APEXI N1 Evo Extreme Valved Quad Exit Catback Exhaust System (Resonated & Nonresonated) - 2023+ Toyota GR Corolla

Built on the proven N1 straight-through architecture, the A’PEXi N1 Evolution Extreme Catback maximizes exhaust efficiency while integrating an internal hybrid silencer for a refined, functional sound. Newly engineered quad tips feature a rolled, riveted double-pipe structure that acts as a diffuser to help reduce tip surface temperatures while preserving a purposeful, motorsport aesthetic. Made in Japan.

Key Features

• Straight-Through Performance: N1 layout prioritizes flow and response for the G16E-GTS.
• Hybrid Silencer: Balances free-flowing characteristics with tuned resonance for streetable volume.
• Patented Megaphone Piping: Promotes a swirling exhaust flow to enhance torque and throttle response across the powerband.
• Premium Materials: TIG-welded SUS304 stainless steel construction; tip options in titanium or stainless steel.
• Valved System: Integrated valve is compatible with the factory OE electronic module for seamless control.
• Made in Japan: Precision manufacturing and chassis-specific fitment.

N1-X Evolution Extreme Catback Exhaust- 2023+ Toyota GR Corolla

Why We Like It

This system delivers classic N1 urgency with modern civility. The electronically compatible valve and hybrid silencer keep daily driving composed, while the megaphone sections and quad diffuser-style tips unlock the GR Corolla’s character under load.

Specifications

• Exhaust Type: N1 Evolution Extreme (N1-X) Valved Quad-Type Catback
• Piping Diameter (Outer Left/Right): 70 mm → 60.5 mm × 2 pipes
• Piping Diameter (Center Dual): 70 mm → 50.8 mm × 2 pipes
• Tip Diameter: Center dual tips 93 mm; outer tips 123 mm
• Pieces: 2
• Exhaust Tip Style: Dual-wall rolled, angle cut (riveted)
• Tip Material Options: TP270 grade titanium (heat-treated gradient) or SUS304 stainless steel (polished)
• Piping/Muffler Material: SUS304 stainless steel
• Bolt-On: Yes

Speed Industries GR Corolla N1 EVO Exhaust Overview + Install

Installation Notes

• Direct bolt-on; designed to integrate with the factory OE electronic valve module.
• Reuses OEM hangers; no cutting or welding required.
• Verify tip alignment and valve connector routing before final torque.
• Professional installation recommended for best sealing and fitment.

What’s in the Box

• A’PEXi N1 Evo Extreme valved catback assembly (2 pieces)
• Quad tip set (titanium or stainless steel, per selection)
• Gaskets, hardware, and basic instructions

Compatibility & Disclaimers

For G16E-GTS turbocharged GR Corolla models. In some regions, exhaust modifications may be restricted for on-road use. Check local noise and emissions regulations prior to installation.