Grams Performance

If you’re planning more power, fuel and air have to keep up. Grams Performance makes fuel system and intake parts for tuners who want their engine to produce more without compromising reliability. Here you’ll find fuel injectors, fuel pumps, throttle bodies and intake manifolds for many popular engines.

American fuel and intake specialist

Grams Performance is an American brand with roots in the import and European car tuning scene. The focus is on the parts that determine how much air and fuel an engine can get: injectors, pumps, throttle bodies and manifolds. When an engine gets a turbo, a bigger compressor or more aggressive tuning, this is often where the limit lies. Grams develops its parts to fit the original connections on the most popular platforms, including Honda, Volkswagen, Subaru and Toyota, which makes the upgrade simpler.

Grams Performance’s key products

For many, fuel injectors are the most important product. They come in several sizes so you can choose the flow that suits your power target, and they often come with the right connectors and adapters for your engine. The fuel pumps ensure there is enough pressure and flow for the injectors. Grams also offers larger throttle bodies, intake manifolds and fuel rails. See each product for vehicle and engine fitment.

Buy Grams Performance from us

We specialise in performance parts and know what it takes for a project to succeed. You get a wide selection, competitive prices and personal service if you have questions along the way. Find the Grams Performance solution for your project and take the next step towards more performance.

Frequently asked questions

How do I choose the right injector size?

It depends on your power target, fuel type and how much headroom you want. Don’t choose injectors much larger than needed, as that can make idle and low load harder to tune. Ask your tuner before you order.

Does the engine need tuning after fitting larger injectors?

Yes. Larger injectors require the engine management to be adjusted to the new flow data, otherwise the mixture will be wrong. The same often applies to larger throttle bodies and manifolds.