Upgraded Fuel Injectors
Direct plug-and-play replacements for your stock fuel injectors — no tune, no flash, no engine modifications. Multi-hole Bosch spray nozzles correct the known factory defects on Siemens-equipped Dodge, Jeep, BMW, and Audi platforms while delivering measurably better atomization, torque, horsepower, and fuel economy.
What an Upgrade Injector IS
- • Direct OEM-fit electrical and fuel-rail interface
- • Calibrated to match your factory ECU fuel map
- • Multi-hole spray nozzle (typically 4-hole or 6-hole)
- • Plug-and-play — install, start, drive
- • Lifetime warranty on materials and workmanship
What it is NOT
- • Not a racing or competition injector
- • Not for forced-induction custom builds
- • Not requiring an ECU tune, flash, or remap
- • Not requiring fuel-pump or rail modifications
- • Not over-sized — flow rate stays within OEM spec
Six Benefits Over Worn Stock Injectors
Independent test results and customer feedback from over a thousand upgraded sets shipped from our Glendale, California facility.
Better Fuel Atomization
Multi-hole nozzles produce a finer, more uniform fuel mist than single-pintle stock injectors — promoting complete combustion in every cylinder.
Increased Torque
More efficient combustion delivers higher cylinder pressure, translating to measurable low-end and mid-range torque gains without changing engine mods.
Improved Horsepower
Tighter spray patterns and faster injector response time recover horsepower that worn or under-spec stock injectors leave on the table.
Corrects Factory Defects
Many OEM injectors (notably Siemens Deka on Dodge/Jeep, certain Audi/BMW) ship with known leak or atomization issues. Upgraded units fix the root design problem.
Direct Plug-and-Play
Exact OEM electrical connector, fuel-rail O-ring, length, and impedance. Drop in — no tune, no flash, no remap, no modifications required.
Better Fuel Economy
Cleaner combustion means less unburned fuel down the exhaust. Many customers report measurable MPG gains after switching from worn OEMs.
When the OEM Injector Is the Problem
Several major OEM injector designs have well-documented failure modes that even a fresh OEM replacement does not solve. Aurus addresses these at the root by swapping in a Bosch multi-hole nozzle in the same physical and electrical envelope.
Dodge Ram 1500 · Jeep Grand Cherokee · Dodge Durango
OEM Issue: Siemens Deka / Bosch EV1 single-pintle injectors with sticky pintles, internal leakage, and uneven cylinder-to-cylinder flow.
Aurus Fix: Bosch 4-hole multi-hole spray nozzle, fully remanufactured with new internals — direct replacement, same length, same impedance, no tune needed.
Result: Eliminates cold-start hesitation, P0300 misfire codes, and the well-documented fuel smell at idle on the Magnum 4.7L and 5.7L HEMI.
BMW 3-Series · 5-Series · X3 · X5 (N52/N54 era port-side units)
OEM Issue: Original Siemens VDO injectors prone to coil failure and erratic flow on high-mileage units — triggering 29CC/29CD fault codes.
Aurus Fix: Bosch multi-hole upgrade with stronger coil and improved spray cone — same plug connector, same return-line geometry.
Result: Restores smooth idle, eliminates limp-mode events, and improves cold-start cranking time.
Audi A4 · A6 · VW Passat (1.8T port-injection generation)
OEM Issue: Aftermarket-replaced Siemens injectors often deliver poor atomization on the 1.8T, contributing to carbon build-up on intake valves.
Aurus Fix: Bosch multi-hole replacement matched to factory 19 lb/hr flow rate — direct EV1 connector fit.
Result: Cleaner intake valves over time, better throttle response, and reduced cold-start enrichment fuel-smell.
Ford Ranger · Mazda B4000 · Ford Explorer (4.0L V6 SOHC era)
OEM Issue: Original 14 lb/hr single-pintle injectors produce a wide spray and uneven cylinder fueling on the 4.0L V6 — known cause of long-term injector clog and rough idle.
