Grams Performance

About Grams Performance

Grams Performance is a division of Group-A Autosports Engineering, a company with nearly two decades of motorsport and OEM engineering experience behind it. The brand was built with a clear mission: deliver the highest-quality aftermarket performance components specifically engineered for European and Modern Muscle tuning enthusiasts. Whether you're building a turbocharged Volkswagen, a boosted Subaru, or a high-horsepower American muscle car, Grams Performance has designed its product lineup with your platform in mind.

What separates Grams from the crowd is its development process. Every product is planned and designed in-house using the latest computer simulation and modeling techniques, then validated through careful laboratory testing before being subjected to rigorous dyno, street, and race track evaluation. The result is a catalog that top street cars and race cars worldwide have come to rely on.

Induction – Throttle Bodies & Intake Manifolds

At the heart of any performance induction system is airflow, and Grams Performance takes that seriously. Their fuel injection throttle bodies are engineered as plug-and-play, direct OEM replacements — no swapping electric motors, no wiring changes, no mounting adapters required. Offered in sizes like 70mm and 72mm Drive-By-Wire configurations for platforms ranging from MKIV Volkswagen to the Scion FR-S and Subaru BRZ, they allow enthusiasts to unlock restricted factory airflow without the fitment headaches.

Complementing the throttle body lineup is a well-thought-out selection of intake manifolds. Grams' signature two-piece modular design features a removable plenum lid that allows for easy disassembly, porting, and plenum volume adjustments — and can even be rotated to position the throttle body on either the driver or passenger side of the engine bay. It's the kind of flexible engineering that serious builders appreciate.

Fuel System – Injectors, Rails & Pumps

A strong induction system demands an equally capable fuel system. Grams Performance offers a comprehensive fuel system lineup spanning everything a builder needs from tank to rail. Their fuel injectors are available in a wide range of flow rates — from 350cc all the way up to 2400cc — with vehicle-specific fitments covering platforms from Honda and Acura to BMW, Subaru, Ford, Dodge, and Audi/VW. Premium materials, advanced manufacturing techniques, and stringent quality control define every injector they produce.

For builders who need to move serious volume of fuel under boost or high-RPM conditions, the brand's fuel pumps — including in-tank and inline options rated from 265 LPH to 355 LPH — deliver the flow rates modern performance applications demand. Paired with Grams' billet fuel injector rails, which are available in multiple port configurations and designed for a clean, professional installation, you can build a complete, properly matched fuel system from a single trusted source.

Who Grams Performance Is Built For

Grams Performance products are engineered for enthusiasts who refuse to compromise. Active involvement in competitive motorsports — combined with deep roots in OEM product development — keeps the engineering team at the forefront of automotive performance. If you're serious about extracting real power from a European or Modern Muscle platform, Grams Performance belongs in your build.