Choosing exhaust tubing for a car repair is more involved than matching a nominal size. Inner diameter, outer diameter, length, flexibility, connection style, and intended use all affect whether a tube fits your system.
This guide compares nine exhaust tubes and flex pipes for automotive repairs, custom exhaust work, generator extensions, and related applications. Because several listings use sizes other than 1.5 inches, confirm the dimensions and intended use before ordering.
The PAZLAM 1.5-inch flexible stainless steel tubing is the strongest all-around match for 1.5-inch repair work because it offers a 27.6-inch length, shape-holding flexibility, clamps, a connector, and sealing tape. For longer custom projects, the 72-inch T304 option offers cut-to-fit flexibility, while the $12.99 diesel-heater tube is the entry-level choice for its stated application.
Quick Product Comparison
| Product | Image | Best For | Check Price |
|---|---|---|---|
| 1. PAZLAM Flexible Exhaust Tubing |  | Short flexible extensions | Check Price |
| 2. Short Universal Flex Pipe | | Compact connections | Check Price |
| 3. Six-Foot Universal Flex Pipe | | Long routing runs | Check Price |
| 4. 1.25-Inch Six-Foot Flex Pipe | | Longer 1.25-inch repairs | Check Price |
| 5. T304 1.5-Inch Flex Tubing | | Custom cut-to-fit systems | Check Price |
| 6. T304 Straight Extension Tube | | Straight 18-inch extensions | Check Price |
| 7. 304 Stainless Flex Pipe | | Flexible 1.5-inch repairs | Check Price |
| 8. T304 Straight Tubing | | Flared straight connections | Check Price |
| 9. Diesel Heater Exhaust Pipe | | Air diesel-heater systems | Check Price |
What to Look for in Best 1 1 2 Exhaust Tubing
Inner and outer diameter
Match the tube’s inner diameter to the connection it must accept, then check outer diameter where clamps, sleeves, or other tubing will fit. The listings include 1.5-inch ID options, but several alternatives are 1 inch, 1.25 inches, or 2 inches.
Length and routing flexibility
A short 27.6-inch tube suits an extension, while a 72-inch tube provides more material for longer runs or custom cutting. Flexible tubing can help route around confined areas, but it still needs appropriate support and clearance.
Material and construction
Several choices use 304 or T304 stainless steel, with features describing resistance to rust, corrosion, moisture, or demanding exhaust conditions. Multi-layer and spiral constructions are intended to accommodate vibration and alignment differences.
Connection method
Some products include U-bolt clamps, while others identify welding, clamping, sliding-fit, or flared-end connections. Confirm that the connection style matches the existing exhaust components and your installation plan.
Application limits
Automotive exhaust, generator extensions, industrial equipment, and diesel-heater piping are not automatically interchangeable. The product’s stated use matters as much as the diameter.
- Measure the existing pipe’s inside and outside diameters before ordering, and compare both measurements with the listing.
- Plan the route before cutting a long tube so enough material remains for the connection.
- For another 1.5-inch automotive component, compare the fitment requirements in this guide to the options in our 1.5-inch fuel filler hose roundup.
Our Top 9 Best 1 1 2 Exhaust Tubing Picks and Reviews
1.5-Inch ID Flexible Stainless Steel Exhaust Tubing, 27.6-Inch Length for Universal Automotive Exhaust Repairs
This PAZLAM tube is a direct size match for shoppers seeking 1.5-inch ID flexible exhaust tubing. Its 27.6-inch length and included installation pieces make it suited to shorter extensions and repairs.
Key Features That Stand Out
- Laser-welded stainless steel construction is described as improving strength, heat resistance, and durability.
- Measures 1.5 inches inside diameter and 27.6 inches long.
- Bends to fit tight spaces and holds its shape after installation; it is not stretchable or compressible.
- Package includes two stainless steel clamps, a straight connector, and high-temperature sealing tape.
Why It Stands Out
It combines the target 1.5-inch ID with a manageable length and more included hardware than several other listings. The product is explicitly described as an extension rather than a direct generator exhaust connection.
