MagnaFlow 3 inch race muffler stainless steel on a white background
Close-up of a car exhaust system with 5x8 high performance muffler for LS exhaust
Close-up of a rock crawler exhaust with straight through muffler for off road exhaust system.
stainless steel muffler for rock crawler build with a magnaflow logo on a white background
side view of a compact race muffler for custom fabrication on a white background
Magna Flow rock crawler muffler with dimensions labeled on a white background
MagnaFlow 3 inch race muffler stainless steel on a white background
Close-up of a car exhaust system with 5x8 high performance muffler for LS exhaust
Close-up of a rock crawler exhaust with straight through muffler for off road exhaust system.
stainless steel muffler for rock crawler build with a magnaflow logo on a white background
side view of a compact race muffler for custom fabrication on a white background
Magna Flow rock crawler muffler with dimensions labeled on a white background

MagnaFlow Exhaust Muffler - 5" x 8" Oval, 3" In/Out, Stainless Steel

14149

$204.00
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Shipping calculated at checkout.

The MagnaFlow 5" x 8" Race Muffler with 3" inlet and outlet is designed for high performance builds that demand both power and sound control. Dyno tested and proven to support horsepower and torque gains, this bi-directional muffler delivers improved exhaust flow while reducing overall sound levels—making it a strong choice for race vehicles, off-road rigs, and aggressive street setups.

Built entirely from stainless steel, including the body, end caps, and perforated core, this muffler is engineered for durability in harsh environments. The straight through design maximizes flow efficiency, while the reversible construction allows for flexible installation in custom exhaust systems. Fully welded and backed by a lifetime warranty, this muffler is built to perform and built to last.

Included Items

  • (1) MagnaFlow 5" x 8" Race Muffler (3" Inlet / 3" Outlet)
Specifications
  • Muffler body size: 5" x 8"
  • Inlet size: 3"
  • Outlet size: 3"
  • Body Height: 5"
  • Body Length: 6"
  • Body Width: 8"
  • Overall Length: 12"
  • Hanger Included: No
  • Straight-through perforated core design
  • Stainless steel body, end caps, and internal core
  • Fully welded with stainless weld bead
  • Reversible for custom installation
  • Designed for high-performance and racing applications
  • Lifetime warranty
Fitment
  • Universal fit for custom exhaust systems
  • Compatible with 3" exhaust tubing
  • Ideal for LS, LT, and other performance engine setups
  • Suitable for off-road, race, and high-performance street vehicles
  • Requires fabrication and welding for installation
Tech Insight

Straight through mufflers are the go-to choice when maintaining exhaust flow is critical. By eliminating internal chambers, this design allows exhaust gases to move freely, supporting horsepower while still taking the edge off sound levels.

The stainless steel construction ensures long term resistance to heat and corrosion, especially in off-road or race conditions. Combined with a compact 5" x 8" body, this muffler gives you the performance you need without taking up unnecessary space in tight chassis layouts.

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