PLEASE NOTE - Some products are not immediately available. If your order will be delayed, we will e-mail you or call you and let you know.
E-MAIL US HERE about availability and we will respond quickly! We ship same day if your order was placed by 1:00 PM EST during normal business hours BASED ON AVAILABILITY.
NEXT DAY SHIPPING NOTE - Please see our Shipping Policy SATURDAY OR SUNDAY DELIVERY IS NOT AN OPTION.

MUFFLERS - SILENCERS by Ultra Marine

Boat Mufflers

Do you need a silencer/muffler for your boat? At My Inboard Marine, we have several boat muffler options available. Everything from muffler kits to replacement mufflers. We carry aftermarket mufflers along with original factory equipment.

My Inboard Marine carries brand names including Mastercraft, Supra Moomba, and Tige’. We are confident we carry the parts you are looking for with huge discounts that overpower the competition. We make it our priority to specifically carry top-quality equipment while delivering first-rate customer service.

Have questions about our products? We have answers! Reach out to one of our staff members by emailing us at sales@myinboardmarine.com or by calling us at 803-766-8586. Our professional marine service technicians will respond to you quickly! Grab your boat mufflers from the industry-leading online marine store today. Pro Tip: Get your part number either off the old muffler or from your engine/boat manufacturer/dealer if you are not sure!

For Warranty Information, click HERE for the PDF

PLEASE NOTE: Ultra Marine Mufflers are MADE TO ORDER.

Your order will normally ship within 4 BUSINESS days after you order.

