ISR Performance - Side Feed Injectors - Nissan 750cc (set of 6)

Our 750cc side-feed injectors for Nissan 6-cylinder applications, sold as a balanced set of six. The larger sibling to our 550cc set, sized for builds that need more fuel headroom without going to a full top-feed conversion.

What It Does

Replaces your factory side-feed injectors with a flow-matched 750cc set, sized for meaningful power upgrades over stock. Every set is flow-matched within 2% variation across the transitional, low, and linear pulse-width ranges. Stainless steel internals make these E85-compatible.

Fitment

Fits Nissan 6-cylinder engines that use side-feed injectors. Primary applications: RB20DET and RB25DET. Verify your factory injector style (side-feed vs top-feed) before ordering.

Flow Rate Selection

750cc gives you headroom for higher boost and bigger turbo builds where 550cc would be running near maximum duty cycle. For more moderate builds, our IS-INJS-550-6 550cc set is the better starting point.

What's in the Box

• 6x 750cc side-feed injectors
• Injector O-rings
• Injector flow data sheet

Product Details

Brand: ISR Performance

Part Number: IS-INJS-750-6

Type: Side-Feed Injectors

Flow Rate: 750cc

Application: Nissan 6-cylinder side-feed (RB20DET, RB25DET, and similar)

Internals: Stainless steel (E85 compatible)

Flow Variation: Within 2% across transitional, low, and linear pulse-width ranges

Sold: Balanced set of 6 (with O-rings and flow data sheet)

Related: IS-INJS-550-6 (550cc 6-cyl variant); IS-INJK48441004 (1000cc top-feed for top-feed conversion applications)

Legality: Off-road and competition use only