Aurus Fix: Bosch 4-hole 19 lb/hr upgrade — direct fit on the same fuel rail with the original electrical connector and O-rings.
Result: Smoother idle, faster throttle response, and noticeably better MPG on the Explorer/Ranger 4.0L.
Shop Upgraded Injectors — 94 products
Each unit ships fully remanufactured with new internals, calibrated to the original OEM flow rate, and individually flow-tested before packaging.
OEM Aurus Fuel Injectors - Made in the USA
Aurus OEM Set of 8 Fuel Injectors for 2000 Chevrolet Silverado GMC Yukon 6.0L 4hole 25320288
$179.99
OEM Remanufactured Injectors
Bosch OEM Set of 8 4 HOLE Fuel Delivery & Engine Sufficiency Fuel Injectors for 1994-1998 Lincoln Mercury Ford V8
$179.99
Lifetime
OEM Aurus Fuel Injectors - Made in the USA
Aurus OEM Fuel Injector for 2004-2009 Mazda RX-8 1.3L R2 195500-4430
$39.99
Lifetime
OEM Remanufactured Injectors
Bosch OEM Set of 8 Fuel Injectors 19LB 4 HOLE Fuel Delivery & Engine Sufficiency for 1994-1998 Lincoln Mercury Ford V8
$179.99
Lifetime
OEM Aurus Fuel Injectors - Made in the USA
Aurus OEM Fuel Injector 1 for Delphi Square Plug 2 Hole Nozzle 125cc Motorcycle Bike 125cc Delphi EV1
$69.99
OEM Remanufactured Injectors
Bosch OEM Set of 8 Fuel Injectors 27LB 4 HOLE Fuel Delivery & Engine Sufficiency for 1994-1998 Lincoln Mercury Ford V8
$179.99
Lifetime
OEM Aurus Fuel Injectors - Made in the USA
Aurus OEM Fuel Injector for Toyota 1.8L L4 195500-3660 23209-0D040 12hole 23250-22040
$39.99
Lifetime
OEM Remanufactured Injectors
Bosch OEM Set of 8 Fuel Injectors 30LB 4 HOLE Fuel Delivery & Engine Sufficiency for 1994-1998 Lincoln Mercury Ford V8
$189.99
Lifetime
OEM Aurus Fuel Injectors - Made in the USA
Aurus OEM Fuel Injector Motorcycle Long Plug Six Holes 125CC for Yamaha Long Plug 125CC
$69.99
OEM Remanufactured Injectors
Bosch OEM Set of 8 Fuel Injectors 19LB 12 HOLES Fuel Delivery & Engine Sufficiency for 94-1998 Lincoln Mercury Ford V8
$179.99
Lifetime
OEM Aurus Fuel Injectors - Made in the USA
Aurus OEM Set of 4 Fuel Injectors for Toyota 1.8L L4 195500-3660 23209-0D040 12hole 23250-22040
$159.99
Lifetime
OEM Remanufactured Injectors
Bosch OEM Set of 8 Fuel Injectors 24LB 12 HOLES Fuel Delivery & Engine Sufficiency for 94-1998 Lincoln Mercury Ford V8
$199.99
Lifetime
OEM Aurus Fuel Injectors - Made in the USA
Aurus OEM Fuel Injector Motorcycle BT-MTC-B 6 Hole 110CC for Honda Sundiro Wuyang
$40.99
OEM Remanufactured Injectors
Bosch OEM Set of 8 Fuel Delivery and Engine Efficiency 4 Hole 19LB Fuel Injectors for 1992-2003 Bronco E-150, E-250, E-350 V8
$189.99
Lifetime
OEM Aurus Fuel Injectors - Made in the USA
Aurus OEM Set of 6 Fuel Injectors for 2002 2003 Dodge Ram 1500 Jeep Liberty 3.7L 4Hole 0280155972
$159.99
Lifetime
OEM Remanufactured Injectors
Bosch OEM Set of 8 Fuel Delivery and Engine Efficiency 12 Hole 22LB Fuel Injectors for 1992-2003 Bronco E-150, E-250, E-350 V8
$199.99
Lifetime
OEM Aurus Fuel Injectors - Made in the USA
Aurus OEM Fuel Injector for 2002 2003 Dodge Ram 1500 Jeep Liberty 3.7L 4Hole 0280155972
$39.99
Lifetime
OEM Remanufactured Injectors
Bosch OEM Set of 8 Fuel Delivery and Engine Efficiency 12 Hole 20LB Fuel Injectors for 1992-2003 Bronco E-150, E-250, E-350 V8
$209.99
Lifetime
OEM Aurus Fuel Injectors - Made in the USA
Aurus OEM Set of 6 Fuel Delivery and Engine Efficiency 4 Hole Fuel Injectors for 1999-2004 Jeep 4.0L I6
