BIGREAT 409 Steel 4'' Inch OD Straight Exhaust Pipe Mandrel Tubing Pipe 48" / 4 Ft Long Custom Fitment For Exhaust System
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Availability:
In Stock.
Arrives
Friday, Mar 27
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Size: 4.0 Inch
Features
- Size:Outsider Diameter: 4.0" Inch; Bending Angle:Straight;Length:48 Inch.
- Materials:Made of High Quality 409 Steel with Computerized Mandrel-Bends for Strength and Durability.
- Easy Install:Each mandrel bent tube is expanded on one end to allow easy slip-fit installation.
- Package Includes:1 X Straight Exhaust Pipe,As Pictures Show Above.
- Applications: Universal Fitment For Exhaust system,Perfect Do It Yourself pipe with plenty of options.
Color: Metallic
Brand: BIGREAT
Material: 409 Steel
Vehicle Service Type: Universal
Product Dimensions: 48.43"L x 4.33"W
Automotive Fit Type: Universal Fit
Manufacturer: BIGREAT
Model: extension pipes
Item Weight: 10.23 pounds
Product Dimensions: 48.43 x 4.33 x 0.1 inches
Item model number: exhaust pipe
Exterior: Machined
Manufacturer Part Number: BR0246
Date First Available: June 5, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Mar 27
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 2.0 Inch
Heavy metal very pleased
Reviewed in the United States on December 22, 2025 by Dianne McKinley
Size: 2.0 Inch
Worked fine for the price. Easy to work with.
Reviewed in the United States on November 5, 2025 by Jared Paulson
Size: 3.5 Inch
Perfect fit did exactly what I needed it to do.
Reviewed in the United States on September 22, 2025 by Carrie Allen
Size: 5.0 Inch
Pipe sound good on truck
Reviewed in the United States on October 10, 2025 by Brandon j
Size: 4.0 Inch
This bar was cut perfectly to size, is good enough for any exhaust work you may be planning. 409 isn't the best stainless against corrosion but you can't beat it for the price.
Reviewed in the United States on December 4, 2025 by Alexander
Size: 4.0 Inch
It came bent on one end
Reviewed in the United States on November 25, 2025 by Bo
Size: 3.5 Inch
BIGREAT 409 Steel 3.5" OD Straight Exhaust Pipe Mandrel Tubing – Review Overview: The BIGREAT 3.5-inch OD straight exhaust pipe is made from 409 stainless steel and measures 48 inches (4 feet) in length. It’s designed for custom exhaust system projects, providing a durable and versatile option for DIY enthusiasts and professionals alike. Pros: Material Quality: 409 stainless steel is corrosion-resistant and handles high exhaust temperatures, offering a good balance of durability and cost. Versatile Fitment: Can be used in a wide range of custom exhaust applications for cars, trucks, or performance upgrades. Adequate Length: 48 inches provides flexibility for cutting or fitting in various exhaust configurations. Cons: Corrosion Resistance: While 409 stainless is decent, it is not as resistant as higher-grade T304 stainless steel; over time, especially in harsh or salty environments, oxidation may occur. Finish: Raw steel finish may require polishing, coating, or ceramic treatment if long-term aesthetics or maximum corrosion resistance are desired. Limited Diameter Options: Only 3.5-inch OD; may not fit vehicles requiring other diameters without additional adapters or reducers. Usage Tips: Use proper clamps or welds to secure in your exhaust system. Consider coating or polishing for outdoor or high-humidity environments. Measure carefully before cutting to ensure correct fit for bends and alignment in your custom setup. Bottom Line: This BIGREAT 409 steel pipe is a solid, cost-effective option for custom exhaust systems, providing good durability and smooth flow. Ideal for DIY or professional builds where 3.5-inch OD tubing is required, though users in high-corrosion environments may want to consider higher-grade stainless steel for longevity. Although 304 stainless looks great, 409 stainless may be a better choice for anything that is going to last through hundreds (or thousands) of heat cycles without the welds becoming brittle and potentially failing.
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Reviewed in the United States on September 21, 2025 by Fred Bloggs
Size: 3.5 Inch
This is a great piece to build an exhaust. I had to look up how 409 differs from 300 series SS - it turns out to be great for exhaust. All the specs are as advertised & the pipe is finished nicely, clean cuts, no burs, etc. This is a great deal in all the sizes they offer. easy recommendation
Reviewed in the United States on September 16, 2025 by damon damon