HKS LEGAMAX Premium VBH WRX S4 (Main)

This is the HKS LEGAMAX Premium VBH cat-back exhaust system, specifically designed for the Subaru WRX S4. It replaces the factory exhaust from the catalytic converter back, aiming to improve exhaust flow and deliver a more satisfying sound. If you're looking to give your WRX S4 a more aggressive tone and potentially a bit more breathing room for the engine, this system is built for that purpose.

HKS has constructed this system using SUS304 stainless steel, which is known for its strength and resistance to corrosion, especially important for exhaust components that deal with heat and moisture. The piping diameter is 75mm, stepping up from the stock size to allow exhaust gases to exit more freely. The muffler design, referred to as VBH (Variable Baffle Heatsink), is a notable feature. It's engineered to manage sound frequencies, aiming for a sporty sound under acceleration while keeping things more subdued at cruising speeds, reducing drone. This approach helps balance performance with daily drivability.

When installing a cat-back system like this, you're typically looking at a bolt-on process, meaning no welding is required. It's designed to fit right onto the existing exhaust hangers. While this system is primarily about sound and flow, many enthusiasts find that an improved exhaust note is a significant part of the driving experience. This HKS system aims to provide that without being overly intrusive for everyday use.