Best For
Pros and Cons
- Target 1.5-inch ID
- Shape-holding flexible design
- Includes clamps, connector, and sealing tape
- Shorter than the 72-inch alternatives
- Not intended for direct generator exhaust connection
1-Inch x 16.5-Inch Universal Stainless Steel Exhaust Flex Pipe with Two U-Bolt Clamps, Rust-Resistant
This short universal flex pipe is positioned as a compact connection piece. The listing title and feature text show different diameter information, so shoppers should verify the current dimensions before purchase.
Key Features That Stand Out
- Genuine stainless steel is described as resistant to corrosion and rust.
- Feature text states 1.25-inch ID by 16.5 inches long, while the title states 1 inch.
- Multi-layer, single-roll-band construction is intended to absorb vibration and compensate for misalignment.
- Includes two heavy-duty U-bolt clamps and burr-free ends for clamp or weld installation.
Why It Stands Out
Its compact length and included clamps may suit a short repair, but the conflicting size information is a significant fitment checkpoint.
Best For
Pros and Cons
- Compact 16.5-inch length
- Includes two U-bolt clamps
- Flexible design addresses vibration and misalignment
- Not a 1.5-inch option
- Title and feature dimensions conflict
1-Inch x 72-Inch Universal Stainless Steel Exhaust Flex Pipe with Two U-Bolt Clamps, Rust-Resistant
This six-foot flex pipe provides substantially more length than the short options and includes two U-bolt clamps. Its stated 1-inch ID makes it an adjacent-size option rather than a direct 1.5-inch match.
Key Features That Stand Out
- Measures 1 inch inside diameter and 72 inches long.
- Stainless steel construction is described as rust and corrosion resistant.
- Multi-layer, single-roll-band construction is intended to absorb vibration.
- Burr-free ends support clamp or weld installation, according to the listing.
Why It Stands Out
The supplied price is lower than the other six-foot flexible options, while the long length offers routing and cut-to-fit potential. Confirm whether the 1-inch size suits the vehicle before purchase.
Best For
Pros and Cons
- Six-foot length
- Includes two clamps
- Listed at an entry-level price
- 1-inch ID is not a 1.5-inch match
- Supplied rating is 3.3 from four reviews
1.25-Inch x 72-Inch Universal Stainless Steel Exhaust Flex Pipe with Two U-Bolt Clamps, Rust-Resistant
This option provides a six-foot flexible section for systems using the listed 1.25-inch size. It includes two clamps and describes compatibility with several exhaust components.
Key Features That Stand Out
- Measures 1.25 inches inside diameter and 72 inches long.
- Stainless steel construction is described as resistant to rust and corrosion.
- Multi-layer, single-roll-band construction is intended to absorb vibration and accommodate misalignment.
- Includes two U-bolt clamps and burr-free ends.
Why It Stands Out
Compared with the shorter alternatives, its six-foot length gives more flexibility for longer repairs. It should not be selected for a 1.5-inch connection without an appropriate transition and confirmed fitment.
Best For
Pros and Cons
- Long six-foot format
- Includes two clamps
- Flexible construction addresses vibration
- Not a 1.5-inch ID product
- Supplied rating is 3.6 from four reviews
1.5-Inch ID x 72-Inch T304 Stainless Steel Flexible Exhaust Tubing for Automotive Repairs and Custom Systems
This is one of the closest matches to the focus size for longer repairs and custom fabrication. The six-foot tubing can be cut to the required length, and the listing identifies both ID and OD measurements.
Key Features That Stand Out
- Measures 1.5-inch ID, 1.65-inch OD, and 72 inches long.
- Uses T304 stainless steel, described as resistant to rust, corrosion, and moisture.
- Flexible spiral construction helps route around confined spaces and accommodate movement.
- Six-foot tubing can be cut to fit and used with welding or other compatible connections.
Why It Stands Out
The combination of the target ID, long length, stated OD, and cut-to-fit design makes it adaptable for custom automotive exhaust work. Professional installation is recommended by the listing.
Best For
Pros and Cons
- 1.5-inch ID
- Six-foot cut-to-fit length
- T304 stainless steel construction
- May require welding or compatible connection hardware
- Professional installation is recommended
2-Inch ID T304 Stainless Steel Straight Exhaust Extension Tube, 18-Inch Tailpipe Connector for Universal Installation
This straight tube is a different type of product from the flexible 1.5-inch options. It is an 18-inch extension with a stated 2-inch outer diameter and is intended for compatible exhaust or industrial uses.
