:
    Wet Joint (86-2002)
    $1,333.00 $1,161.96
    Qty in Cart: 0
    Price:
    $1,333.00 $1,161.96
    Buy this product to earn $34.86 in Store Credit
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  • OEM MerCruiser 4" E-Coated 7 Degree Riser/Elbow  807988Q03

    OEM MerCruiser 4" E-Coated 7 Degree Riser/Elbow 807988Q03

    Mercury Marine / Quicksilver

    $249.92 $213.99
    OEM MerCruiser 4" E-Coated 7 Degree Riser/Elbow  807988Q03 Fits MerCruiser GM V6 & V8 engines with center rise outlet exhaust manifold (approx 2002 & older) Replaces OEM#:807988A2 , 807988q03, 807988-c, 807988A03, 807988A 2, 807988A2,...
    Part Number:
    710-807988Q03
    Availability:
    In Stock - Ships same or next business day.
    Coating:
    E-Coated
    $249.92 $213.99
    Qty in Cart: 0
    Quantity:
    Price:
    $249.92 $213.99
    Buy this product to earn $6.42 in Store Credit
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  • OEM MerCruiser Exhaust Riser Spacer Kit 3"  93320A13 (4x full flow gaskets)

    OEM MerCruiser Exhaust Riser Spacer Kit 3" 93320A13 (4x full flow gaskets)

    Mercury Marine / Quicksilver

    $470.50 $470.49
    NEW OEM MerCruiser 3 inch spacer kit Exhaust riser kit 93320A13 is for use on MerCruiser V-6 TBI stern drive engines with 2-piece exhaust manifolds (serial number 0M614999 and below). Will also fit on MerCruiser stern drive and inboard tow sports V-8...
    Part Number:
    710-93320A13
    Availability:
    In Stock - Ships same or next business day.
    $470.50 $470.49
    Qty in Cart: 0
    Quantity:
    Price:
    $470.50 $470.49
    Buy this product to earn $14.11 in Store Credit
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  • OEM MerCruiser DRY JOINT riser elbow Full Flow Gasket 27-864547a02

    OEM MerCruiser DRY JOINT riser elbow Full Flow Gasket 27-864547a02

    Mercury Marine / Quicksilver

    $58.17 $49.99
    OEM MerCruiser DRY JOINT riser elbow Full Flow Gasket 27-864547a02 Exhaust elbow gasket 864547A02 is for use on 2002 and newer V-6 and V-8 MerCruiser stern drive and inboard engines with dry joint exhaust manifolds. See your owner's manual or service...
    Part Number:
    710-27-864547A02
    Availability:
    In Stock - Ships same or next business day.
    $58.17 $49.99
    Qty in Cart: 0
    Quantity:
    Price:
    $58.17 $49.99
    Buy this product to earn $1.50 in Store Credit
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  • OEM MerCruiser 454 /502/7.4 E-Coated Exhaust Manifold 807078T10 807078T08

    OEM MerCruiser 454 /502/7.4 E-Coated Exhaust Manifold 807078T10 807078T08

    Mercury Marine / Quicksilver

    $416.58 $356.99
    OEM MerCruiser 454 / 502 / 7.4 Manifold 807078T08 OEM MerCruiser E-Coated Exhaust Manifold Exhaust manifold 807078T08 is for use on the port or starboard (left or right) side of V-8 MerCruiser engines made by General Motors. It fits 454 or 502 cid...
    Part Number:
    710-807078T08
    Availability:
    In Stock - Ships same or next business day.
    Coating:
    E-Coated
    $416.58 $356.99
    Qty in Cart: 0
    Quantity:
    Price:
    $416.58 $356.99
    Buy this product to earn $10.71 in Store Credit
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  • OEM MerCruiser Exhaust Manifold 90 Drain Plug Elbow Fitting  22-862210a01

