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. Backed by Flowmaster's Lifetime Limited Warranty.
- 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
- FlowFX “straight through” performance muffler delivers a deep, aggressive to moderate performance tone and improves exhaust flow
Information:
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.
Application Summary:
| Year |
Make/Model |
| 2020-2025 |
Chevrolet Silverado 2500 HD |
| 2020-2025 |
Chevrolet Silverado 3500 HD |
| 2020-2025 |
GMC Sierra 2500 HD |
| 2020-2025 |
GMC Sierra 3500 HD |
| Attributes |
| Brand |
Flowmaster |
| CARB (California) Compliant |
Yes |
| California Proposition 65 |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| Catalytic Converter Included |
No |
| Catalytic Converter Quantity |
Not Included |
| Category |
Exhaust, Exhaust |
| Clamping Type |
Flat Band, Flat Band |
| Clamps Included |
Yes, Yes |
| Country of Origin (Primary) |
US |
| Emission Code |
5, 5 |
| Exhaust Series |
FlowFX, FlowFX |
| Exhaust System Kit Type |
Cat-Back, Cat-Back |
| Exhaust Tip Diameter |
4.50, 4.50 |
| Exhaust Tip Finish |
Black Ceramic Coating, Black Ceramic Coating |
| Exhaust Tip Length |
11.00 |
| Exhaust Tip Material |
304 Stainless Steel, 304 Stainless Steel |
| Exhaust Tip Quantity |
2, 2 |
| Exhaust Type |
Cat-Back |
| Exit Position |
Dual Out Side, DOS |
| Finish |
Natural, Natural |
| GTIN |
00090127130155 |
| Gasket Or Seal Included |
No, No |
| Grade Type |
Performance, Performance |
| Hangers Included |
Yes, Yes |
| Harmonized Tariff Code (Schedule B) |
8708925000 |
| Hazardous Material Code |
N |
| Inlet Inside Diameter |
3.500 in. |
| Inlet Type |
Flanged, Flanged |
| Life Cycle Status Code |
Available to Order |
| Material |
409S Stainless Steel, 409 Stainless Steel |
| Mount Type |
Uses Factory Hangers, Uses Factory Hangers |
| Mounting Bracket Included |
No, No |
| Muffler Body Height |
5.00 |
| Muffler Body Length |
18.000 in., 18.00 |
| Muffler Body Length (in) |
18 |
| Muffler Body Material |
409 Stainless Steel, 409 Stainless Steel |
| Muffler Body Shape |
Oval, Oval |
| Muffler Body Width |
10.00 |
| Muffler Color |
Natural, Silver |
| Muffler Flanged Inlet |
No, No |
| Muffler Flanged Outlet |
No, No |
| Muffler Included |
Yes |
| Muffler Inlet Diameter |
3.50, 3.50 |
| Muffler Inlet Diameter (in) |
3.50 |
| Muffler Inlet Inside Diameter |
3.50, 3.50 |
| Muffler Inlet Location |
Centered, Center |
| Muffler Inlet Outside Diameter |
3.63, 3.63 |
| Muffler Material |
409S Stainless Steel, 409 Stainless Steel |
| Muffler Outlet Diameter |
3.00, 3.00 |
| Muffler Outlet Diameter (in) |
3.00 |
| Muffler Outlet Location |
Dual Outlet, Dual |
| Muffler Outlet Quantity |
2, 2 |
| Muffler Overall Length |
24.00, 24.00 |
| Muffler Overall Length (in) |
24 |
| Muffler Part Number |
Kit Only, Kit Only |
| Muffler Quantity |
1, 1 |
| Muffler Series |
FlowFX, FlowFX |
| Muffler Shape |
Oval, Oval |
| Muffler Type |
Absorption, Absorption |
| NAFTA Preference Criterion Code |
B |
| Pipe Color |
Silver, Silver |
| Pipe Material |
409 Stainless Steel, 409 Stainless Steel |
| Product Type |
Exhaust System, Exhaust System |
| SDR Required Flag |
N |
| Sale Category |
Exhaust |
| Single Dual |
Dual, Dual |
| Sound Level |
Moderate, Moderate |
| Spring Bolt Kit Included |
No, No |
| Sub Category |
Exhaust and Tail Pipes, Exhaust and Tail Pipes |
| System Type |
Cat-back, Cat-back |
| Tail Pipe Diameter |
3.500 in. |
| Tail Pipe Outlet Outside Diameter |
3.00, 3.00 |
| Tail Pipe Quantity |
2, 2 |
| Tail Pipe Tapered Outlet |
No, No |
| Tip Cut |
Angle, Angle |
| Tip Diameter |
4.500 in., 4.50 |
| Tip Edge Style |
Rolled, Rolled |
| Tip Finish |
Black Ceramic, Black Ceramic Coating |
| Tip Length |
11, 11.00 |
| Tip Logo |
Embossed, Embossed |
| Tip Material |
304 Stainless, 304 Stainless Steel |
| Tip Quantity |
2.00, 2.00 |
| Tip Shape |
Round |
| Tip Style |
Single Wall, Single Wall |
| Tubing Diameter |
3.000 in., 3.00 |
| Tubing Diameter (IN) |
3.00 |
| Tubing Material |
409S Stainless Steel, 409 Stainless Steel |
| Type |
Cat-Back, Cat-Back |
| Valve Included |
No, No |
| Valve Type |
Not Applicable, Not Applicable |
| Warning |
California Proposition 65, California Proposition 65 |
| part type |
Exhaust System Kit, Exhaust System Kit |
