Acura Exhaust Upgrade Guide: Pick the Right Tone and Fit

By REMARK Exhaust | Published: 2026-10-17

Category: Buying Guides

Decide between an Acura catback and axleback by matching tone, daily comfort, and fitment. Use the Integra DE4 specs to choose the right setup the first time.

Quick answer

For a 2023+ Acura Integra DE4 1.5T, the REMARK Sports Touring Catback Exhaust is the right first upgrade if you want a fuller tone without drone on daily drives. It replaces the factory rear section with a 3-inch resonated midpipe that bolts to the OEM front overpipe, then splits to dual 2.5-inch piping and dual oval mufflers with 4-inch slant-cut tips. If you only want a modest bump in sound and easier installation, start with an axleback instead.

How the Integra DE4 exhaust path changes

The factory Integra DE4 1.5T exhaust is a single-path system designed for quiet cruising. The Sports Touring Catback replaces the midpipe and rear sections while keeping the OEM front overpipe, so you are changing tone, tip look, and rear flow without cutting or welding. The 3-inch resonated midpipe feeds dual 2.5-inch pipes and dual oval mufflers. That split changes how the car sounds at part throttle and how it looks from behind, but it does not require a tune or ECU changes.

Catback vs axleback: which one fits your goal

A catback changes more of the exhaust path, so it has a larger effect on tone and volume. An axleback changes only the rear muffler section, so it is lighter on the wallet and easier to install, but it will not reshape the midrange sound the way a resonated midpipe can. If you want a deeper, more controlled note that stays livable on the highway, the catback is the better starting point. If you want a subtle change and you are keeping the factory midpipe, an axleback is the practical choice.

Tone rules for the 1.5T Integra

The 1.5T engine responds to exhaust changes differently than a V6 or a turbocharged V6. A straight-through design with a resonator keeps the tone clean and reduces boom at highway speed. The Sports Touring Catback uses a resonated midpipe and dual oval mufflers specifically to add character without making the cabin uncomfortable. If you remove the resonator or step up to a larger diameter without a matching tune, you often gain volume but lose refinement. For a daily-driven Integra, keep the resonator and let the mufflers shape the tone.

Fitment details that prevent surprises

The Sports Touring Catback is listed for the Acura Integra DE4 with the 1.5L turbocharged engine from 2023 onward. It bolts directly to the OEM front overpipe, so you do not need to modify the factory front section. The rear splits to dual 2.5-inch piping, which means the system uses dual mufflers and dual tips. Check your rear bumper clearance and whether your car has active exhaust valves or a factory valved muffler before ordering, because those features change what fits and what you need to disable or retain. If your Integra is a different generation or engine, this exact system is not the right match.

What to buy first if you are unsure

If you are new to exhaust upgrades, start with the catback and keep the factory front overpipe. That gives you the largest improvement in tone and appearance with the fewest variables. If you already have an aftermarket rear section and want to change the midrange sound, look at a midpipe kit instead. For the Integra DE4, the Sports Touring Catback is the complete package. For a Subaru WRX VB owner comparing options, the Midpipe Kit for Axleback System is a separate path that changes the center section only. Do not mix parts across platforms unless the manufacturer confirms the flange and diameter match.

Decision rules for your Acura exhaust upgrade

Daily driver, stock downpipe: Choose the Sports Touring Catback with the resonated midpipe and dual oval mufflers. It bolts to the OEM front overpipe and keeps the cabin comfortable at cruise. Best balance of tone, fit, and daily comfort for a 2023+ Integra DE4 1.5T.
Want a subtle change and lower cost: Choose an axleback instead of a catback. It changes the rear section only, installs faster, and costs less, but it will not reshape the midrange sound. Pick an axleback if you are keeping the factory midpipe and want a modest bump in note.
Already have an aftermarket rear section: Look at a midpipe kit to change the center section and resonator. On the WRX VB, the midpipe kit comes in three versions, including a 3-inch non-resonated and a 3-inch resonated option. Match the midpipe to your axleback diameter and your noise tolerance before buying.
Check fitment before you order: Confirm your model year, engine, and whether the car has active exhaust valves. The Integra DE4 catback is listed for 2023+ 1.5T models and bolts to the OEM front overpipe. If your car is a different generation or engine, this system is not a direct fit.

Product facts that matter

Sports Touring Catback Exhaust - Acura Integra DE4 [2023+]: 304 stainless steel catback with a 3-inch resonated midpipe that bolts to the OEM front overpipe, then splits to dual 2.5-inch piping, dual oval mufflers, and 4-inch slant-cut tips. The resonated midpipe and dual mufflers keep the tone controlled for daily driving while still giving the Integra a fuller note and a more aggressive rear look.
Midpipe Kit for Axleback System- Subaru WRX VB [2022+]: Midpipe kit for the 2022+ Subaru WRX VB available in three versions: 3-inch center section without resonator, 3-inch center section with a 400mm x 120mm straight-through high-flow resonator, or 2.5-inch center section with resonator, all splitting to dual 2.5-inch at the rear. The resonator choice directly controls sound suppression and drone, so you can match the midpipe to your axleback and your tolerance for highway noise.

Who this Acura exhaust upgrade is for

Best for

2023+ Acura Integra DE4 1.5T owners who want a fuller tone without highway drone
Daily drivers who want a bolt-on catback that keeps the OEM front overpipe
Buyers who want dual oval mufflers and 4-inch slant-cut tips for a cleaner rear look

Not for

Integra owners with a different engine or generation that is not listed for this system
Drivers who want the loudest possible setup and are willing to accept drone
Owners looking for a full turbo-back or downpipe replacement, which this catback does not include