Flowmaster
Flowmaster 2020 GM 2500HD 6.6L CC/SB FFX DOS – 718111
Flowmaster 2020 GM 2500HD 6.6L CC/SB FFX DOS – 718111
SKU:F13718111
Low stock
Couldn't load pickup availability
- Free shipping on $70+
- Ships from US warehouse
- 30-day returns
The Flowmaster 718111 is a set of gm 2500HD 6.6L cc/sb ffx dos.
Key features
- Max increases of up to 9 hp and 10 lb-ft over the stock exhaust at the rear wheels
- 3.50 to dual 3.00-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
- 4.50-Inch black ceramic coated tips add a custom look to the truck
- Includes complete hardware and factory styled hangers in the stock locations for an easy installation
- Flow FX “straight through” performance muffler delivers a deep, aggressive to moderate performance tone and improves exhaust flow
Product details
Fits 2020-2025 GM 2500HD/3500HD 6.6-Liter Gas, Cat-Back, Dual Side Exit, Stainless Steel Exhaust System. This Flowmaster Flow FX cat-back exhaust system for the 2020-2025 GM 2500HD/3500HD trucks with the 6.6-liter gas engine is manufactured using durable 409 stainless steel throughout and features 3.50 to dual 3.00-inch mandrel bent pipes for better exhaust gas flow, and a Flow FX "straight-through" muffler is used for a moderate sound level and maximum performance. Maximum increases on the dyno revealed +9 hp and +10 lb-ft at the rear wheels. This system exits out both sides, behind the rear wheels with 4.50-inch black ceramic tips for added style and a custom look. The system uses all the existing factory hanger locations and includes installation instructions and all necessary hardware for an easy installation that you can do at home. 2020-2025 GM 2500HD/3500HD Trucks with 6.6-liter gas engines. Fits 2 & 4-wheel drive, Crew Cab with 6.5-foot bed only. Does not fit 5th wheel towing packages. Does not fit ZR2 and AT4X packages.
Specifications
| Brand | Flowmaster |
|---|---|
| Manufacturer part number | 718111 |
| Part type | Muffler |
| UPC / GTIN | 90127130155 |
| Weight | 57.75 lb |
| Dimensions (L × W × H) | 58.5 × 16.2 × 11.2 in |
| Category | Engine & Drivetrain |
| Condition | New |
| Returns | 30-day returns on unused items |
Questions
Will this fit my vehicle?
Match the part number 718111 to your current part, or send us your VIN and we'll confirm the fit before you order.
What does shipping cost?
Standard shipping is free on orders of $70 or more to the lower 48 states and DC, and $8 below that. Express is $15 at checkout. Orders ship the same business day when placed early in the day, otherwise the next business day; standard delivery takes 3–5 business days. Alaska and Hawaii are charged by weight at checkout.
Can I return it?
Yes — unused items in the original packaging can be returned within 30 days of delivery. A restocking fee may apply; see our refund policy.
Shipping & delivery
Shipping & delivery
Free standard shipping on orders of $70 or more to the lower 48 states and DC; $8 on smaller orders. Express is $15 at checkout; Alaska and Hawaii are charged by weight. Orders ship from the warehouse closest to you — the same business day, or the next business day if ordered late in the day, on a weekend or holiday. Standard delivery takes 3–5 business days. Oversized items (bumpers, running boards, large tonneau covers, some marine equipment) ship LTL freight — we contact you to schedule delivery and a signature is required.
Returns & warranty
Returns & warranty
Unused, uninstalled parts in original packaging can be returned within 30 days of delivery. A restocking fee of up to 20% may apply depending on the product, and return shipping is the buyer’s responsibility unless the item arrived defective, damaged or incorrect. Items marked Final sale can't be returned. If a part fails, contact us with your order number and we'll help with the manufacturer's warranty claim.
Fitment & part numbers
Fitment & part numbers
Verify fitment with the manufacturer part number shown above and your vehicle’s year, make, model and trim. If the listing says “Fits select…”, confirm your exact application before ordering. Not sure? Send us your VIN and the part number and we’ll check it for you.
