Weapon-R Engine Intake Manifold

Weapon-R Sheet Metal Intake Manifolds: Race-Bred Induction for Sport Compacts

Weapon-R has built its reputation since 1993 as one of the most focused performance induction brands in the import tuner world. While the company covers a wide spectrum of bolt-on upgrades, their engine intake manifolds represent one of the most technically involved products in their lineup — purpose-built pieces designed for enthusiasts who want genuine power gains from their sport-compact engines.

What Sets Weapon-R Intake Manifolds Apart

Weapon-R's intake manifolds fall under their Sheet Metal Intake Manifold line — a premium tier of hand-fabricated induction components constructed from high-grade aluminum. Unlike cast OEM manifolds or simple plastic replacements, these units are engineered from the ground up with performance in mind.

• AL6061 Billet Aluminum Construction: Weapon-R's manifolds are built from high-grade AL6061 billet aluminum, offering exceptional strength-to-weight ratio and superior heat resistance compared to stock plastic manifolds.
• CNC-Machined Velocity Stacks & Flanges: Each unit features CNC velocity stacks and CNC-machined flanges, ensuring precise airflow geometry and leak-free sealing right out of the box.
• Leak and Pinhole Tested: Every manifold is individually tested for leaks and pinholes before shipping, so performance and reliability are built in — not an afterthought.
• OEM Sensor Port Compatibility: Weapon-R manifolds include ports for all OEM sensors, making them a true bolt-on upgrade that preserves factory electronics and drivability.
• High Boost Capability: The sheet metal construction is rated to handle significant forced induction pressure, making these manifolds suitable for both naturally aspirated and boosted applications.

Platform Coverage

Weapon-R's intake manifold lineup is focused tightly on popular Japanese sport-compact platforms — the very vehicles where bolt-on power upgrades have the most enthusiastic following. Supported fitments include Toyota and Scion platforms such as the xB, xA, and tC, as well as the Honda Fit, the Scion FR-S / Subaru BRZ / Toyota 86 chassis, and others. This targeted approach means each manifold is engineered specifically for a given engine family rather than adapted from a universal design.

The manifolds are designed as direct replacements for the factory unit, bolting onto existing mounting points and working with stock or aftermarket throttle bodies. For most applications, installation requires only basic hand tools, keeping the swap accessible even for home-garage builders.

A Complete Induction Vision

Weapon-R views the intake manifold as one piece of a larger induction system. Their broader lineup pairs these manifolds with intercooler pipe kits and thermal barrier gaskets — the latter helping to reduce heat soak between the manifold and cylinder head for cooler, denser intake charges. Enthusiasts building a serious street or track setup will find that Weapon-R's induction components are designed to work together as a cohesive system.

For anyone serious about extracting more power and throttle response from a Japanese sport-compact engine without resorting to custom fabrication, Weapon-R's sheet metal intake manifolds offer a compelling combination of race-derived design, quality materials, and practical bolt-on installation. Explore the full Weapon-R brand catalog or browse all engine intake manifolds to find the right fit for your build.