Scroll down for all Mufflers

2014 Muffler Kit Mastercraft - Prostar 5.7 CE Port And Starboard Mufflers With 2 - 35° Fiberglass Elbows 250037
11%
$945.09 $1,064.17
Mastercraft Muffler Kit - 2014 Years Part# 250037 Kit Includes: 1 - Prostar 5.7 CE Port Muffler 1 - Starboard Muffler 2 - 35° Fiberglass Elbows...
2014 Muffler Kit Mastercraft - Prostar 5.7 Port And Starboard Mufflers With 2 - Fiberglass Elbows 250039A
15%
$1,089.00 $1,283.41
Mastercraft Muffler Kit - 2014 5.7L Part# 250039A Kit Includes: 1 - Prostar 5.7L Port Muffler 1 - Starboard Muffler 2 - Fiberglass Elbows Manufactured by...
2014 Muffler Kit Mastercraft - Prostar 6.2 Port And Starboard Mufflers With 2 - 35° Fiberglass Elbows 250038A
19%
$864.13 $1,064.17
Mastercraft Muffler Kit - 2014 6.2L Part# 250038A Kit Includes: 1 - Prostar 6.2L Port Muffler 1 - Starboard Muffler 2 - 35° Fiberglass Elbows Manufactured...
2014 Muffler Mastercraft - 5.7 Standard 214V - X14V Port Side UM-250047AP
17%
$480.05 $581.76
Mastercraft Muffler 2014 Prostar 5.7L Standard 214V &  X14V Port Side Muffler 214V - X14V Part# 250047AP Full Kit Part# 250047A includes both mufflers. Manufactured by Ultra...
2014 Muffler Mastercraft - 5.7 Standard 214V - X14V Starboard Side 250047AS
22%
$455.95 $580.99
Mastercraft Muffler 2014 Prostar 5.7L Standard Starboard Side Muffler 214V & X14V Part# 250047AS Full Kit Part# 250047A includes both mufflers. Manufactured by Ultra Marine. Easy to...
2014 Muffler Mastercraft - 5.7 Standard X10/25/30/46 Port Side 250041BP
17%
$481.72 $581.76
Mastercraft Muffler 2014 5.7L Standard Port Side Muffler X10/25/30/46 Part# 250041BP Full Kit Part# 250041B includes both mufflers. Manufactured by Ultra Marine. Easy to install! Ultra Marine Fine...
2014 Muffler Mastercraft - 5.7 Standard X10/25/30/46 Starboard Side 250041BS
17%
$481.72 $581.76
Mastercraft Muffler 2014 5.7L Standard Starboard Side Muffler X10/25/30/46 Part# 250041BS Full Kit Part# 250041B includes both mufflers. Manufactured by Ultra Marine. Easy to install! Ultra Marine Fine...
2014 Muffler Mastercraft - 5.7 Standard X2 Port Side 250044BP
17%
$481.72 $581.76
Mastercraft Muffler 2014 Prostar 5.7L Standard X2 Port Side Muffler X2 Part# 250044BP Full Kit Part# 250044B includes both mufflers. Manufactured by Ultra Marine. Easy to install! Ultra...
2014 Muffler Mastercraft - 5.7 Standard X2 Starboard Side 250044BS
17%
$481.72 $581.76
Mastercraft Muffler 2014 5.7L Standard Starboard Side Muffler X2 Part# 250044BS Full Kit Part# 250044B includes both mufflers. Manufactured by Ultra Marine. Easy to install! Ultra Marine Fine...
2014 MUFFLER MASTERCRAFT - PROSTAR 6.2L ENGINE 2500381
28%
$405.47 $560.94
Mastercraft Muffler 2014 Prostar 6.2L Engine Part# 2500381 6.2 Prostar 3.5" Inlet wit a 90° angle - 3.5" Outlet Manufactured by Ultra Marine. Easy to install!...
4 Inch Angle Cut Transom Exit Exhaust Tips With Flapper Corsa Performance 11000 4 Inch Angle Cut Transom Exit Exhaust Tips With Flapper Corsa Performance 11000
1%
$394.00 $399.99
Pair of polished stainless steel thru hull exhaust tips fit inboard boats with 4 in. exhaust. 90 degree flange exhaust tips Sold as a pair...
4 Inch. Exhaust Tips With Flapper Corsa® Performance 11050 4 Inch. Exhaust Tips With Flapper Corsa® Performance 11050
4%
$345.00 $359.99
Pair of polished stainless steel exhaust tips fit inboard boats with 4 in. exhaust. ONE PAIR 90 degree flange exhaust tips Full 6 inch diameter...
Black Exhaust Thru Hull with Flapper - 3 Inch Centek 1200299 Black Exhaust Thru Hull with Flapper - 3 Inch Centek 1200299
6%
$155.22 $165.22
Centek Thru Hulls are constructed from compression-molded fiberglass and will not corrode like conventional fitting made from bronze or stainless steel. A weighted rubber flap...
Fiberglass Exhaust Reducer 3.5 Inch to 4 Inch Centek Industries 1200222
8%
$125.00 $135.91
3.5 inch to 4 inch Fiberglass Exhaust Reducer Centek Industries 1200222 SOLD EACH 3.5" to 4" Fiberglass Exhaust Reducer Connects 3.5 in. inside diameter hose...
Flapper Exhaust Protector Valve 3 Inch
53%
$14.90 $31.49
3 Inch Exhaust Flapper Protective Valve With Stainless Steel Clamp Exhaust protector valve mounts on the outside of 3 in. exhaust tip to prevent backflow...
Flapper Exhaust Protector Valve 4 Inch Flapper Exhaust Protector Valve 4 Inch
13%
$32.05 $36.99
4 Inch Exhaust Flapper Protective Valve With Clamp Exhaust protector valve mounts on the outside of 4 in. exhaust tip to prevent backflow of water...
Flapper Exhaust Protector Valve With Clamp 5 & 6" SIERRA-18-4458 Flapper Exhaust Protector Valve With Clamp "5 & 6" SIERRA-18-4458 - CLEARANCED
9%
$70.00 $77.19
Exhaust protector valve mounts on the outside of 5 in. & 6 in. exhaust tip to prevent backflow of water into the exhaust. For 5...
Muffler <b>Supra-Moomba 104378</b> Interchangeable Angled 3-1/2 Inch 60° O.D. Inlet 3 Inch O.D. Straight Outlet 34 Inches OEM 4207 Muffler <b>Supra-Moomba 104378</b> Interchangeable Angled 3-1/2 Inch 60° O.D. Inlet 3 Inch O.D. Straight Outlet 34 Inches OEM 4207
45%
$345.00 $621.69
Ultra Marine - Muffler Supra-Moomba 104378 Muffler Number: 104378 Supra-Moomba Interchangeable - PORT or STARBOARD UM-4207 Angled 60 Degree 3-1/2" Inlet With 3" Straight Outlet 33"...
Muffler Interchangeable 13" Ultra Straight 3-1/2 Inch O.D. Inlet With 3-1/2 Inch O.D. Straight Outlet 13 Inches Long OEM UM-289-3120
32%
$275.00 $401.99
Ultra Marine - Muffler Aftermarket Interchangeable UM-289-3120 Ultra Straight 3-1/2" Inlet With 3-1/2" Straight Outlet 13" Tip to Tip 3-1/2" in - 3-1/2" out Some...
Muffler Interchangeable Angled 3 Inch O.D. 60° Inlet With 3 Inch  O.D. Straight Outlet 24 Inches Long OEM UM-2015
24%
$315.00 $413.32
Ultra Marine - Muffler Aftermarket Interchangeable UM-2015 60 Degree <NOT 45 degree> Angled 3" Inlet With 3" Straight Outlet 3" Angled 60 Degree Inlet 3"...
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