PRODUCT DETAILS
PRL Motorsports N1 Single Exit Exhaust (HC11-EX-N1) - 2022+ Civic & 2023+ Integra
Honda built the 11th gen to be quiet, which suits the commute and undersells the car. This N1 system is 3" mandrel bent 304 stainless with a single exit, one resonator and one muffler, tuned to sound aggressive without the highway drone that makes most aftermarket exhausts wear out their welcome. No ECU calibration required.
Drone Is Why People Regret Exhausts
Worth explaining, because it's the thing that determines whether you still like this in a year.
Drone is a resonance problem. At certain engine speeds, usually right where you sit on the highway, exhaust pulses reinforce each other and produce a low frequency boom inside the cabin. It's not loudness exactly, it's a pressure you feel in your ears and your chest, and it gets exhausting on a long drive.
Plenty of exhausts sound great in a parking lot and become unbearable at 70mph. That's why people buy a system, love it for a month, and then start looking at resonators.
PRL calculated tubing length, bend placement, and component positioning specifically to avoid that resonance, and they run both a resonator and a muffler rather than deleting one to save cost. The result is a system you can use on a road trip.
Single Exit Is A Deliberate Choice
Not a compromise, and worth understanding why.
A single exit keeps weight down and cost down compared to a dual system, and on a four cylinder it's the more efficient arrangement anyway. You're not splitting flow between two paths that each end up smaller than the single one they replaced.
Straight 3" through the whole system means less backpressure and better flow than the factory setup, without the added weight hanging off the back of the car.
The Details That Affect Longevity
Three decisions PRL made that you'll appreciate later.
Slip-fit connections. Aside from the 3-bolt front pipe flange, everything slips together. That means you can adjust tip position and alignment during install rather than living with wherever a welded system happens to land.
Clamped hanger rather than welded. The muffler hangs from a clamp assembly instead of a welded-on tab. Welded hangers are a stress point that eventually cracks, and when one does you're replacing or repairing a muffler. A clamp is adjustable, serviceable, and doesn't introduce that failure point.
Back-purged TIG welds. Back purging floods the inside of the joint with inert gas while welding so the weld doesn't oxidize on the back side. It's an extra step a lot of manufacturers skip, and it's the difference between a weld that stays sound and one that becomes a corrosion point from the inside out.
Some Cars Need The Bumper Cutout Deleted
Check this before install day.
Depending on your trim and year, the driver side rear bumper may have an exhaust cutout that needs deleting for this system to sit correctly.
Not every car requires it, but worth confirming what your bumper looks like against the product photos so you know what you're dealing with before the old exhaust comes off.
Pair It With A Front Pipe
Where this system really opens up.
A cat-back is the last section of the exhaust. Everything ahead of it still flows the way Honda designed, which means the factory front pipe becomes the restriction once you've freed up what's behind it.
Adding a 3" front pipe gives you a consistent 3" path from the turbo back, and that's where the meaningful flow gains are. We stock several options at different price points, so it's worth seeing what suits your build before you commit.
The N1 works well on its own. It works considerably better as part of the full path.
No Tune Required
Exhaust changes what leaves the engine rather than how fuel is metered going in, so the factory calibration remains correct. Fit it and drive.
What's In The Kit
- 3.00" mandrel bent 304 stainless tubing, 16 gauge (.065")
- (1) Stainless steel N1-style muffler
- (1) Stainless steel resonator
- (1) Muffler clamp hanger assembly
- Premium hardware and gasket
Fitment
2022-2026 Honda Civic 1.5T and 2.0L
2023-2026 Acura Integra 1.5T
All non-Type R trims including LX, Sport, EX, and Si, plus Integra Base and A-Spec. Covers CVT, six-speed manual, right-hand drive, and international variants. Part number HC11-EX-N1.
Some models may require driver side rear bumper exhaust cutout delete.
Who Should Run This Exhaust
This is for the owner who wants the car to sound like something without dreading the highway. Full 3" stainless, a resonator and muffler both doing their jobs, and welds and hangers built to last rather than to hit a price. Pair it with a front pipe when you're ready, and enjoy an exhaust you still like next summer.
Fits: 2022-2026 Honda Civic 1.5T and 2.0L (non-Type R), 2023-2026 Acura Integra 1.5T. All variants including Si, CVT, 6MT, RHD, and international. Part number: HC11-EX-N1. Construction: 3.00" 16 gauge 304 stainless, mandrel bent, TIG welded and back purged. Includes: N1-style muffler, resonator, muffler clamp hanger assembly, hardware and gasket. Tuning: no ECU calibration required. Note: some models require driver side rear bumper exhaust cutout delete.
2023-2026 Acura Integra Base/ASpec
2022-2026 Honda Civic Si/Sport/EX/Sport Touring