Grams Fuel Injectors & Rails for WRX, EVO, K20, 2JZ, RB & LS

What This Grams Performance Collection Covers

Grams Performance focuses on fuel delivery components that must work as a system. Injector flow, calibration data, fuel pressure, pump capacity and rail fitment all affect the tune and reliability of a finished build.

Injector Flow Rates and Fuel Choice

Choose injector capacity from the power goal, fuel type, cylinder count and realistic duty cycle. E85 needs greater fuel volume than gasoline, so the correct injector size often changes when a flex fuel or ethanol tune is planned.

Fuel Rails and Feed Layout

A billet fuel rail provides a secure path from the supply line to each injector. Confirm the engine family, injector length, inlet connection and return or returnless fuel system layout before ordering.

Calibration Data for Tuning

Injector characterization data helps the tuner build a stable idle and accurate fuel delivery across voltage, load and engine speed. Enter the supplied data correctly and confirm fuel pressure before final calibration.

Fuel Pumps, Filters and Regulators

An injector can only supply fuel that the pump and feed system deliver. Pair high flow injectors with a suitable pump, filter, line size, regulator and electrical supply for the target power level.

Import and LS Engine Platforms

This collection supports popular Subaru, Mitsubishi, Honda, Toyota, Nissan and GM projects. Use the fitment filter for the correct WRX STI, EVO, K20 K24, B18, D16, 2JZ, RB or LS application.

Top Grams Performance Brands and Product Lines

• 550 cc injectors. Mild performance and responsive street tuning range
• 750 cc injectors. Increased flow for boosted four cylinder builds
• 1000 cc injectors. Popular size for turbo and ethanol ready projects
• 1150 cc injectors. Higher fuel demand applications
• 1600 cc injectors. Serious E85 and high boost combinations
• 2200 cc injectors. Maximum flow competition oriented builds
• Billet fuel rails. Application specific fuel distribution
• In tank pumps. Compact electric fuel supply upgrades
• Fuel filters. Protect injectors from contamination
• Pressure gauges. Verify fuel system operation
• Pressure regulators. Set and control base fuel pressure
• Injector adapters. Match injector height and connector needs
• Throttle bodies. Increased airflow support components
• Wideband gauges. Monitor air fuel ratio while tuning
• Fuel system fittings. Complete feed and return plumbing

How to Choose the Correct Grams Performance

• Confirm engine code and chassis before selecting an injector set
• Choose flow rate for horsepower, fuel type and target injector duty cycle
• Verify connector style, injector height and seal dimensions
• Match fuel rail fitment to the intake manifold and injector size
• Confirm fuel pump flow at the operating pressure
• Use a suitable fuel filter and inspect it during service
• Check regulator compatibility with return or returnless fuel systems
• Provide injector characterization data to the tuner
• Confirm ethanol compatible seals and lines for E85 use
• Pressure test the completed fuel system before tuning

Common Questions

What does this grams performance collection include?

This collection includes application specific parts and support components selected for compatible vehicle and engine combinations.

How do I confirm grams performance fitment?

Use the year, make, model, trim, engine and drivetrain filters, then review the product notes before ordering.

Can I use these parts on a daily driven vehicle?

Many products are suitable for daily driving when selected for the correct application. Review the product details for intended use and service needs.

Do I need other components for installation?

Some upgrades work best with related service parts, hardware or matched system components. Review the installation requirements before starting work.

Should I reuse old hardware?

Inspect existing hardware and replace worn, damaged or single use components according to the vehicle and manufacturer guidance.

Do I need professional installation?

Installation difficulty varies. Complex fuel, clutch, cooling and engine internal work is best handled by an experienced shop.

How do I choose the correct specification?

Match the product specification to the vehicle, engine, power goal, driving use and the other parts in the system.

Do these products include manufacturer warranty coverage?

Warranty terms vary by brand and product. Review the individual product page and manufacturer policy for the applicable coverage.

How quickly do orders ship?

Most stocked orders ship promptly from a warehouse. Product availability and transit time can vary by brand and destination.

Can Black Ops Auto Works help before I order?

Yes. Use the fitment information on each listing and contact the team when you need help confirming the correct application.

Why Buy Grams Performance from Black Ops Auto Works

Black Ops Auto Works stocks 45 Grams Performance SKUs with fitment data, competitive pricing and support from staff who build and maintain these vehicles. Products are filterable by year, make, model, trim, engine and drivetrain to help confirm the correct application before ordering.

For focused shopping, browse our fuel injectors, four cylinder injector sets, six cylinder injector sets, eight cylinder injector sets, fuel rails, fuel pumps, Walbro fuel pumps, Radium Engineering fuel parts.