GR86 Midpipe vs Stock: Sound and Performance Upgrade
By REMARK Exhaust | Published: 2026-10-29
Category: Comparisons
Comparing the stock midpipe with a high-flow upgrade for the GR86/BRZ. See how a midpipe affects sound, performance, and your daily driving experience.
Quick Answer
A high-flow midpipe is the most effective single upgrade for GR86 and BRZ owners who want more exhaust volume and a freer-flowing system without replacing the entire catback.
Why the Midpipe Matters
The midpipe is the section between the front pipe and the axleback. In the stock GR86 and BRZ, it's designed for quiet operation and emissions compliance, which often means a noticeable restriction. Swapping it for a high-flow version improves exhaust gas flow, which can reduce backpressure and help the engine breathe more freely.
For most drivers, the most noticeable change is sound. A high-flow midpipe typically adds volume and a deeper tone, especially when paired with an aftermarket axleback. It also opens up the exhaust note without the cost or complexity of a full catback system.
Stock vs. High-Flow: What's Different
The stock midpipe uses a restrictive design that prioritizes noise reduction. A high-flow midpipe replaces this with larger-diameter, mandrel-bent stainless steel piping and a straight-through resonator. The result is smoother exhaust flow and a more aggressive sound.
The trade-off is increased volume. If you prefer a quiet cabin or drive in noise-sensitive areas, the added sound may not be ideal. But for enthusiasts who want to hear their engine, it's a welcome change.
Midpipe vs. Stock: Trade-Offs to Consider
- Sound: A high-flow midpipe adds volume and a deeper tone, especially with an aftermarket axleback. Stock is quiet and reserved. If you want a louder exhaust, the midpipe is the key change.
- Performance: Improved flow can reduce backpressure and help the engine breathe, though gains are modest on a stock engine. Expect subtle performance improvement, not a dramatic power jump.
- Installation: The kit is a direct bolt-on replacement with no cutting or welding required, making it a straightforward DIY job. If you can install an axleback, you can handle a midpipe.
- Cost: A midpipe is significantly cheaper than a full catback system, making it a budget-friendly way to change sound and flow. It's a cost-effective first upgrade before investing in a catback.
- Noise Tolerance: Increased volume can be intrusive on long drives or in neighborhoods with strict noise rules. Consider your daily driving environment before committing.
Product Facts
- Midpipe Kit - GR86 / BRZ (2022+): This midpipe kit is a direct bolt-on replacement for the restrictive OE midpipe, featuring 2.5" OD mandrel-bent 304 stainless steel piping and a high-flow straight-through design resonator. The larger, smoother piping and straight-through resonator reduce exhaust restriction, which can improve flow and add a deeper, louder tone without needing a full catback system.
Midpipe Kit - GR86 / BRZ (2022+)
Who Should Choose a Midpipe Upgrade?
Best for
- GR86/BRZ owners who want a louder, more aggressive exhaust without the cost of a full catback
- Drivers planning to add a catback later and want to build their system step by step
Not for
- Drivers who prefer a quiet cabin or have strict noise restrictions
- Those seeking significant horsepower gains from a single bolt-on part
