Description

What sets Nostrum apart:

66% Larger than stock B58 Gen 1
Direct Fit, no harness or spacers required
Ethanol Compatible
OEM equivalent spray pattern
Every injector is tested statically and dynamically to ensure best quality product and set batching
Includes comprehensive installation guide

Fuel upgrades for the B58 Gen 1 are finally here! Nostrum’s Stage 2 injectors are for those looking to take their Gen 1 B58 to the next level, without having to rely on secondary fuelling. With 66% more fuel flow than the stock B58 Gen 1 injectors, the Stage 2’s will allow for a significant increase in horsepower, with proper tuning. Nostrum estimate that these injectors will flow enough fuel to make nearly 900 wheel horsepower.

Inside the box, you will find everything you need to get your new injectors installed quickly, including detailed installation instructions. When you are ready to tune, Nostrum has injector tuning data available for your tuner. Being that everything is installed like a factory part, there’s no need to worry about secondary injection controllers, filling meth tanks, clogged meth injectors, or any of the other complex solutions people use to squeeze more power out of these vehicles. Additionally, these injectors are operating with all the OEM ECU’s engine management system diagnostics and safety functions – resulting in a much happier and responsive system!

Every Nostrum manufactured part is backed by a limited lifetime warranty. Our products are comprehensive solutions that come complete with everything you need inside the box, including detailed installation instructions. Tuning guides are also available for your dealer or tuner. We have customer service and calibration engineers on staff to provide you with any support that you may need, from installation to tuning.

Frequently asked questions:

Will these work in a Gen 2 B58?
The Gen 1 injectors are intended for use with the Gen 1 B58 only. The Gen 2 B58, like the one found in the A90 Supra, uses a 350 bar high pressure fuel system from the factory, where the Gen 1 engine uses a 250 bar system.

I see a lot of mentions about OEM equivalent spray patterns. What does that mean and why is it important?
While increasing flow rate is critical to making more horsepower, there are other factors to consider when choosing fuel system upgrades. A bigger injector isn’t always a better injector! It can flow a large volume of fuel at WOT, but if the spray pattern is poor, you can expect poor idle quality, poor drivability, increased knock propensity, soot, NVH (noise vibration harshness,) and tuning difficulty. Additionally, the wrong spray pattern can result in liquid fuel impinging in the cylinder walls, causing oil dilution, which increases mechanical wear to internal engine components.

Nostrum has invested significant time and resources into acquiring the equipment and machinery necessary to deliver an OEM level of quality on our injectors. Nostrum’s spray patternation and arc flash machines (images below) give us an unparalleled look at how an OEM injector is designed and how it operates. Their engineers design and develop injectors to optimally interact with engine air flow inside the combustion chamber to improve fuel evaporation and create a homogenous air-fuel mixture that results in a higher combustion quality. For you, this means that you can expect our injectors to perform at their absolute best regardless of what you are asking from them, from daily driver duty to setting new ¼ mile records.

Installation Guide

Tuning Guide