APEXI N1 EVOLUTION EXTREME CAT BACK EXHAUSTSYSTEM FOR TOYOTA GR COROLLA 4BA-GZEA14 G16E-GTS 167-T008J

 

APEXI N1 EVOLUTION EXTREME CAT BACK EXHAUSTSYSTEM FOR TOYOTA GR COROLLA 4BA-GZEA14 G16E-GTS 167-T008J

👍 Key Advantages

1. Premium materials & build quality
   
• The system is constructed using SUS304 stainless steel (tig-welded) which gives very good durability, corrosion resistance and heat endurance.  
• The tail tips are of lightweight titanium (in some variants) rolled & riveted onto a double pipe structure that acts as a diffuser for heat reduction.  
• Made in Japan, which for many JDM performance nuts adds confidence in the fitment, manufacturing and finish.  
• Fitment is chassis-specific (for select models) so you get a proper “bolt-on” feel. For your GR Corolla example: part 167-T008J, piping diameter etc specified.  
2. Performance oriented flow design
   
• The layout uses a straight-through muffler design, which helps reduce back-pressure and improves the efficiency of the exhaust gas evacuation.  
• It features a patented “megaphone piping” structure, which is claimed to produce better torque and throttle response across the powerband by encouraging a swirling exhaust-gas flow effect.  
• Larger piping diameters: For the GR Corolla version, piping is ~70 mm → 60.5 mm for outer, 70 mm → 50.8 mm for centre dual. This compared to stock will likely improve flow and reduce restriction.  
3. Sound tuning & tone
   
• According to the specification sheets, this exhaust aims to deliver “free-flowing characteristics with effective functional sound resonance” rather than being extremely loud or raspy.  
• From user reports: The build quality and sound are praised.
• For a car like the GR Corolla (which you likely appreciate for agility and everyday usability), having an exhaust that improves tone without excessive drone or annoyance is a good match.
4. Weight reduction
   
• One spec sheet for the GR Corolla variant lists weight: ~9.62 kg (21 lbs) compared to OE 14.56 kg (32.1 lbs). That’s a meaningful reduction (-5 kg) which helps unsprung / rear mass and contributes to better agility.  
• Especially for a car where cornering and responsiveness count (which you like), lighter rear/exhaust mass adds marginal gains.
5. Fitment & style
   
• The quad-tip layout (two centre dual tips 93 mm, two outer 123 mm for some variants) gives a distinctive aggressive appearance.  
• The titanium/heat-gradient tips add show-quality finish, which is good for blogging and for a performance build where aesthetics matter.

🔍 Considerations (and what to check)

Since you’re into performance cars and prepping for high-performance builds, you’ll want to keep in mind:

• Compatibility / Fitment: Ensure it’s the exact part number for your chassis/engine. For the GR Corolla, the listing shows 2023+ GR Corolla with G16E-GTS engine.  
• Tuning / Supporting modifications: While the exhaust improves flow, meaningful performance gains often come when combined with proper tuning and other mods (intake, down-pipe, mapping). On a naturally aspirated or turbocharged platform you’ll want to ensure the system isn’t the bottleneck.
• Sound / Drone: Even high-quality systems can still have some drone depending on vehicle/frequency/resonance. The user reports are positive but every car and driving environment differ.
• Legal / Emissions: Depending on Malaysia / local regulations, check whether the system is homologated (JASMA, etc) or whether replacement triggers any inspection issues.
• Cost / Value: This is a premium unit (as your blog audience will appreciate). Ensure budget aligns with performance/quality vs other options.
• Maintenance / Heat: Piping reduction and titanium tips help with temperature but always worthwhile to check heat shielding, exhaust hangers, clearance especially when you lower the car (which you may if you’re building for agility).

APEXI N1 EVOLUTION EXTREME CAT BACK EXHAUSTSYSTEM FOR TOYOTA GR COROLLA 4BA-GZEA14 G16E-GTS 167-T008J