MerCruiser Exhaust
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Sierra MerCruiser 4.3 V6 Exhaust Manifold & Riser Kit 18-1952-1 18-1976-2
Sierra
$1,308.76 $1,019.99Sierra Exhaust Manifold and Riser Kit for MerCruiser V6 4.3 Liter 2x Manifold 18-1952-1 Replaces: • Osco: 9745 • GLM: 51220 • MerCruiser: 99746A17 • Barr marine: 1-99746 2x Riser Elbow...- Part Number:
- k-sierra262
- Availability:
- In Stock - Ships same or next business day.
$1,308.76 $1,019.99 -
Sierra MerCruiser 4 inch Exhaust Riser Elbow 18-19762 18-1976-1
Sierra
$250.99Sierra 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 -
Sierra MerCruiser Big Block V8 Exhaust Manifold 7.4 454 502 807078t10 807078t08 18-19571 18-1957-2
Sierra
$410.09 $309.99Sierra Replacement Manifold Kit for MerCruiser Big Block V8 454 / 502 Engines 18-1957-2 Comparable Part Numbers: • Osco: 9011A • GLM: 51240 • MerCruiser: 89011A8 , 807078T08 , 807078T10 ,...- Part Number:
- 47-19572
- Availability:
- In Stock - Ships same or next business day.
$410.09 $309.99 -
Sierra MerCruiser 5.7 5.0 350 305 V8 Exhaust Manifold 860246q11 860246A10 860246a15 860246-c 18-1953-2
Sierra
$319.89 $224.99Sierra MerCruiser V8 Center Riser Exhaust Manifold Fits Applications: V-8 305, 350 & 377 Engines from Years 1983-2002 (Port or Starboard Side) Will not work with Dry joint! Replaces: • MerCrusier: 87114, 87114A19,...- Part Number:
- 47-19532
- Availability:
- In Stock - Ships same or next business day.
$319.89 $224.99 -
Sold Out, please call for ETA.
Sierra MerCruiser "14 Degree" dry joint V8 Exhaust Manifold & Riser Kit
Sierra
$1,686.28 $1,229.99New Sierra marine dry joint exhaust Kit with 14 Degree Riser Fits: • 2004 and newer MCM GM V-6 & V-8 (305 350 & 377 cid) engines with dry joint exhaust manifold (s/n 0W310000 and up) • 2002 and newer MIE GM V-8 (350 &...- Part Number:
- k-sierra350dry
- Availability:
- Limited Stock - Please call before ordering.
$1,686.28 $1,229.99 -
SEA-DOG LINE EXHAUST THRU-HULL 3" SS 521130
SEA-DOG LINE
$151.35 $127.99Sea-Dog Line - 521130 EXHAUST THRU-HULL 3 SS EXHAUST THRU-HULL (SEA-DOG LINE) Stainless flap with rubber seal Cast 316 Stainless Hose 3" Length 5-7/8" Alternate - SDG 521130 24-2491 354-521130- Part Number:
- 354-521130
- Availability:
- In Stock - Ships same or next business day.
- A:
- 2-9/16"
- B:
- 5"
- C:
- 5-7/8"
- D:
- 4-1/2"
- E:
- 3"
$151.35 $127.99 -
SEA-DOG LINE EXHAUST THRU-HULL 2-1/2" SS 521125
SEA-DOG LINE
$151.35 $119.99Sea-Dog Line - 521125 EXHAUST THRU-HULL 2-1/2 SS EXHAUST THRU-HULL (SEA-DOG LINE) Stainless flap with rubber seal Cast 316 Stainless Hose 2-1/2" Length 5-7/8" Alternate - SDG 521125 24-2490 354-521125- Part Number:
- 354-521125
- Availability:
- In Stock - Ships same or next business day.
