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FLOWMASTER 818171 21-25 F-150 Exhaust Muffler Outlaw Oval 409S Stainless Steel
- Regular price
- $576.00 USD
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- $576.00 USD
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Description
xFlowmaster · 21 25 F 150 Exhaust Muffler
FLOWMASTER 818171 21-25 F-150 Exhaust Muffler Outlaw Oval 409S Stainless Steel
Exact Flowmaster part number 818171. Review the product details, application guidance and installation considerations below before ordering.
Product Description
Product Description. This Flowmaster« Outlaw Direct-Fit Muffler system is manufactured using durable 409 stainless steel throughout and features 3 Inch mandrel bent pipes for optimum exhaust gas flow. A Flowmaster Outlaw Series muffler is used for an aggressive sound level and maximum performance. Performance increases on the dyno revealed an increase of 16 Horsepower and 21 Feet-Pound at the rear wheels. This system connects directly to the factory dual tail pipes and uses all the existing factory hangers. Exhaust Muffler; Outlaw; Oval 409S Stainless Steel Case; Dual 3 Inch Center Inlet; Dual 3 Inch Dual Outlet; 12.2 Inch Overall Length; Black; Painted . Note With Factory Dual Tailpipes Only. Features & Benefits. 409 Stainless Steel Construction For Extra Durability. Large 3 Inch Mandrel Bent Pipes For Superior Flow And Power. Flowmaster Outlaw Series Muffler Offers Race Proven Performance. Powerful Exhaust Note With An Aggressive Sound Level That's A Perfect Balance Of Sound And Power. Connects Directly To The Factory Dual Tailpipes For A Simple Installation. Limited Lifetime Warranty. Attributes. Universality: Vehicle Specific . Shape: Oval . Inlet Position: Center Single . Inlet Diameter (IN): 3 Inch . Outlet Position: Offset Dual . Outlet Diameter (IN): 3 Inch . Case Diameter (IN): Not Applicable . Case Length (IN): 6-1/2 Inch . Overall Length (IN): 12.2 Inch . Includes Tip: No . Tip Finish: No Tip . Estimated Install Time (Hours): 1 . Color/ Finish: Black Painted . Material: Stainless Steel . Tip Length (IN): No Tip . Tip Diameter (IN): No Tip . Tip Material: No Tip . Installation Instructions. 818171_instructions.pdf . Warranties. fm_warranty_general.pdf .
Features & Benefits
- With Factory Dual Tailpipes Only
- 409 Stainless Steel Construction For Extra Durability
- Large 3 Inch Mandrel Bent Pipes For Superior Flow And Power
- Flowmaster Outlaw Series Muffler Offers Race Proven Performance
- Powerful Exhaust Note With An Aggressive Sound Level That's A Perfect Balance Of Sound And Power
- Connects Directly To The Factory Dual Tailpipes For A Simple Installation
- Limited Lifetime Warranty
- Universality: Vehicle Specific
Compatibility & Applications
- Application must be confirmed using Flowmaster part number 818171.
- Check year, make, model and relevant body, bed, roof, drivetrain or factory-equipment conditions before ordering.
Frequently Asked Questions
More product details & helpful resources
Verified resources retained from the current listing
Why Choose This Product?
It provides the exact Flowmaster configuration identified by part number 818171, helping buyers compare the correct application and package before purchase.
Ideal For
Customers who have verified that Flowmaster part number 818171 matches their required application and configuration.
Order With Confidence From MyTruckPoint
Order by exact manufacturer part number and contact MyTruckPoint before purchase if your vehicle or configuration differs from the application stated above.
Vehicle Fitment
xShipping
xSHIPPING & DELIVERY INFORMATION
Free Shipping
- Eligibility: Orders over $99 in the USA & Canada.
- Exceptions: Oversized or heavy items may incur extra fees (we’ll notify you before shipping).
- Non-Eligible Areas: Vancouver Island, Yukon, NWT, Nunavut, Alaska, Hawaii, Puerto Rico & other U.S. territories.
Fast Shipping
- Processing: Orders placed before 2 PM usually ship the same day.
- Delivery Time: 2–5 business days via Purolator, FedEx, or Loomis Express.
- Note: Delivery may take longer for distant warehouses or inter-warehouse transfers.
Shipping Limitations
- No P.O. Boxes: Please provide a physical address.
- Remote Areas: Free shipping excludes remote regions.
Special Orders & Backorders
- May incur additional handling fees (discussed before shipping).
- You may cancel if costs are too high for a full refund.
Warranty
- For internal damage or missing parts, contact the manufacturer directly for faster service.
- After 30 days, contact the manufacturer first — if unresolved, our team will assist.
Oversized Items
- Shipped via LTL Freight (items over 150 lbs or large dimensions).
- We’ll confirm any added costs before shipping.
- Examples: Large Fridges, Oversize Toolbox or Tanks, Drop in Bed liners, Wheel to Wheel Step bar & Running Boards, Large Roof Cargo Box, Heavy Bumpers, RV Doors, Oversize, Roof Tent, Large gas tank, Oversize Grille Guards, Fifth Wheel Hitch, Sofa , Trailer Axle.
- Special Handling Fees: Items like batteries may incur additional shipping fees.
Returns & Cancellations
In-Stock Items
- Cancel before shipment; once shipped, standard return policy applies.
- 20% restocking fee, excluding oversize item. Both way shipping is customer responsibility under store error.
Backorders / Special Orders
- 5% restocking fee applies if canceled within 30 days.
- Non-cancellable once shipped from the manufacturer.
- Refused Deliveries: Refund minus shipping & restocking fees (excludes special orders).
- Payment Disputes: Chargebacks do not cancel orders — please contact us directly.
Core Fees
- Not included in the purchase price.
- Refundable upon return of the old part in usable condition.
If you have any questions or need assistance, please reach out to us at 800.292.4173 or support@mytruckpoint.ca.
Why Us
xWhy Choose MyTruckPoint?
When it comes to your truck, compromise is not an option. At MyTruckPoint, we deliver the quality, speed, and trust that professionals across Canada depend on every day.
🇨🇦 Trusted Across Canada for 10+ Years
A decade of proven reliability serving truck owners, fleets, and businesses nationwide. We’ve built our reputation by delivering consistent quality and dependable service.
📦 100,000+ Orders Delivered
Over one hundred thousand successful orders — every one backed by accuracy, speed, and customer satisfaction you can count on.
✅ Authorized Dealer of Leading Brands
No knock-offs. No compromises. Only genuine parts from top-tier brands, ensuring performance, safety, and long-term value.
💪 Built for Performance & Durability
Our parts are selected to handle real-world demands — tough jobs, long hauls, and harsh conditions. Because your truck deserves the best.
💰 Competitive Pricing Without Cutting Corners
Premium quality doesn’t have to mean premium prices. We deliver exceptional value so you get more for every dollar spent.
⚡ Fast, Reliable Shipping
Downtime costs money. That’s why we process orders quickly and deliver efficiently — so you can get back on the road faster.
🧠 Expert Support You Can Rely On
Not sure what you need? Our experienced team is here to guide you with honest advice and the right solutions — every time.
🤝 Customer-First Commitment
We stand behind every order. Your satisfaction isn’t optional — it’s our priority.
MyTruckPoint — Trusted by Thousands. Built for the Road.
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