Description

LT4 Fuel Injector & Pump Upgrade Kit for LT1, L83 & L86

High-Performance Fueling Solutions by SALINAS LSX SWAPS

If you’re pushing the limits of your LT1, L83, or L86 engine, upgrading your fuel system is not optional — it’s essential. Whether you’re running a camshaft upgrade, long tube headers, E85, or forced induction, the factory fuel system quickly becomes a bottleneck.

At SALINAS LSX SWAPS, we specialize in high-performance GM platforms, and one of the most popular upgrades we offer is the LT4 Fuel Injector & High-Pressure Pump Upgrade Kit — the proven solution for increasing fueling capacity and supporting serious horsepower gains.

Why Upgrade to an LT4 Fuel System?

The factory LT1, L83, and L86 direct injection systems are excellent for stock applications, but once horsepower increases, they struggle to deliver enough fuel volume and pressure. The LT4 injectors and high-pressure fuel pump (HPFP) were designed for the supercharged Corvette Z06 and Cadillac CTS-V, making them significantly more capable than stock components.

Key Benefits of the LT4 Injector & Pump Upgrade:

✔ Increased fuel flow capacity
✔ Supports higher horsepower builds
✔ Ideal for cammed setups
✔ Compatible with E85 tuning
✔ Necessary for supercharged and turbocharged applications
✔ OEM GM reliability

This upgrade is widely considered the gold standard for naturally aspirated and boosted LT builds.

What’s Included in the LT4 Fuel Upgrade Kit?

At SALINAS LSX SWAPS, our LT4 fuel upgrade kit typically includes:

Genuine GM LT4 Fuel Injectors (set of 8)
LT4 High-Pressure Fuel Pump (HPFP)
Required fuel lines
Installation hardware
Professional installation available
Custom tuning support (recommended)

We ensure you receive quality OEM components to maintain performance and reliability.

Horsepower Capability

When properly tuned, the LT4 fuel system upgrade can support:

Naturally Aspirated Builds: 500–550+ WHP
Boosted Applications: 650–700+ WHP (depending on setup)
E85 Applications: Improved fuel volume for ethanol blends

Every build is different, which is why we recommend consulting with our team before installation.

Vehicles Compatible with LT4 Fuel Upgrades

The LT4 injector and pump upgrade works great for:

Chevrolet Camaro SS (LT1)
Chevrolet Corvette Stingray (LT1)
Chevrolet Silverado 1500 (L83, L86)
GMC Sierra 1500 (L83, L86)
GM performance swaps

If you’re planning an LS or LT swap, this upgrade is one of the smartest supporting modifications you can make.

When Do You Need an LT4 Fuel Upgrade?

You should strongly consider upgrading if you have:

Aftermarket camshaft
Ported cylinder heads
Long tube headers
E85 conversion
Supercharger kit
Turbo kit
Increased boost levels

Running lean under load can destroy an engine. Proper fueling protects your investment.

Professional Installation & Tuning at SALINAS LSX SWAPS

Fuel system upgrades require proper calibration. At SALINAS LSX SWAPS, we don’t just install parts — we provide complete performance solutions, including:

Professional installation
Dyno tuning services
Custom LT calibration
Full engine build support
LS & LT swap services

Our experienced technicians understand the GM LT platform inside and out.

Upgrade Your LT1, L83, or L86 Today

Don’t let your fuel system hold back your build. The LT4 Fuel Injector & Pump Upgrade Kit is one of the best investments you can make for performance and reliability.

Contact SALINAS LSX SWAPS today to order your LT4 upgrade kit or schedule installation and tuning services.