Invidia 2015 - 2021 Subaru WRX FA20 Equal Length Manifold

HS15SW4HDEL

The Invidia FA20 Equal Length Manifold (part number HS15SW4HDEL) is a high-performance exhaust component designed specifically for the Subaru WRX and other vehicles equipped with the FA20 engine. Unlike the unequal length manifolds, this part features an equal length design, which offers a different set of performance advantages and a distinct sound profile.

Key Features:

1. Equal Length Design: The most defining feature of the HS15SW4HDEL manifold is its equal length configuration, where each exhaust runner has the same length. This design helps to balance the exhaust pulses, leading to smoother exhaust flow and reduced turbulence. The even length of the runners promotes a more consistent and efficient exhaust flow, which is particularly beneficial for maximizing power at higher RPMs and improving turbo spool time.

2. Stainless Steel Construction: Built from high-quality stainless steel, the HS15SW4HDEL manifold offers excellent durability and resistance to heat and corrosion. Stainless steel maintains its integrity in high-temperature environments, ensuring the manifold will perform well under demanding conditions. This material also offers longevity and reduces the likelihood of premature wear or failure, making it a long-lasting solution for your vehicle.

3. Optimized Exhaust Flow: The equal length design optimizes exhaust flow by minimizing the exhaust pulse interference seen in unequal length designs. The result is an engine that breathes more efficiently, with reduced backpressure and improved exhaust scavenging. This can lead to gains in horsepower and torque, particularly when paired with other performance components such as an upgraded turbocharger, intake system, or full exhaust.

4. Improved Turbo Response: By providing smoother exhaust flow and better exhaust pulse synchronization, the equal length manifold helps to improve turbo spool time and reduce turbo lag. This translates to quicker throttle response, more immediate power delivery, and a more engaging driving experience. For drivers looking to maximize engine responsiveness and reduce delay during acceleration, this manifold offers an excellent upgrade.

5. Aggressive Sound Profile: One of the key differences between an equal length manifold and an unequal length manifold is the exhaust note. The HS15SW4HDEL manifold produces a smoother, less "rumbling" sound compared to the unequal length designs. While still aggressive, the sound is more refined and less throaty, with a cleaner and sharper exhaust note. The equal length configuration produces a more consistent firing order, contributing to a smoother and more even sound.

6. Direct-Fit Installation: Designed for direct-fit installation, the HS15SW4HDEL manifold bolts directly to the turbocharger and exhaust system without the need for significant modifications. This makes it a relatively easy upgrade for those looking to enhance their vehicle’s performance with minimal hassle. The manifold is compatible with a variety of aftermarket components and fits seamlessly with other performance parts for the FA20 engine.

7. Heat Management: The design of the manifold includes features to help with heat management, keeping the exhaust gases at optimal temperatures for engine efficiency. The high-quality stainless steel construction aids in dissipating heat, which can help maintain consistent performance and extend the lifespan of surrounding components.

8. Aftermarket Compatibility: The HS15SW4HDEL is designed to be compatible with a range of aftermarket turbochargers, exhaust systems, and intake setups. This makes it an ideal choice for enthusiasts who are upgrading multiple parts of their engine and want a manifold that works seamlessly with their custom setup.