Next Level Performance
August 24, 2026 • 11 min read
Our Verdict
For a built VR38DETT chasing four-figure power on E85, the Injector Dynamics 2600-XDS injector set is the R35 fueling upgrade we reach for first.
The 2,600 cc/min ID 2600-XDS ($2,390.85) keeps idle and cruise clean while flowing enough fuel for 1,400-plus horsepower builds. Pair it with a DeatschWerks X3 triple-pump module and a Radium fuel-rail plumbing kit and your R35 will never run out of fuel before the turbos run out of air.
Shop Our Top Pick →A Nissan GT-R R35 fuel system upgrade is the single most important step between a tuned 2009-2021 GT-R and a genuine big-power street or track car. The twin-turbo 3.8L VR38DETT is famously willing, but its factory injectors and in-tank pumps run out of headroom around 650-700 wheel horsepower — and every extra pound of boost, every switch to E85, and every larger turbo demands more fuel volume. This guide walks through exactly which injectors, fuel pumps, and rails to bolt on, in what order, and how much power each stage of R35 fueling actually supports. Every part below is in stock at NLP Performance in Tampa, FL, and fits the 2009-2021 R35 VR38DETT.
Why the R35 GT-R Needs a Fuel System Upgrade
The stock Nissan GT-R R35 fuel system tops out around 650-700 wheel horsepower. The factory VR38DETT runs six port injectors fed by two in-tank pumps, and that hardware was sized for the roughly 480-565 crank hp the GT-R made from the factory across the 2009-2021 run. Add a tune, more boost, bigger turbos, or E85 and the injectors quickly hit 100 percent duty cycle while rail pressure sags under sustained load — both of which cause a dangerous lean condition at exactly the RPM where the twin-turbo motor is making the most cylinder pressure.
Fuel is the cheapest insurance on a built VR38. A single lean spike at 25 psi can crack a ring land or melt a piston, so experienced GT-R tuners upgrade fueling before chasing the last few pounds of boost. At NLP Performance we treat 600 whp as the practical ceiling for stock fueling and recommend planning your injector and pump package around your final power goal, not your current one, so you are not paying to open the tank twice.
How Much Fuel Does Your Power Goal Need?
Sizing an R35 fuel system comes down to two numbers: injector flow (measured in cc/min) and pump volume (measured in lph, liters per hour). As a rule of thumb, a set of six injectors flowing 1,000 cc/min supports roughly 700-800 hp on gasoline; 1,500 cc/min covers 900-1,000 hp; and 2,600 cc/min opens the door to 1,400-plus hp. Pumps scale the same way — a single 430 lph pump handles Stage 1-2 duty, while a triple-pump module flowing around 1,290 lph keeps the rails full past 1,000 hp.
The wild card is fuel type. E85 makes fantastic power in the VR38DETT thanks to its ~105 octane and strong charge cooling, but it requires roughly 30 percent more volume than gasoline to make the same power. That means an E85 car should size both injectors and pumps one tier larger than an otherwise identical pump-gas build. Our top pick below is built for exactly that scenario.
Key Specifications — Injector Dynamics 2600-XDS (Set of 6)
Step 1 — Upgrade Your Fuel Injectors
Injectors are the first upgrade on any high-power R35 because they set the ceiling on how much fuel each cylinder can receive. Below are the three injector sets we fit most often, from a plug-and-play 1,000 cc kit to a built-motor 2,600 cc set. All three are complete sets of six for the VR38DETT and drop into the factory or an aftermarket rail.
HKS 1,000 cc/min injectors drop straight into the VR38DETT rail.
DeatschWerks flow-matches every EV14 set within one percent for consistent fueling.
The EV14 uses a USCAR connector and a compact body that fits the VR38 without adapters.
Step 2 — Upgrade Your Fuel Pumps
Injectors are only half the equation. Larger injectors demand more volume, and if the in-tank pumps cannot keep the rails pressurized, the engine still leans out at redline. The R35 uses a twin-pump setup from the factory; the upgrades below either add a compact single pump for Stage 1-2 duty or replace the entire hanger with a high-flow triple-pump module for 1,000-plus horsepower.
The X3 module's plug-and-play harness replaces the entire R35 fuel hanger.
Not ready for a full triple-pump module? The DeatschWerks DW430C 430 lph compact pump ($178.70) is the entry point: a single high-flow in-tank pump that shores up Stage 1-2 fueling for a fraction of the cost. It is the smart first move on a car that will grow into a full module later, and pairs naturally with 1,000-1,500 cc injectors.
Step 3 — Fuel Rails and Plumbing
The final piece is getting fuel from the pumps to the injectors reliably. As flow demands climb, factory feed lines and fittings become a restriction, and big injectors need proper -8AN plumbing to breathe. A dedicated plumbing kit also makes the whole system serviceable and leak-free — important when you are running ethanol.
Radium's -8AN plumbing kit removes the factory feed-line restriction.