    OEM MerCruiser Exhaust Manifold 90 Drain Plug Elbow Fitting 22-862210a01

    Mercury Marine / Quicksilver

    $28.00 $23.99
    OEM MerCruiser Exhaust Manifold 90 Drain Plug Elbow Fitting 22-862210a01 Stainless Steel Exhaust Manifold Drain Elbow Kit 862210A01 is for use on V-6 and V-8 MerCruiser stern drive and inboard engines with center rise manifolds. Kit includes the...
    Part Number:
    710-22-862210A01
    Availability:
    In Stock - Ships same or next business day.
    Manufacturer Part Number:
    22-862210a01
    $28.00 $23.99
    Qty in Cart: 0
    Quantity:
    Price:
    $28.00 $23.99
    Buy this product to earn $0.72 in Store Credit
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  • MerCruiser " T " fitting for under manifold 22-863786A1

    MerCruiser " T " fitting for under manifold 22-863786A1

    Mercury Marine / Quicksilver

    $48.25 $41.49
    MerCruiser " T " fitting for under manifold 22-863786A1 Exhaust manifold drain t-fitting 863786A1 is for use on MerCruiser V-6 and V-8 (305, 350 and 377 CID) engines with water drain systems. See your owner's manual, parts listing or service manual for...
    Part Number:
    710-22-863786A 1
    Availability:
    In Stock - Ships same or next business day.
    $48.25 $41.49
    Qty in Cart: 0
    Quantity:
    Price:
    $48.25 $41.49
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  • Sold out - Special order may be available, please call 856-232-6969 ext1
    Sierra MerCruiser 7.4 454 502 Exhaust Manifold & Riser Kit 18-1957-1 18-1957-2 18-1976-2

    Sierra MerCruiser 7.4 454 502 Exhaust Manifold & Riser Kit 18-1957-1 18-1957-2 18-1976-2

    Sierra

    $1,458.76 $1,049.99
    Sierra MerCruiser 7.4 454 502 Big Block V8 Center Riser Exhaust Manifold & Riser Kit 2x Manifold 18-1957-1 SS to 18-1957-2 Replaces • Osco: 9011A • GLM: 51240 • MerCruiser: 89011A8 , 807078T08 ,...
    Part Number:
    k-sierra454
    Availability:
    In Stock - Ships same or next business day.
    Qty in Cart: 0
    Price:
    $1,458.76 $1,049.99
    Buy this product to earn $31.50 in Store Credit
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  • OEM MerCruiser Big Block Manifold to Head Gasket 27-46820

    OEM MerCruiser Big Block Manifold to Head Gasket 27-46820

    Mercury Marine / Quicksilver

    $23.33 $19.99
    OEM MerCruiser Big Block Manifold to Head Gasket 27-46820 Exhaust manifold gasket 46820 is for use on V-8 (454,482, 496, 502 and 540 CID) engines made by General Motors for MerCruiser stern drives and inboards. Will also fit like CID engines used for...
    Part Number:
    710-27-46820
    Availability:
    In Stock - Ships same or next business day.
    $23.33 $19.99
    Qty in Cart: 0
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    Price:
    $23.33 $19.99
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  • MerCruiser Quicksilver Upper Exhaust Tube Y-Pipe Bellow 32-44348001

    MerCruiser Quicksilver Upper Exhaust Tube Y-Pipe Bellow 32-44348001

    Mercury Marine / Quicksilver

    $81.00 $69.49
    MerCruiser EXHAUST BELLOWS (QUICKSILVER) 32-44348001 Exhaust bellows tube 44348001 is for MerCruiser 120, 140 and select V-6 and V-8 MerCruiser stern drive engines. See your owner's manual or service manual for specific application and instructions.
    Part Number:
    710-32-44348001
    Availability:
    In Stock - Ships same or next business day.
    $81.00 $69.49
    Qty in Cart: 0
    Quantity:
    Price:
    $81.00 $69.49
    Buy this product to earn $2.08 in Store Credit
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  • Sierra MerCruiser 4 inch Exhaust Riser Elbow 18-19762 18-1976-1