- A:
- 2-9/16"
- B:
- 5"
- C:
- 5-7/8"
- D:
- 4-1/2"
- E:
- 2-1/2"
$151.35 $119.99 -
Sierra MerCruiser 4.3 Liter V6 Exhaust Manifold 99746A17 9975 18-19521
Sierra
$389.89 $292.52Sierra 18-1952-1 Replacement Exhaust Manifold Kit For MerCruiser V6 4.3 Liter 02 and older engines Will not work for dry joint systems Kit Contains: • 1x Exhaust Manifold • 1x Mounting Package • 1x...- Part Number:
- 47-19521
- Availability:
- In Stock - Ships same or next business day.
$389.89 $292.52 -
SEACHOICE EXHAUST GARD COVER-4 (2/CARD 28361
Seachoice
$32.99 $27.04Seachoice - 28361 EXHAUST GARD COVER-4 (2/CARD EXHAUST GUARD COVER) Black rubber with adjustable stainless steel clamp. Flap valve prevents following seas from entering exhaust outlet when stopping or moving slowly. All stainless steel clamps included. ...- Part Number:
- 50-28361
- Availability:
- In Stock - Ships same or next business day.
$32.99 $27.04 -
Sierra EXHAUST FLAPPER 5-6 INCH 18-4458
Sierra
$78.09 $58.82Sierra_47 - 18-4458 EXHAUST FLAPPER 5-6 INCH EXHAUST PROTECTOR VALVE (Sierra) Includes: • Stainless steel hose clamp • Weather resistant rubber flapper valve Replaces OEM No: Volvo# 834438-4 Size 5" & 6" Alternate - SIE...- Part Number:
- 47-4458
- Availability:
- In Stock - Ships same or next business day.
$78.09 $58.82 -
Sierra EXHAUST FLAPPER 4 INCH 18-4457
Sierra
$41.79 $34.99Sierra_47 - 18-4457 EXHAUST FLAPPER 4 INCH EXHAUST PROTECTOR VALVE (Sierra) Includes: • Stainless steel hose clamp. • Weather resistant rubber flapper valve Replaces: MerCruiser 12644A Size 4" Alternate - SIE 4457 18-4457...- Part Number:
- 47-4457
- Availability:
- In Stock - Ships same or next business day.
$41.79 $34.99 -
Sierra EXHAUST FLAPPER 3 INCH 18-4456
Sierra
$40.59 $31.42Sierra_47 - 18-4456 EXHAUST FLAPPER 3 INCH EXHAUST PROTECTOR VALVE (Sierra) Includes: • Stainless steel hose clamp • Weather resistant rubber flapper valve Replaces: MerCruiser 34565A1, A2 Size 3" Alternate - SIE 4456...- Part Number:
- 47-4456
- Availability:
- In Stock - Ships same or next business day.
$40.59 $31.42 -
OEM MerCruiser Exhaust Manifold 90 Drain Plug Elbow Fitting 22-862210a01
Mercury Marine / Quicksilver
$28.99 $23.99OEM 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
$28.99 $23.99 -
OEM MerCruiser V6/V8 Dry Joint Exhaust Riser 1.7" Spacer Kit 865995A01
Mercury Marine / Quicksilver
$784.99 $668.53OEM MerCruiser V6/V8 Dry Joint Exhaust Riser 1.7" Spacer Kit 865995A01 for V6 and V8 engines with (14 degree risers)864309T01, 864309T02 (std cooling)Will work with Dry Joint Exhaust only Includes: • Gaskets • 1.7 inch...- Part Number:
- 710-865995A01
- Availability:
- In Stock - Ships same or next business day.
$784.99 $668.53 -
OEM MerCruiser Exhaust Y-pipe with Flappers 815786 8M0115149 807130a4 807130c 861229c
Mercury Marine / Quicksilver
$1,017.99 $854.99New OEM Y-Pipe Works with many mercruiser engines!part number 807130a4 casting number 807130-c or 861229c Replaces 815786 8M0115149 807130a4 807130c 861229c exhaust Flappers included !- Part Number:
- 710-8M0115149
- Availability:
- In Stock - Ships same or next business day.
