877.352.5355 Contact Us Mon-Sat 10a-6p

Flowmaster FlowMonster Muffler 12599-FM

Flowmaster FlowMonster Muffler 12599-FM
Flowmaster FlowMonster Muffler 12599-FMFlowmaster FlowMonster Muffler 12599-FMFlowmaster FlowMonster Muffler 12599-FMFlowmaster FlowMonster Muffler 12599-FMFlowmaster FlowMonster Muffler 12599-FMFlowmaster FlowMonster Muffler 12599-FM
$148.99 ea
NEWARRIVING SOONEstimated Ship Date 08/09/2024 (If Ordered Today)100 Available from HOLLEY PERFORMANCE PRODUCTS as of 07/22/2024
Model: 4005693
Unleash your Monster with FlowMonster chambered mufflers. Hidden beneath your ride lies a powerful creature destined to dominate. FlowMonster chambered mufflers create an aggressive exhaust note giving a powerful voice to your car/truck/SUV. FlowMonster mufflers are constructed of 16-gauge aluminized steel and are 100% MIG welded for maximum strength and durability. The chambered design cancels out unwanted frequencies with no packing producing an aggressive exhaust note that will not change with time. FlowMonster mufflers are coated with high heat resistant silver paint for an aggressive look under your car. Here the Roar with FlowMonster!
  • Produces An Aggressive Sound
  • Internal Design Cancels Out Annoying High Pitch Frequencies
  • Increases Exhaust Flow For Increased Performance
  • Excellent Throttle Response
  • Constructed of Durable 16-Gauge Aluminized Steel
  • Silver Painted Finish
  • Compact Design Accommodates Most Cars/Trucks/SUVs
Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
Installation Notes:
This is a Universal Fit muffler - Not a Direct fit. Some adaption may be required for proper fitment on some applications
About Flowmaster

Manufacturer of performance exhaust systems, mufflers, performance air intakes, turbo boost modules, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.


Download Name File Size



Automotive Item Grade High Performance
Body Height (in) 5
Body Length 22.000 in.
Body Length (in) 22
Body Width (in) 11
California Proposition 65 Required Yes
Color Stainless Steel
Emission Code 5
Finish Natural
Fitment Universal
Inlet Connection Type Pipe Connection
Inlet Diameter (in) 3
Inlet Inside Diameter 3.000 in.
Inlet Outside Diameter 3.000 in.
Inlet Position Dual
Material 409 Stainless Steel
Muffler Series Flowmonster
Muffler Type Absorption / Glasspack
Outlet Connection Type Pipe Connection
Outlet Diameter (in) 3
Outlet Position Dual
Outlet Type Dual
Overall Length (in) 28
Part Type Exhaust Muffler
Reversible Yes
Shape Oval
Sound Level Moderate Sound
Type of Muffler Absorption
Vehicle Type 4/6 CYL Engine
WARNING CA Proposition 65 WARNING: Cancer and Reproductive Harm


Write a Review
* Your Name:
* Email (This will not be displayed)
* Rating:

Ask a question about

Flowmaster FlowMonster Muffler 12599-FM:
Mustang Depot 2024