Honda Civic / Acura Integra B16 B18 3-Inch Stainless Steel Turbo Downpipe
4-Bolt Turbo Flange | 304 Stainless Steel | CNC-Cut Flange | O2 Sensor Provision
High-Flow Honda B-Series Turbo Downpipe
Upgrade your custom Honda turbo exhaust system with the XS-POWER 3-inch stainless steel turbo downpipe, designed for performance-oriented Honda Civic and Acura Integra builds equipped with B16 or B18 engines and compatible 4-bolt turbocharger exhaust outlets.
Constructed from 304 stainless steel and featuring a precision CNC-cut mounting flange, this turbo downpipe is intended to provide a durable exhaust connection between the turbocharger outlet and the remainder of a custom performance exhaust system.
Whether you are building a Honda Civic B16 turbo setup, Acura Integra B18 turbo conversion, custom B-series GT35 turbo system, or modified Honda race application, this downpipe provides a foundation for a properly matched turbo exhaust installation.
This is a performance turbo conversion component, not a direct OEM replacement. Confirm the turbocharger's 4-bolt outlet flange, pipe routing, chassis clearance, and exhaust connection before ordering. Custom installation or fabrication may be required.
Performance Features & Benefits
Large-diameter piping intended for high-flow turbo exhaust applications where a compatible exhaust system is used.
Corrosion-resistant stainless steel construction for demanding performance exhaust environments.
Precision-cut mounting flange for installation with a matching 4-bolt turbocharger outlet.
Includes an O2 sensor mounting provision for compatible sensor arrangements.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | XS-POWER |
| Product Type | Turbocharger Exhaust Downpipe |
| Pipe Diameter | 3 inches (nominal) |
| Material | 304 Stainless Steel |
| Turbo Connection | 4-Bolt Mounting Flange |
| Flange Manufacturing | CNC-Cut |
| O2 Sensor | Sensor Mounting Provision Included |
| Engine Applications | Honda B16 / B18 Turbo Builds |
| Installation | Custom Turbo Conversion / Modified Fitment |
| Quantity | 1 Turbo Downpipe |
Honda Civic & Acura Integra Turbo Applications
This XS-POWER turbo downpipe is intended for custom turbocharged Honda B-series engine installations, including the following build categories when the turbo outlet and exhaust routing are compatible.
| Vehicle / Platform | Engine / Application | Fitment |
|---|---|---|
| Honda Civic | B16 Turbo / B-Series Swap | Custom Installation |
| Honda Civic | B18 Turbo Conversion | Custom Installation |
| Acura Integra | B18 Turbo Build | Custom Installation |
| Acura Integra | B16 / B-Series Turbo Conversion | Custom Installation |
Note: Vehicle and engine references describe potential custom turbo applications, not guaranteed bolt-on fitment. The downpipe must match the turbocharger outlet flange, installed turbo manifold orientation, and available chassis space.
Why Upgrade to a 3-Inch Turbo Downpipe?
The downpipe is an important part of a turbocharged engine's exhaust system. A properly designed and matched 3-inch turbo downpipe can help support exhaust flow downstream of the turbine and reduce unnecessary restrictions compared with an undersized exhaust connection.
For a modified Honda B16 or B18 engine, exhaust system sizing and routing should be selected according to turbocharger specifications, boost targets, engine configuration, and intended operating conditions.
Potential benefits of a properly matched system include:
- Support for higher-flow turbocharger exhaust configurations.
- Improved exhaust system compatibility for custom performance builds.
- Stainless steel durability and corrosion resistance.
- Integration into custom Honda B-series turbo exhaust fabrication.
- Compatibility with appropriately matched 4-bolt turbo outlet configurations.
Actual horsepower, spool response, and boost performance depend on the complete engine and turbocharger combination. No specific horsepower gain is guaranteed.
Turbocharger & Exhaust Compatibility
This downpipe is designed around a 4-bolt turbocharger outlet flange. Turbochargers marketed under GT35, T3/T4, and other performance designations can use different turbine outlet configurations, so the turbo model name alone does not establish compatibility.
Before ordering, compare the actual outlet flange bolt pattern, flange dimensions, downpipe orientation, and required exhaust connection. A compatible turbo manifold and adequate clearance are essential.
- Turbocharger outlet uses the matching 4-bolt flange pattern.
- Downpipe orientation matches the installed turbo position.
- Exhaust routing clears steering, suspension, firewall, and other components.
- O2 sensor position is compatible with the intended sensor arrangement.
- Existing exhaust system can be connected or modified as required.
Package Includes
1 x XS-POWER 3-Inch Stainless Steel Turbo Downpipe
Turbocharger, manifold, intercooler, additional piping, sensors, and installation hardware are not included unless specifically shown or stated in the product package.
Frequently Asked Questions
Will this fit my Honda Civic B16 turbo build?
It may be suitable for a custom B16 turbo setup with a compatible 4-bolt turbocharger outlet and appropriate downpipe routing. It is not guaranteed to fit every Civic chassis or turbo manifold arrangement.
Can I use this on an Acura Integra B18 turbo conversion?
Yes, it can be considered for a compatible custom B18 turbo installation. Confirm flange geometry, turbo placement, chassis clearance, and downstream exhaust routing before purchase.
Does this fit a GT35 turbocharger?
Only if the GT35-style turbocharger uses the matching 4-bolt turbine outlet configuration. Different GT35 turbocharger models may use different exhaust outlets.
Is this downpipe made from stainless steel?
Yes. The supplied product specification identifies 304 stainless steel construction and a CNC-cut mounting flange.
Does the downpipe include an oxygen sensor connection?
Yes. The downpipe includes an O2 sensor mounting provision. Confirm sensor thread size and position before installation.
Is this a direct replacement for my factory downpipe?
No. This is a custom turbo conversion component and should not be purchased as a factory downpipe replacement.
Will a 3-inch downpipe increase horsepower?
A properly matched exhaust system can help support turbocharger exhaust flow, but results vary by engine, turbocharger, tuning, and the rest of the exhaust system. No specific horsepower increase is guaranteed.
Is professional installation recommended?
Yes. Professional installation and custom exhaust fabrication experience are recommended, particularly for modified Honda Civic and Integra turbo conversions.
Installation & Use Notice
FOR OFF-ROAD / COMPETITION USE ONLY WHERE PERMITTED BY LAW. This product is intended for appropriate custom performance applications. It is not represented as emissions-certified or street-legal. Confirm all applicable emissions, safety, and vehicle equipment requirements before purchase or installation.
Installation may require fabrication, welding, exhaust modification, and additional components. Compatibility with third-party turbochargers, manifolds, and exhaust systems is not guaranteed.
XS-POWER HONDA TURBO PERFORMANCE PARTS
Building a turbocharged Honda Civic or Acura Integra? Explore compatible turbo manifolds, turbochargers, intercooler systems, exhaust components, and custom turbo piping from XS-POWER.
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Honda B16 Turbo Parts | Acura Integra B18 Turbo Components | Stainless Turbo Downpipes | Custom B-Series Turbo Exhaust Systems
