Grams Performance
Grams Performance G51-99-0440 High Flow In-Tank Fuel Pump Kit E85 Compatible
Grams Performance G2-99-0060 Fuel Injector Plug & Play Adapters
Grams Performance G2-0550-0902 High Impedance Fuel Injector Set - 6 Injectors, 550cc, EV14
Grams Performance G09-10-0070 70mm Drive-By-Wire Throttle Body for 2006-2015 Mazda MX-5 Miata NC
Grams Performance G2-0550-0802 550cc Fuel Injector Set (4 Pack)
Grams Performance G2-99-0055 Wideband Air/Fuel Ratio Gauge 52mm Digital LED
Grams Performance G2-99-0107 EV14 High-Performance Fuel Injector Standard Length
Grams Performance G2-99-0030 Fuel Pressure Gauge 0-30 PSI 1.5 Inch Mechanical Black
About Grams Performance
Grams Performance is a division of Group-A Autosports Engineering, a company that has spent nearly two decades at the intersection of motorsports competition and precision automotive engineering. Born from real-world racing experience and OEM product development, Grams Performance was built specifically to serve two of the most demanding niches in the aftermarket world: European platform tuners and Modern Muscle enthusiasts. The result is a product line that balances engineering rigor with practical, bolt-on usability.
What sets Grams Performance apart from generic aftermarket suppliers is the depth of involvement behind each product. Rather than simply rebranding existing components, the team draws on active motorsports participation and extensive engineering studies to develop parts that genuinely move the performance needle. Whether a builder is chasing street reliability on a Volkswagen Golf or maximum power on a Ford Mustang Coyote, Grams Performance products are designed to deliver measurable gains without sacrificing drivability.
Induction & Throttle Body Excellence
At the heart of the Grams Performance catalog is their lineup of fuel injection throttle bodies. These CNC-machined billet 6061-T6 aluminum units feature precision-honed oversized bores and proprietary Non-Contact Hall Effect TPS sensors calibrated to each vehicle's specific engine management system. Available in multiple sizes for platforms ranging from the Mazda MX-5 Miata and Subaru BRZ/Toyota FT86 to the Ford Mustang GT 5.0L Coyote V8 and Volkswagen MKV/VI, these drive-by-wire units are designed as true plug-and-play OEM replacements—no rewiring, no mounting adapters required.
Complete Fuel System Solutions
Grams Performance approaches fuel system upgrades as an integrated ecosystem rather than a collection of isolated parts. Their fuel injectors are cold-cut with diamond grinders for high precision and feature Viton O-rings resistant to extreme temperatures and alternative fuels including methanol and ethanol. Matched sets come with dead-time compensation values to simplify tuning and ensure consistent air/fuel ratios.
Supporting the injectors is an equally well-engineered lineup of fuel injector rails and mechanical fuel pumps, spanning universal in-tank units in various flow ratings to billet dual-pump configurations for high-horsepower applications. Rounding out the fuel system suite are gauges—including silicone-filled fuel pressure gauges and wideband units—that give tuners the real-time data they need to dial in their setup with confidence.
Built for Enthusiasts, Backed by Engineering
Grams Performance products are carefully tested in controlled laboratory environments and subjected to dyno, street, and race track validation before reaching customers. This commitment to quality control means builders can trust that what arrives in the box will perform exactly as engineered—a critical consideration for any high-stakes performance build. For European and Modern Muscle tuners who refuse to compromise, Grams Performance represents one of the most focused and credible names in the specialty aftermarket.