不等長サウンド→等長サウンドへ【BMW F82 M4】

Summary

The video shows a conversation about modifying the exhaust of a BMW M4 sports car to improve the sound. They discuss the stock exhaust components and aftermarket parts like a new midpipe and V-band adapters. The owner wants to eliminate the unpleasant 'throaty' stock sound. They remove the stock midpipe and weld on a new one with V-bands. After installing the new exhaust, the owner is very pleased with the new aggressive sound, saying it no longer has the unpleasant 'throaty' tone.

Takeaways

• 🚗 The script discusses a BMW model, specifically the F82 M4, focusing on its exhaust system and modifications.
• 📢 Original exhaust parts are mentioned to be completely stock, with discussions on making the exhaust louder.
• 🏆 A racing component from "Tebis Racing" is mentioned, indicating a modification or aftermarket part installed on the vehicle.
• 🔨 The conversation includes technical details about the car's catalytic converter setup and how changing lengths in the exhaust system affects the sound, creating a "droning" noise.
• 🛠 Discussion on the direct-six (straight-six) engine configuration and how it's connected to the exhaust setup.
• 💵 Pricing for the aftermarket components is mentioned, suggesting affordability with costs around 100,000 yen for some parts, contrasting with more expensive upgrades for high-end vehicles.
• 💻 The importance of high-quality materials like stainless steel in the exhaust system is highlighted, alongside the advantages of lightweight piping.
• 🔧 The script touches on the technical process of modifying the exhaust system, including replacing parts and welding, to achieve a desired sound and performance.
• 👨‍🔧 Personal experiences and preferences in car modifications are shared, emphasizing the complexity and challenges in modifying high-end cars like BMWs.
• 💥 Final results of the modifications are discussed, with a noticeable improvement in exhaust sound and performance, leading to satisfaction with the project outcome.

Q & A

What car model is being discussed in the video?

A BMW M4 F82.

What modifications are being done to the car?

The stock exhaust system is being replaced with a custom titanium exhaust system with V-band connections.

Why are modifications being made to the exhaust system?

To change the exhaust tone and eliminate the unwanted 'dro dro' resonance sound in the mid-rpm range.

What is the stock exhaust system configuration on the BMW M4?

It has a 6-cylinder twin-turbo engine, with 2 exhaust pipes from each bank joining into one system.

What is the purpose of the V-bands being installed?

The V-bands allow the system to be easily disconnected for future modifications or maintenance.

How does the new exhaust system change the sound?

It eliminates the 'dro dro' resonance and makes the tone sharper and louder in the mid-rpm range under acceleration.

What special equipment is required for the exhaust work?

An automotive lift, welding equipment, specialty exhaust fabrication tools, clamps and hangers.

How long does the exhaust system modification take?

The complete job takes 2-3 hours with multiple technicians working.

What precautions are taken when modifying the exhaust?

The exhaust components are allowed to cool before removal, and the car is raised safely on lifts.

What is the customer's reaction to the new exhaust sound?

The customer is very pleased with the changed exhaust tone and lack of unwanted resonance.