Speedway Motors 3-Inch Offset Inlet/Outlet Chambered Dump Muffler: Durable 16 Gauge Steel
Speedway Motors 3-Inch Offset Inlet/Outlet Chambered Dump Muffler: Durable 16 Gauge Steel
- Offset inlet/outlet design fits many popular over axle exhaust applications
- Welded steel case and internal baffled muffler design for long life
- Multiple baffles provide a deep muscle car exhaust note
- No internal packing materials to blow out over time, changing the muffler’s tone
- Built in 3-inch 3-bolt cut out for exhaust accepts turn downs or electric cutouts
- Built from 16 gauge steel and comes painted in high-temp black
- Block off plate with gasket and hardware included with each muffler
Easily Run Your Exhaust Open or Closed with a Baffled Muffler with Cutout
There’s nothing like the sound of a deep rumble coming from a classic muscle car or pickup truck. The exhaust note often is a make or break deal for enthusiasts, some of which can actually tell what engine is under the hood just by the exhaust. For those that want to “uncork” their exhaust from time to time, be it at the track or for some sort of “sound off” at the local cruise night, the options available usually mean cutting into your exhaust system to place an exhaust cutout of some sort. This custom exhaust work means visiting an exhaust shop and the labor to build these exhaust dumps into your existing exhaust system. We’ve made the whole process so much easier by simply incorporating the cut outs for exhaust directly into our steel baffled muffler with cutout.
Our baffled mufflers are a great value. They are made from .0600-inch thick mild steel (16 gauge), fully welded, and painted with a high-temp black finish. Our mufflers provide a long service life with a deep tone that does not change with age like other mufflers with sound absorption materials that rust or burn out. However, adding a built in industry standard 3-bolt header-style flange to the muffler case makes them an even better deal. Simply replace your existing mufflers with our baffled mufflers with cutouts and you have a built in 3-inch dump flange with 3-bolt block off plate ready to go. Simply add a 3-inch Bolt-On Exhaust Turn Down or combine it with a matching 3-inch Electric Exhaust Cutout Valve to our mufflers with cutouts for the utmost in convenience right from your interior’s console or dash. You can even add Remote Control Electric Exhaust Cutout Kit to your electric cutouts to really wow the crowds at your favorite car events.
Sold individually, each cut out muffler includes a dump flange block off plate, block off plate gasket, and zinc plated 3/8-inch block off plate attaching hardware. We also offer these offset inlet/outlet style mufflers with cutouts in 2-1/4-inch Offset Inlet/Outlet Muffler With Cutout and 2-1/2-inch Offset Inlet/Outlet Muffler With Cutout pipe diameters to match other common Shop Exhaust Tubing tubing sizes.
Replacement Shop 3-Bolt Collector Gaskets are available in several materials, including copper, aluminum, and paper.
Brand: | Speedway Motors |
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Isin: | IYJJPNYUBWQG |

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- Offset inlet/outlet design fits many popular over axle exhaust applications
- Welded steel case and internal baffled muffler design for long life
- Multiple baffles provide a deep muscle car exhaust note
- No internal packing materials to blow out over time, changing the muffler’s tone
- Built in 3-inch 3-bolt cut out for exhaust accepts turn downs or electric cutouts
- Built from 16 gauge steel and comes painted in high-temp black
- Block off plate with gasket and hardware included with each muffler
Easily Run Your Exhaust Open or Closed with a Baffled Muffler with Cutout
There’s nothing like the sound of a deep rumble coming from a classic muscle car or pickup truck. The exhaust note often is a make or break deal for enthusiasts, some of which can actually tell what engine is under the hood just by the exhaust. For those that want to “uncork” their exhaust from time to time, be it at the track or for some sort of “sound off” at the local cruise night, the options available usually mean cutting into your exhaust system to place an exhaust cutout of some sort. This custom exhaust work means visiting an exhaust shop and the labor to build these exhaust dumps into your existing exhaust system. We’ve made the whole process so much easier by simply incorporating the cut outs for exhaust directly into our steel baffled muffler with cutout.
Our baffled mufflers are a great value. They are made from .0600-inch thick mild steel (16 gauge), fully welded, and painted with a high-temp black finish. Our mufflers provide a long service life with a deep tone that does not change with age like other mufflers with sound absorption materials that rust or burn out. However, adding a built in industry standard 3-bolt header-style flange to the muffler case makes them an even better deal. Simply replace your existing mufflers with our baffled mufflers with cutouts and you have a built in 3-inch dump flange with 3-bolt block off plate ready to go. Simply add a 3-inch Bolt-On Exhaust Turn Down or combine it with a matching 3-inch Electric Exhaust Cutout Valve to our mufflers with cutouts for the utmost in convenience right from your interior’s console or dash. You can even add Remote Control Electric Exhaust Cutout Kit to your electric cutouts to really wow the crowds at your favorite car events.
Sold individually, each cut out muffler includes a dump flange block off plate, block off plate gasket, and zinc plated 3/8-inch block off plate attaching hardware. We also offer these offset inlet/outlet style mufflers with cutouts in 2-1/4-inch Offset Inlet/Outlet Muffler With Cutout and 2-1/2-inch Offset Inlet/Outlet Muffler With Cutout pipe diameters to match other common Shop Exhaust Tubing tubing sizes.
Replacement Shop 3-Bolt Collector Gaskets are available in several materials, including copper, aluminum, and paper.

- Brand: Speedway Motors
- Type: Exhaust Mufflers
- Material: Mild Steel
- Inlet Diameter: 3 "
- Outlet Diameter: 3 "
- Manufacturer Part Number: 9301014
- Finish: Black painted
- Item Length: 20.80
- Universal Fitment: Yes
- California Prop 65 Warning: True
- Size: 3 Inch
Processing Time
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Shipping Methods & Estimated Delivery
Shipping Method | Estimated Delivery | Cost |
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Free Shipping (US) | 5–10 business days | Free, available on eligible items |
Standard Shipping (US to US by Item) | 5–10 business days | $6.50 for the first item, $3.00 each additional |
Standard Shipping (From US Warehouse by Weight) | 3–7 business days | Starts at $6.50, increasing by $2 for every additional 4 oz (0.25 lb) up to 1 lb, then by $4 for each additional pound beyond 1 lb. |
Extended Delivery (Ships from Overseas Warehouse) | 10–15 business days | $14.50 for the first item, $4.00 each additional |
Shipping costs vary by product weight, quantity and origin. Exact rates and delivery estimates are displayed on each product page and confirmed during checkout.
Free Shipping
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We accept returns for most items within 30 days of delivery for a full refund.
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Refund Processing
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Mail-in returns using our prepaid label are refunded to the original payment method within 3–5 business days after we receive your return.
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5–7 business days for the return to reach our Returns Center.
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An additional 3–10 business days for your bank to post the refund to your account.
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Return Address
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