    Sierra MerCruiser 4 inch Exhaust Riser Elbow 18-19762 18-1976-1

    Sierra

    $250.99
    Sierra MerCruiser 4 inch Exhaust Riser Elbow For most MerCruiser engines V6 and V8 ( 4.3 5.0 5.7 6.2 7.4 )  Applications 7" (4" O.D. Riser) Comes as shown in the pictures with bolts and gaskets...
    Part Number:
    47-19762
    Availability:
    In Stock - Ships same or next business day.
    $250.99
    Qty in Cart: 0
    Quantity:
    Price:
    $250.99
    Buy this product to earn $7.53 in Store Credit
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  • OEM MerCruiser DRY JOINT riser elbow block off Gasket 27-864549a02

    OEM MerCruiser DRY JOINT riser elbow block off Gasket 27-864549a02

    Mercury Marine / Quicksilver

    $53.92 $45.99
    OEM MerCruiser DRY JOINT riser elbow block off Gasket 27-864549a02 Exhaust elbow gasket 864549A02 is for use on 2002 and newer V-6 and V-8 MerCruiser stern drive and inboard engines with dry joint exhaust manifolds. This is a block off style gasket. See...
    Part Number:
    710-27-864549A02
    Availability:
    In Stock - Ships same or next business day.
    $53.92 $45.99
    Qty in Cart: 0
    Quantity:
    Price:
    $53.92 $45.99
    Buy this product to earn $1.38 in Store Credit
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74-454-502 Exhaust Parts

NuWave Marine has the quality Mercruiser 7.4-454-502 exhaust parts you need to keep your boat’s engine from breaking down. If one part of the Mercruiser exhaust system is compromised, other parts will also get damaged. Whether it’s one faulty component that needs to be replaced or you're looking to rebuild the whole system, we’ve got all the parts and accessories required, from exhaust manifolds to spacer kits, riser elbows, Y-pipes, and more.

The consensus on exhaust manifolds and risers is that they can last about five years in saltwater applications. In freshwater, however, the lifespan of the exhaust system can rise to 10 years. Most engine manufacturers do not provide an estimate on how long these parts will last. However, with meticulous inspections and proper servicing, you may be able to extend the usual lifespan of your exhaust manifold and riser by 2-3 years.

Mercruiser 7.4 exhaust manifold gasket and other parts

At NuWave Marine, we recommend inspecting your exhaust manifold, gaskets, and riser every year. Look out for signs of heavy corrosion between the manifold and riser and under the exhaust manifold. If the paint is peeling out, then your riser and manifold could be overheating. If you notice any of these signs, your exhaust system likely requires some replacement parts.

Ready to replace worn-out exhaust manifolds? We’ve got the premium parts to do it. Whether you need a Mercruiser 454-502 7.4l head bolt, Mercruiser 7.4 exhaust risers spacer elbows, a “T” fitting for under the manifold, an exhaust bellows, or any other part, you can depend on us for consistent quality, fast shipping, and unmatched customer service.  

Mercruiser 7.4 454 502 exhaust manifold & riser kit

We’ve got spacer kits and more to help you replace and assemble your engine components. The different components in a kit are already engineered to fit together with precision. Mercruiser 7.4-454-502 exhaust kits contain risers, manifolds, gaskets, studs, and spacers to efficiently and cost-effectively rebuild your entire exhaust system. 7.4-454-502 Y pipe parts that come with exhaust flappers to complete the setup.

Choose NuWave Marine for Your Premium Exhaust Parts

NuWave Marine has provided boat owners with premium replacement parts for over four decades. We are ready to use our vast knowledge and experience to help you find the right exhaust part for your engine. Contact us today if you have any questions about which parts you need to keep your boat’s engine purring smoothly for this season and beyond.