Injector Dynamics 2600-XDS Fuel Injectors - Set of 2 | 1979-1986 Mazda RX-7 SA/FB | 11mm Top (-204 Adapter), 60mm, 11mm Lower O-Ring (2600.11.03.60.11.2)

Feed your SA/FB RX-7's rotary engine with the Injector Dynamics 2600-XDS fuel injectors. Rated at 2600cc/min, featuring the XDS (Xtreme Dynamic Spray) disc-style internals, full E85 compatibility, and Injector Dynamics' industry-leading characterization data, this set of 2 is engineered specifically for the 1979-1986 Mazda RX-7 SA/FB with 11mm top O-ring (-204 adapter), 60mm body length, and 11mm lower O-ring.

Key Features:

• 2600cc/min flow rate
• Set of 2 injectors (matches SA/FB RX-7 2-injector fuel system)
• 11mm top O-ring with -204 adapter
• 60mm body length
• 11mm lower O-ring
• XDS (Xtreme Dynamic Spray) disc-style internals
• E85 and ethanol compatible
• Full characterization data included
• Injector Dynamics quality and engineering

Performance Benefits:

• 2600cc Flow: Massive flow capacity for high-power rotary builds on gasoline or E85
• XDS Technology: Superior atomization for improved combustion efficiency
• E85 Compatible: Handles ethanol blends without degradation
• Precise Tuning: Full characterization data enables accurate fuel modeling
• Linear Response: Disc-style internals provide consistent, predictable flow
• Set of 2: Correct quantity for the SA/FB RX-7's 2-injector fuel system

Technical Specifications:

• Brand: Injector Dynamics
• Part Number: 2600.11.03.60.11.2
• Model: 2600-XDS
• Flow Rate: 2600cc/min @ 3 bar (43.5 psi)
• Quantity: Set of 2
• Top O-Ring: 11mm (with -204 adapter)
• Body Length: 60mm
• Lower O-Ring: 11mm
• Internals: XDS disc-style
• Fuel Compatibility: Gasoline, E85, ethanol blends
• Characterization Data: Included
• Weight: 1.0 lb

Fitment Information:

• 1979-1985 Mazda RX-7 SA (Series 1-3) - 12A and 13B rotary
• 1986 Mazda RX-7 FB (Series 4) - 13B rotary
• Note: Verify injector dimensions (11mm top O-ring with -204 adapter, 60mm body, 11mm lower O-ring) match your fuel rail before ordering
• Note: Set of 2 matches the SA/FB RX-7's 2-injector fuel delivery system
• Tuning: Professional ECU tuning required after installation

What's Included:

• 2x Injector Dynamics 2600-XDS fuel injectors
• Injector characterization data
• Installation instructions
• Note: Professional ECU tuning required - not a plug-and-play upgrade

Installation Notes:

• Professional installation and ECU tuning strongly recommended
• Verify injector dimensions match your SA/FB fuel rail before installation
• Remove factory injectors and install 2600-XDS injectors
• Provide characterization data to your tuner
• Professional dyno tuning required for safe, optimal operation
• Fuel system upgrades (pump, lines, regulator) will be required to support 2600cc injectors

Why Set of 2? The SA/FB RX-7 Rotary Fuel System:

The 1979-1986 Mazda RX-7 SA and FB use a 2-rotor Wankel rotary engine (12A or 13B) with a fuel injection system that uses only 2 primary injectors — one per rotor. This is fundamentally different from piston engines, where each cylinder has its own injector. The rotary's unique combustion process means that 2 injectors must supply fuel for the entire engine, and at high power levels, these injectors must flow very high volumes of fuel. The 2600cc flow rate of the ID 2600-XDS is appropriate for high-power SA/FB rotary builds where the fuel demand exceeds what smaller injectors can supply. Always replace both injectors simultaneously for consistent fuel delivery across both rotors.

2600-XDS - High Flow Rotary Injector:

The ID 2600-XDS is Injector Dynamics' highest-flow injector, designed for extreme power applications. At 2600cc/min (approximately 247 lb/hr) at 3 bar, these injectors can support very high power levels on gasoline or E85. The "XDS" designation indicates the Xtreme Dynamic Spray technology — an advanced disc-style atomizer that provides superior fuel atomization compared to conventional ball-and-seat injectors. Better atomization means smaller fuel droplets, more complete combustion, and improved power and efficiency. The disc-style internals also provide excellent linearity across the full duty cycle range, from idle to wide-open throttle.