Key Features That Stand Out
- Made from T304 stainless steel with described corrosion and oxidation resistance.
- Measures 2 inches in outer diameter and 18 inches long.
- Straight, polished pipe body is positioned for DIY projects.
- Package includes one straight pipe.
Why It Stands Out
Its simple straight format may suit a direct extension where the 2-inch outer diameter is correct. It is not a direct substitute for 1.5-inch ID flexible tubing.
Best For
Pros and Cons
- T304 stainless steel
- Simple 18-inch straight design
- Polished body for DIY projects
- 2-inch outer diameter does not match the focus size directly
- No clamps or connector are listed as included
1.5-Inch ID 304 Stainless Steel Exhaust Flex Pipe, 72-Inch Universal Flexible Tubing for Repairs
This 72-inch 304 stainless steel flex pipe is another direct 1.5-inch ID option. Its single-roll-band and multi-layer design is intended to help manage vibration and alignment differences.
Key Features That Stand Out
- Uses 304 stainless steel for described corrosion resistance.
- Provides a 1.5-inch ID and 72-inch length.
- Single-roll-band, multi-layer construction is intended to support leak-resistant performance.
- Pre-cut length and burr-free ends support weld or clamp installation.
- The listing states 18-month technical assistance.
Why It Stands Out
It offers the target ID in a long format and includes construction details aimed at vibration management. The listing does not identify clamps in the package, so connection hardware may need separate confirmation.
Best For
Pros and Cons
- Direct 1.5-inch ID match
- Six-foot length
- 304 stainless steel and vibration-focused construction
- Installation hardware is not clearly listed
- Long length may require cutting or careful routing
1.5-Inch OD to 1.5-Inch ID T304 Stainless Steel Straight Exhaust Tubing for Custom Repairs
This straight T304 tube is designed around a flared connection rather than flexible routing. The listing describes a polished surface and sliding-fit design for compatible 1.5-inch straight-pipe applications.
Key Features That Stand Out
- Non-magnetic T304 stainless steel with a polished surface.
- Features a precision flared end and quad-slot flared-end design.
- Designed as a universal adapter for 1.5-inch straight-pipe exhaust tubing.
- The listing identifies uses including exhaust, intake, cooling, turbo intercooler piping, and motorcycle exhaust applications.
Why It Stands Out
The flared end may help shoppers whose repair requires a sliding-fit or expanded connection. It is straight tubing, so it does not provide the routing flexibility of the flex-pipe choices.
Best For
Pros and Cons
- T304 stainless steel
- Flared end for a compatible sliding fit
- Listed for several tubing and piping applications
- Not flexible tubing
- No installation instructions are listed
59-Inch Diesel Heater Exhaust Pipe, 1-Inch ID Stainless Steel Flexible Tubing with Two Hose Clamps
This low-cost flexible tube is designed specifically for air diesel-heater systems rather than general 1.5-inch automotive exhaust repairs. It includes two hose clamps and is offered in 59-inch and 47.2-inch lengths.
Key Features That Stand Out
- Has a 1-inch inside diameter and a listed 59-inch length.
- Made from stainless steel and described as flexible and corrosion resistant.
- Package includes one tube and two matching hose clamps.
- Designed for vehicles equipped with air diesel heaters, including cars, trucks, SUVs, RVs, and vans.
Why It Stands Out
Its supplied price and included clamps make it an accessible replacement for the stated diesel-heater application. The 1-inch ID means it should not be treated as a 1.5-inch exhaust substitute.
Best For
Pros and Cons
- Lowest supplied price
- Includes two clamps
- Long 59-inch option
- 1-inch ID is not a 1.5-inch match
- Intended specifically for air diesel heaters
Exhaust components become extremely hot and may carry harmful gases. Work only on a fully cooled system in a properly ventilated area, follow vehicle and product instructions, and verify that the finished routing has appropriate clearance and secure connections. Correct tubing alone cannot guarantee a successful repair or inspection result.
Complete Buying Guide for Best 1 1 2 Exhaust Tubing
Price and value
The supplied listings range from a low-cost diesel-heater pipe at $12.99 to flexible and straight automotive tubing priced above it. Price should be weighed against size accuracy, length, material, included clamps, and the connection method required.
Entry-level options suit shorter or application-specific repairs and may include basic clamps, but verify diameter and intended use carefully.