R35 GT-R Fuel System Comparison
Here is how the six upgrades in this guide stack up by type, flow rating, and the power each one supports. Match your injectors and pumps to your final horsepower target — and remember to size up one tier if you plan to run E85.
| Kit | Type | Flow Rating | Supports | Price |
|---|---|---|---|---|
| Injector Dynamics 2600-XDSTop Pick | Injectors (6) | 2,600 cc/min | 1,400+ hp / E85 | $2,390.85 |
| DeatschWerks X3 Triple Pump | Fuel Pump Module | ~1,290 lph (3x430) | 1,000+ hp | $1,753.58 |
| HKS VR38 1000cc Kit | Injectors (6) | 1,000 cc/min | 700-800 hp | $1,740.00 |
| DeatschWerks EV14 1500cc | Injectors (6) | 1,500 cc/min | 900-1,000 hp | $1,208.64 |
| Radium Fuel Rail Plumbing | Fuel Rail / -8AN | Plumbing kit | Big-injector support | $617.45 |
| DeatschWerks DW430C Pump | In-Tank Pump | 430 lph | Stage 1-2 fueling | $178.70 |
What We Like
- + 2,600 cc/min flow supports 1,400-plus hp on E85 without maxing duty cycle
- + XDS extended dynamic range keeps idle and part-throttle cruise smooth
- + Data-matched set of 6 with published characterization data for easy tuning
Things to Consider
- – Overkill for a stock-turbo Stage 1 car — 1,000-1,500 cc is plenty there
- – Cannot ship to California (CARB); requires professional tuning to deploy safely
Installation and Tuning Notes
DeatschWerks drop-in pump modules and plug-and-play injector sets can be fitted by a mechanically confident owner with hand tools in an afternoon, and the X3 module's plug-and-play harness avoids any wire cutting. The non-negotiable step is calibration: new injector characterization and pump data must be loaded and the tune verified on a dyno or with careful data logging before the car sees boost. Never run upgraded fueling on the stock GT-R calibration. If you are already running a Cobb Accessport, see our R35 GT-R Cobb tuning guide for flex-fuel and Stage 1+ package details. Note also that some big-injector sets, including the Injector Dynamics 2600-XDS, cannot ship to California under CARB emissions rules.
Frequently Asked Questions
How much horsepower can the stock R35 GT-R fuel system support?
The factory VR38DETT fuel system supports roughly 650-700 wheel horsepower on pump gas before the stock injectors and in-tank pumps hit their limit. Once you add larger turbos, more boost, or E85, you need upgraded injectors and pumps to avoid running lean at high RPM. Most tuners recommend upgrading fueling before you exceed about 600 whp for a safety margin.
What size injectors do I need for my R35 GT-R?
For a Stage 1-2 R35 on pump gas or a light E85 tune, 1,000-1,500 cc/min injectors like the HKS VR38 1000cc kit or DeatschWerks EV14 1500cc set are ideal, supporting 700-1,000 hp. For a built engine chasing 1,200-1,500+ hp on E85, step up to the 2,600 cc/min Injector Dynamics 2600-XDS. Bigger is not always better: oversized injectors can hurt idle quality without proper characterization data, which is why data-matched sets matter.
Do I need to upgrade the fuel pumps and the injectors together?
Yes, on a high-power R35 GT-R you should upgrade both. Injectors control how much fuel can be sprayed per cycle, while the pumps control how much volume reaches the rails under sustained load. Big injectors starved by weak pumps will still run lean at redline. A triple-pump module like the DeatschWerks X3 (roughly 1,290 lph) keeps rail pressure stable for 1,000-plus horsepower alongside large injectors.
Is E85 worth it on a Nissan GT-R R35?
E85 is one of the best value power adders for the R35 because its high octane and cooling effect let the VR38DETT run more boost and timing safely. The trade-off is fuel volume: E85 needs roughly 30 percent more flow than gasoline, so it accelerates the need for bigger injectors and pumps. Cars planning to run E85 should size fueling one tier larger than an equivalent pump-gas build.
What is a fuel rail plumbing kit and do I need one?
A fuel rail plumbing kit, such as the Radium Engineering VR38DETT kit, provides the -8AN fittings, lines, and hardware to properly feed larger injectors and aftermarket rails on the R35. It ensures adequate fuel delivery and clean, leak-free connections when you move beyond stock flow. It is recommended on any serious big-injector build and any car converting to an external or return-style fuel setup.
Can I install R35 fuel injectors and pumps myself?
Mechanically inclined owners can install DeatschWerks drop-in pump modules and plug-and-play injectors in a home garage with hand tools, and the DW X3 module uses a plug-and-play harness to simplify wiring. However, the car must be professionally tuned afterward: new injector and pump data has to be loaded and the tune verified on a dyno or with data logging to avoid a lean condition. Never run upgraded fueling on the stock calibration.
Build Your R35 Fuel System at NLP Performance
Injectors, pumps, rails and full VR38DETT engine hardware for the 2009-2021 Nissan GT-R, in stock and ready to ship.
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