$1,017.99 $854.99 -
NEW OEM MerCruiser V6 V8 Exhaust Riser spacer kit 6" 6 inch 93322A12
Mercury Marine / Quicksilver
$717.71 $619.99NEW OEM MerCruiser V6 V8 Exhaust Riser spacer kit 6" 6 inch 93322A12 • For all MerCruiser center riser manifolds • All V6 and all V8 engines from early 80+ • New bolts, gaskets, 6 inch high spacers, nuts and washers Will...- Part Number:
- 710-93322A12
- Availability:
- In Stock - Ships same or next business day.
$717.71 $619.99 -
MerCruiser down Elbow Tube 14478T01
Mercury Marine / Quicksilver
$215.17 $157.20MerCruiser down Elbow Tube 14478T01 Used for converting the 1 peice manifolds!Elbow tube for MerCruiser MODEL 175-205 - V6, GM 229/262 CID (1983 up to 0M SN #) Please confirm fitment of MerCruiser parts with your serial numberPhotos and descriptions...- Part Number:
- 710-14478T01
- Availability:
- In Stock - Ships same or next business day.
$215.17 $157.20 -
OEM MerCruiser V6/V8 Dry Joint Exhaust Riser 6" Spacer Kit (std cooling) 864908A1
Mercury Marine / Quicksilver
$931.50 $784.99OEM (14 degree risers) MerCruiser V6/V8 Dry Joint Exhaust Riser 6" Spacer Kit (std cooling) Fits: • MerCruiser • 4.3L, 5.0L, 5.7L, 6.2L • Part Number#864908A1 Includes: • 2x spacer, all bolts and gaskets...- Part Number:
- 710-864908A1
- Availability:
- In Stock - Ships same or next business day.
$931.50 $784.99 -
MerCruiser straight hose fitting 22-866725 22-863804
Mercury Marine / Quicksilver
$18.30 $15.99MerCruiser straight hose fitting 22-866725 22-863804 22-866725 replaces 22-863804 Please confirm fitment of MerCruiser parts with your serial numberPhotos and descriptions provided via Mercury may not always be accurateAll of our Mercury parts are sold...- Part Number:
- 710-22-866725
- Availability:
- In Stock - Ships same or next business day.
$18.30 $15.99 -
OEM MerCruiser " T " fitting for under manifold 22-863786A1
Mercury Marine / Quicksilver
$49.99 $39.99MerCruiser " 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:
- 710-22-863786A1
- Availability:
- In Stock - Ships same or next business day.
$49.99 $39.99
MerCruiser Exhaust
If you want maximum performance and long-term reliability from your MerCruiser inboard engine, routine maintenance of your exhaust system is essential. Corrosion and normal wear can damage exhaust components, leading to poor performance or even serious engine issues. At PowerBoatSupply.com, you’ll find a wide selection of MerCruiser exhaust system parts—including exhaust manifolds, risers, bellows, and other replacement parts to keep your motor running at its best. We carry OEM MerCruiser parts as well as trusted aftermarket options from Sierra and other leading manufacturers.
MerCruiser Exhaust Risers
The exhaust riser is a critical component that should be inspected regularly as part of routine maintenance. At PowerBoatSupply.com, we stock the latest designs that efficiently collect hot gasses from the engine and cool them with a water-filled jacket. This process improves exhaust flow, boosts engine performance, and extends the lifespan of your motor.
MerCruiser Exhaust Manifolds and Components
Whether you need a new MerCruiser transom assembly, exhaust elbows, gaskets, or bolts, PowerBoatSupply.com is your one-stop shop for high-quality parts. From durable MerCruiser exhaust manifolds to complete MerCruiser outdrives, we provide everything you need for annual maintenance or complete rebuilds. With premium OEM and aftermarket options, you’ll spend less time in the shop and more time on the water. With over 35 years of experience in marine engine parts and service, we know the difference quality makes when you rely on your boat’s engine.
Find Quality MerCruiser Exhaust Parts
Shop our full inventory of MerCruiser exhaust components today and get the parts you need shipped fast, so your boat is always ready for the next adventure.