Mid-range flexible tubing suits shoppers needing stainless construction, longer lengths, vibration accommodation, or more adaptable exhaust routing.
Premium choices are best for custom work requiring a target 1.5-inch ID, T304 material, cut-to-fit length, or specialized connections.
Compatibility and intended use
Start with the vehicle or equipment application. Products in this roundup cover automotive exhaust repairs, generators, industrial equipment, and diesel heaters. A tube that physically fits may still be unsuitable for the system’s intended temperature, routing, or connection requirements.
Check the existing system’s ID and OD, available length, bends, clamps, and nearby clearance. If you are also replacing a nearby rubber component, compare the dimensions with our guide to the best 1.5-inch bushings, but do not assume a bushing and exhaust tube are interchangeable.
Dos and Don’ts
- Measure the existing connection before selecting a tube.
- Confirm whether the listed size is ID or OD.
- Choose flexible tubing when routing and vibration accommodation are required.
- Follow the manufacturer’s recommended clamp, weld, or sliding-fit method.
- Do not assume every “universal” tube fits a 1.5-inch system.
- Do not ignore conflicting dimensions in a product title and feature list.
- Do not use diesel-heater tubing as a general automotive exhaust replacement without confirming suitability.
- Do not work around hot exhaust parts or run an engine in an enclosed area.
Installation and maintenance tips
- Lay out a long tube before cutting so the final length supports the planned connection.
- Inspect clamps, connectors, and seals for secure fitment after installation according to the product instructions.
- Recheck for movement, contact with nearby components, or obvious leakage after the system has cooled.
- For fastening work around the exhaust, use the correct tool size; our 1 1/16-inch socket guide may help with a separate socket-size search.
Before ordering, write down the old tube’s ID, OD, usable length, connection style, and application. Then compare each measurement with the current product page.
Quick Recap
- PAZLAM flexible tubing: Best overall for a short 1.5-inch extension with included hardware.
- Short universal flex pipe: Compact alternative, but verify its conflicting diameter information.
- Six-foot 1-inch flex pipe: Best value for compatible longer 1-inch runs.
- Six-foot 1.25-inch flex pipe: Longer option for systems using the stated 1.25-inch size.
- T304 1.5-inch flex tubing: Strong choice for long, cut-to-fit custom repairs.
- T304 straight extension: Straight 18-inch tube for compatible 2-inch applications.
- 304 1.5-inch flex pipe: Long direct-size option with vibration-focused construction.
- T304 straight tubing: Flared straight-pipe choice for compatible custom connections.
- Diesel-heater pipe: Low-cost replacement for compatible air diesel-heater systems.
- Always verify ID, OD, length, and connection method before buying.
- Use the tubing only for an application supported by the product documentation.
Frequently Asked Questions About Best 1 1 2 Exhaust Tubing
The PAZLAM flexible tubing is the strongest all-around match for short 1.5-inch extension work because it lists a 1.5-inch ID and includes clamps, a connector, and sealing tape.
No. The roundup includes adjacent-size products with 1-inch, 1.25-inch, and 2-inch measurements. They are included for comparison but require careful fitment verification.
It can provide more material for longer routing or custom cutting, but it is not automatically better. Choose based on the required length, diameter, route, and connection method.
Not automatically. The diesel-heater product here is listed for air diesel-heater systems and has a 1-inch ID, so confirm application and dimensions before considering it for another system.
Flexible tubing suits confined routing, vibration, and minor alignment differences. Straight tubing is more appropriate when the system requires a direct extension or flared straight connection.
Confirm ID, OD, length, application, connection style, and clearance from nearby components. Install only on a cooled system and follow the product and vehicle instructions.
The best 1 1 2 exhaust tubing depends on more than a product title. For a short, hardware-inclusive 1.5-inch extension, the PAZLAM option is the most balanced choice from the supplied information.
For longer custom work, the T304 and 304 stainless flex pipes offer useful 72-inch formats, while the straight and diesel-heater products are better suited to their narrower stated applications. Verify every dimension and connection before ordering.
This comparison used only the supplied product titles, feature bullets, prices, ratings, review counts, images, and affiliate links. Products were assessed for stated diameter, length, material, flexibility, connection hardware, intended application, and value context. No first-hand testing, installation, ownership, customer interviews, or independent performance measurements were available, and prices and availability can change.