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AIRTEC Motorsport Inlet Manifold for Toyota Yaris GR / Corolla GR 201533

The AIRTEC Motorsport Inlet Manifold (ATMSYGR23) for the Toyota GR Yaris and GR Corolla is one of the more technically advanced intake manifold upgrades available for the turbocharged 1.6L G16E-GTS three-cylinder engine. 

It is designed specifically for modified cars running higher boost, upgraded turbochargers, or track-oriented setups. 

Key Engineering Advantages

1. 36% Higher Airflow Capacity

AIRTEC’s flow bench testing showed a 36% increase in airflow compared to the OEM plastic manifold. 

More airflow means the turbo works less hard to achieve a given power level and can support greater horsepower at higher RPM.  

Improved temperatures between cylinder  than peak horsepower.  It is a major reliability upgrade for further gains.  

Increased distribution and increased volume become much more meaningful.  It improves not only airflow but also cylinder balance and long-term engine reliability.

AIRTEC Motorsport Inlet Manifold for Toyota Yaris GR / Corolla GR 201533

Akrapovic Evolution Race Header Set (Titanium) - Porsche 911 GT3 RS (991.2) 2018 - 2020

 

Akrapovic Evolution Race Header Set (Titanium) - Porsche 911 GT3 RS (991.2) 2018 - 2020

The Akrapovič Evolution Race Header Set (Titanium) E-PO/T/5 for the Porsche 911 GT3 RS (991.2) is one of the most sought-after naturally aspirated Porsche exhaust upgrades available today.

Key Engineering Features

• Handcrafted Titanium Construction
• Much lighter than OEM stainless-steel manifolds.
• Reduces rear axle weight, improving turn-in response and agility.
• 100 CPSI Sports Catalytic Converters
• Considerably less restrictive than factory catalysts.
• Improves exhaust gas evacuation at high rpm.  
• Titanium Flanges
• Cast in Akrapovič’s own foundry.
• Greater thermal stability and corrosion resistance.  
• Designed for High-RPM Performance
• Power gains are concentrated from roughly 3,000 rpm all the way to the 9,000-rpm redline.
• Particularly suitable for the GT3 RS’s 4.0L naturally aspirated flat-six.  

Why Enthusiasts Love It

For the 991.2 GT3 RS, the factory engine already produces around 520 hp. The real attraction of the Akrapovič header system is not merely horsepower:

1. Sharper throttle response.
2. Faster engine breathing at high rpm.
3. Reduced back pressure.
4. More aggressive motorsport sound.
5. Noticeably improved downshift and overrun character.  

Many GT3 RS owners report that header upgrades contribute more to the “Cup-car” experience than rear muffler changes alone because they fundamentally alter the engine’s breathing characteristics.  

Technical Summary

Attribute	Akrapovic 2018 Porsche 911 GT3 Evolution Race Header Set
Material	Titanium
Catalysts	100 CPSI Sports Cats
Application	Porsche 911 GT3 RS (991.2) 2018-2020
Purpose	Track-focused performance
Weight Reduction	Significant vs OEM
Sound Character	Sharper, louder, more motorsport-oriented
ECU Tune Recommended	Yes
Road Legality	Depends on local regulations; many race-header setups are intended for track use only

Assessment

Among naturally aspirated Porsche exhaust upgrades, the Akrapovič Evolution Race Header Set ranks alongside the best available because it combines:

• Aerospace-grade titanium construction.
• Exceptional weld quality.
• Reduced rear-end weight.
• Improved top-end power delivery.
• A sound signature that more closely resembles a GT3 Cup race car.  

For a 991.2 GT3 RS owner seeking the maximum naturally aspirated experience without opening the engine, this is widely regarded as one of the ultimate exhaust upgrades available.

Akrapovic Evolution Race Header Set (Titanium) - Porsche 911 GT3 RS (991.2) 2018 - 2020

VR Performance Valvetronic Exhaust System Ferrari F458 (VR-F458-170)

 

The VR Performance Valvetronic Exhaust System Ferrari F458 (VR-F458-170) is a premium aftermarket exhaust. 

It was designed for the naturally aspirated 4.5L V8 in the Ferrari 458 Italia, Spider, and Speciale models (2010–2015). 

It focuses primarily on sound enhancement and driver-selectable exhaust character rather than outright power gains.  

Key Technical Features

VR Performance Valvetronic Exhaust System Ferrari F458 VR-F458-170

• Valvetronic operation with wireless remote control.
• Valves closed = quieter Sport/Touring mode.
• Valves open = unrestricted Race mode with maximum V8 sound.  
• T304 Stainless Steel construction
• Excellent corrosion resistance.
• Handles sustained exhaust temperatures.
• Lower cost than titanium while maintaining durability.  
• Robotic TIG welding
• Consistent weld penetration.
• Reduced risk of cracking compared to lower-quality exhausts.  
• Mirror-polished finish
• Suitable for the exposed rear-engine bay aesthetics of the 458.  
• Direct bolt-on installation
• Compatible with OEM exhaust tip configuration.
• Includes electronic valve controller and vacuum-actuated system.  

Why It Works So Well on the Ferrari 458

The Ferrari 458’s 4.5L flat-plane-crank V8 revs to approximately 9,000 rpm, producing one of the most celebrated naturally aspirated exhaust notes ever made. A valved exhaust allows you to enjoy:

• Civilized operation in urban environments.
• Full F1-style high-rpm scream on demand.
• Less cabin drone during cruising.
• More aggressive throttle-response sensation due to reduced backpressure when valves are open.  

Comparison with Premium Ferrari 458 Exhaust Brands

Feature	VR Performance	iPE	Capristo	Novitec
Material	T304 Stainless	Stainless / Titanium	Stainless	Stainless / Inconel
Valves	Yes	Yes	Yes	Yes
Weight Reduction	Moderate	High	Moderate	High
Sound Aggression	High	Very High	High	Very High
Cost	Lower	Higher	Higher	Highest
Daily Usability	Excellent	Very Good	Excellent	Very Good

Assessment

Sound Quality: 9.2/10
Build Quality: 8.8/10
Value for Money: 9.4/10
Weight Savings: 7.5/10
Exotic Character: 9.5/10

For a Ferrari 458 owner seeking the classic high-revving Ferrari soundtrack without spending Capristo, Novitec, or iPE money, the VR Performance valvetronic system is one of the stronger value propositions available. 

The biggest advantage is the ability to switch from civilized cruising to full race-car acoustics instantly.  

For maximum performance and exclusivity, however, titanium systems from iPE or Inconel-based systems from Novitec remain the benchmark, albeit at significantly higher cost.