A'PEXI N1 Evo Extreme Catback 2024+ Acura Integra Type S (DE5)

Retail Price: $2,549.00 Our Price: $2,421
Vendor: APEXi SKU: 164-KH04


The N1 Evolution Extreme is based on the proven performance basics of the N1 muffler which emphasizes optimum exhaust efficiency utilizing a straight-thru layout design. Equipped with an internal hybrid silencer uniting power and free flowing characteristics with effective functional sound resonance. A newly adopted muffler tip completes the tail end of the exhaust that serves both purposes of function and form. Constructed with a light weight titanium material rolled and riveted onto a double pipe structure which acts as a diffuser enabling temperature reduction, meanwhile retaining a sporty heat gradiation appearance.

- High-level of quality using tig-welded SUS304 stainless steel uniting quiet performance with high-power performance gains
- Matched and manufactured for select chassis
- Patented Megaphone piping structure to produce excellent torque and throttle response throughout the powerband. This piping design allows for a swirling exhaust gas flow effect that has for years produced proven results.

Bolt-On Yes
Part Number
N1-X (W/OUT GT Frontpipe Kit) 164-KH04
N1-X + GT Frontpipe Kit
Web Exclusive ONLY
164-KH04 + 145-H003
Year 2024+
Make Acura
Model Integra Type S
Body Style 5-Door Hatchback
Engine K20C
Chassis DE5
Exhaust Type N1 Evolution Extreme Muffler (N1-X)
Piping Diameter 75mm piping to 75mm (valve side) and 61mm (non-valve side)
Tip Diameter 123mm. x 2
Pieces 3 Piece Catback Exhaust
2 Piece Bracket on Muffler
Exhaust Tip Style Titanium Round- Dual wall rolled, Angle cut (Riveted)
Piping Material SUS304 Stainless Steel
Muffler Material SUS304 Stainless Steel
Muffler Tip Material TP270 Titanium
Weight Data

164-KH04 (N1-X): 43.70 lbs (Stock: 47.51 lbs)
145-H004 (GT Frontpipe): 7.38 lbs (Stock: 10.14 lbs)
Notes ***Optional Frontpipe Sold Separately (Part No. 145-H003)

Before completing the installation of the exhaust system with the factory OEM Valve Motor System, follow these steps:

  1. Uninstall the OE Valve Motor: Remove the OE Valve motor from the factory exhaust and disconnect it from the harness connected to the vehicle.

  2. Reset the Valve Motor: Prior to mounting the valve motor on the A'PEXi N1-X Exhaust System, ensure to plug the Valve Motor separately to initiate a factory reset position. This process typically takes around 5-10 seconds to automatically rewind to the reset position. Notably, this reset can be performed without the car being turned on.

  3. Reinstall the Valve Motor: Once the Valve Motor has completed its self-reset, remount it onto the bracket and proceed to install both the Valve Motor and the bracket onto the N1-X exhaust system.

Following these steps ensures proper installation and functionality of the exhaust system with the Valve Motor System.

WARNING: California Prop 65
Cancer & Reproductive Harm