11mm Top O-Ring with -204 Adapter:

The 11mm top O-ring with -204 adapter configuration is specific to the SA/FB RX-7 fuel rail. The -204 adapter is an intermediate fitting that allows the 2600-XDS injector to interface correctly with the SA/FB fuel rail's injector pocket. The 60mm body length and 11mm lower O-ring complete the dimensional specification. Always verify these dimensions match your specific SA/FB fuel rail configuration before ordering — incorrect dimensions can result in fuel leaks or improper injector seating. If you are unsure of your fuel rail's specifications, consult your engine builder or tuner.

XDS Technology - Superior Atomization:

The XDS (Xtreme Dynamic Spray) technology uses an advanced disc-style atomizer to break fuel into extremely fine droplets. Finer fuel droplets have greater surface area relative to their volume, allowing them to vaporize more quickly and completely in the intake charge. More complete vaporization means more complete combustion, which translates to improved power output, better fuel efficiency, and reduced emissions. For the rotary engine, which has a unique combustion chamber geometry and longer combustion event than a piston engine, superior atomization is particularly beneficial for ensuring complete combustion across the rotor's travel.

E85 and Ethanol Compatibility:

The 2600-XDS injectors are fully compatible with E85 and other ethanol blends. E85 requires approximately 30-40% more fuel volume than gasoline due to its lower energy density, making high-flow injectors like the 2600-XDS essential for E85 rotary builds. The internal components and seals are resistant to ethanol's corrosive properties, ensuring long service life even with sustained E85 use. For SA/FB RX-7 builds targeting high power on E85, the 2600cc flow rate provides ample capacity — pair with an appropriate fuel pump and flex fuel tune for a complete E85 fuel system.

Fuel System Requirements:

Installing 2600cc injectors on an SA/FB RX-7 requires a fuel system capable of supplying adequate fuel volume and pressure. At high duty cycles, 2x 2600cc injectors demand significant fuel flow from the pump. An upgraded fuel pump, high-flow fuel lines, and an adjustable fuel pressure regulator are typically required alongside injectors of this size. Your tuner can advise on the specific fuel system requirements based on your target power level and fuel type. Do not install high-flow injectors without verifying the fuel system can support them.

Characterization Data - The Injector Dynamics Advantage:

Every set of Injector Dynamics injectors comes with comprehensive characterization data describing the injector's precise flow behavior across different pulse widths, fuel pressures, and temperatures. This data is used by your tuner in the ECU to accurately model fuel delivery, enabling a more precise and efficient tune. Without accurate characterization data, tuners must estimate injector behavior, which can result in a less accurate tune. The Injector Dynamics characterization data is recognized and supported by all major ECU platforms including Haltech, Link, AEM, Motec, and others.

SA/FB RX-7 Platform:

The 1979-1986 Mazda RX-7 SA and FB are the original RX-7 generations, powered by the 12A (SA) or 13B (FB) 2-rotor Wankel rotary engine. These early RX-7s are beloved for their lightweight, balanced chassis, and the unique character of the rotary engine. High-power SA/FB builds are a niche but passionate segment of the rotary community, often involving significant engine modifications, forced induction, and fuel system upgrades to support power levels far beyond the factory output. The ID 2600-XDS is appropriate for the most demanding SA/FB builds where maximum fuel flow is required.

Why Injector Dynamics?

Injector Dynamics is the industry standard for high-performance fuel injectors, trusted by professional engine builders, race teams, and tuners worldwide. Their commitment to providing accurate characterization data sets them apart from competitors, enabling more precise and reliable tunes. Injector Dynamics injectors are used in championship-winning race cars and high-power street builds worldwide, including demanding rotary applications.

Perfect For:

• 1979-1986 Mazda RX-7 SA/FB high-power rotary builds requiring maximum fuel flow
• E85 SA/FB rotary builds needing high-flow ethanol-compatible injectors
• SA/FB builds with forced induction requiring 2600cc injectors
• Any SA/FB RX-7 application needing accurate characterization data for precise rotary tuning
• Professional builds demanding Injector Dynamics quality on the SA/FB rotary platform

Perfect For: 1979-1986 Mazda RX-7 SA/FB owners seeking Injector Dynamics 2600-XDS injectors for maximum fuel flow on high-power rotary builds on gasoline or E85.

Pro Tip: Provide your tuner with the Injector Dynamics characterization data before your dyno session — accurate injector data is especially critical on the rotary engine's unique fuel delivery system, where precise fuel modeling directly impacts power and reliability.

Set of 2 for Rotary: 2600cc/min @ 3 bar. XDS disc-style atomizer. 11mm top with -204 adapter. 60mm body. 11mm lower O-ring. E85 compatible. Characterization data included. Professional tuning required.

Fuel your SA/FB RX-7 rotary build with Injector Dynamics 2600-XDS — 2600cc flow, XDS atomization, E85 compatible, industry-leading characterization data, set of 2 for the rotary fuel system.