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USD 155.61
Part #: MAG12773

Magnaflow 30" Diesel Muffler 12773

Universal - 4" Inlet/Outlet, 30" Length (Satin Finish)
Part #: MAG12773
★★★★★ ★★★★★ 1 Reviews
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Inlet/Outlet Size: 4in./4in.
Body Shape: 7in. Round
Core Size: 3.5in.
Body Length: 30in.

Material: 100% Stainless Steel - Satin Finish
Body Shape: 7in. Round
Inlet/Outlet Size: 4in./4in. - ID (Inner Diameter)  
Body Length: 30in.
Overall Length: 36in.
Core Size: 3.5in.
Position: Center/Center

Features and Benefits:  THE WIDE OPEN PERFORMANCE DIFFERENCE! MagnaFlow Diesel Performance mufflers are 100% stainless steel and lap-joint welded for solid construction and rugged reliability even in the most extreme conditions. They feature a free-flowing, straight-through perforated stainless steel core, stainless mesh wrap and acoustical fiber fill to deliver that smooth, deep tone. Mufflers are packed tight with this acoustical material unlike some others' products to ensure long life and no sound degradation over time. Backed by a Lifetime Warranty


  • MFG. Number 12773
  • Manufacturer Name MagnaFlow
  • Shipping Weight 26.00 lb.
  • Shipping Length 41 in.
  • Shipping Width 7 in.
  • Shipping Height 8 in.
  • Fuel Type Diesel / Gas
  • UPC 841380001436
  • Warranty Yes
  • Warranty Info Lifetime
  • Prop 65 WARNING: Cancer & Reproductive Harm -


★★★★★ ★★★★★
5.0/5 Stars out of 1 Reviews
(Las Vegas) | June 8th, 2014
I have an 03 ram Quad cab with a long bed with Cummins and I took the stock exhaust off and put a 4" MBRP on it. Great system but too loud in the cab if pulling a trailer. I left the MBRP and added a 30" Magnaflow on it, for a total of 54" of muffler. Between the two it dropped 12db according to phone app. Quiet and loving it. I won't worry about hurting the grand kids hearing. Now running 78 db empty ,84db towing.

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Most Popular Questions

Does the muffler fit over the exhaust pipe or onside it on both sides.
View Staff Answer 
Yup, The Magnaflow 12773 Muffler has a 4" Inner Diameter (ID) so that you can slip 4" O.D. pipe inside of it.
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