Flowmaster's FlowFX series mufflers deliver a moderate performance tone for the enthusiast looking for an exhaust note that is different from the "chambered" muffler sound. The interior features a large 3.00-inch "straight-through" stainless steel perforated core, surrounded with high-temperature sound absorption materials delivering a deep traditional mellow tone. The internal flow design is reversible, so the muffler can be installed in either direction to best suit the vehicle application and offsets needed. Features include fully MIG-welded "bright" 409 stainless steel construction with the FlowFX logo embossed on both sides of the case
Flowmaster 71225 FlowFX Muffler 2.25 Offset In, 2.25 Center Out Flowmaster
Flowmaster 71225 FlowFX Muffler 2.25 Offset In, 2.25 Center Out
Sku # 37871225
Mfr. Part # 71225
Condition
New
Brand
Flowmaster
Sold
Each
Details
Flowmaster's FlowFX series mufflers deliver a moderate performance tone for the enthusiast looking for an exhaust note that is different from the "chambered" muffler sound. The interior features a large 3.00-inch "straight-through" stainless steel perforated core, surrounded with high-temperature sound absorption materials delivering a deep traditional mellow tone. The internal flow design is reversible, so the muffler can be installed in either direction to best suit the vehicle application and offsets needed. Features include fully MIG-welded "bright" 409 stainless steel construction with the FlowFX logo embossed on both sides of the case. The FlowFX line of mufflers is perfect for the person looking for a show quality performance muffler at an economical price point and in a compact sized case.
  • Flowmaster quality
  • Straight through design
  • Moderate exterior performance tone
  • Durable fully welded 409S stainless steel case
Specs
Muffler Type
Perforated Tube w/Packing
Inlet Diameter
2.25"
Outlet Diameter
2.25"
Overall Length
20.00"
Overall Width
9.00"
Body Length
14.00"
Overall Height
4.00"
Material Type
409 Stainless Steel
Finish
Natural
Exhaust Tip Included
No
Case Shape
Oval
Inlet Location
Offset
Outlet Location
Center
Outlet Quantity
One
Inlet Quantity
One
MFG. Part #
71225
GTIN Code
700042037483
Sold in Quantity
Each
Reviews

Sound fantastic and great quality

Rated
Product Rating
by JReese on March 26, 2026

Summary: Installed two on a true dual sbc and love the deep sound. Mild at idle but wake right up the second you hit the throttle!

Yes, I recommend this product.

Great buy

Rated
Product Rating
by Rat Rod Relics on November 05, 2022

Summary: Great buy on an awesome muffler

Yes, I recommend this product.

Tech Support
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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.