$199.99
Lifetime
OEM Aurus Fuel Injectors - Made in the USA
Bosch OEM Set of 6 Fuel Delivery and Engine Efficiency Fuel Injectors 4 HOLE for 1993-1998 Cherokee Wrangler TJ 4.0L
$149.99
Lifetime
Frequently Asked Questions
Are upgraded injectors the same as racing or performance injectors?
No — and this is the most common misunderstanding. Aurus Upgraded Injectors are direct plug-and-play replacements for your stock injectors. They keep the same flow rate (or one-step-larger in well-matched cases), same connector, same length, and same impedance. There is no tune, no flash, no remap, and no engine modification required. Racing or performance injectors are designed for forced induction or modified engines and almost always require a custom calibration. Our upgrade tier sits between OEM replacement and race-only parts.
Do I need an ECU tune or flash to install these?
No. Every upgraded injector in this collection is calibrated to match the original OEM fuel map. Install, start, drive. If your vehicle ever needs a re-learn (some OBD-II vehicles relearn fuel trims in the first ~30 miles), that happens automatically.
How does a multi-hole nozzle help over the stock pintle injector?
Single-pintle injectors produce a coarse hollow spray cone that can wet cylinder walls and create uneven combustion. A 4-hole or 6-hole nozzle splits the same fuel volume into multiple finer streams aimed at the intake valves, producing better atomization, faster vaporization, and more complete combustion. The result is measurable improvement in idle quality, throttle response, and very often fuel economy.
Why are Siemens injectors known for leaking on Dodge and Jeep?
The original Siemens Deka and equivalent single-pintle units used on the 1999–2010 Magnum 4.7L, HEMI 5.7L, and Jeep Grand Cherokee suffer from internal pintle wear and sealing-seat erosion at high mileage. The failure shows up as a strong fuel smell at idle, hard cold starts, and P0300 misfires. Our Bosch multi-hole upgrade fixes both the leak and the underlying atomization problem at the same time.
What warranty comes with these?
Aurus Lifetime Warranty on every unit. If you ever experience a flow-rate deviation, leak, electrical failure, or seal failure for the life of your vehicle, contact us with your order number for a no-questions replacement.
Will I see better fuel economy?
Most customers do, especially when replacing high-mileage stock injectors. Cleaner combustion means less unburned fuel in the exhaust and more usable energy per pulse. We do not promise a specific MPG figure — too many other variables (driving style, octane, condition) — but we have not seen a customer report a drop in economy after switching.
About Aurus Upgrade Tier Fuel Injectors
Aurus Upgraded Injectors sit between our OEM-direct replacement line and dedicated motorsport/racing parts. They are designed for owners who want their daily-driver, work truck, or weekend cruiser to run measurably better than it did with worn factory injectors — without the cost and complication of a custom tune.
Each unit is fully remanufactured in-house. Original cores are disassembled, ultrasonically cleaned, fitted with a Bosch multi-hole spray nozzle (typically a 4-hole or 6-hole pattern, selected to match the platform), pressure-tested for leak resistance, and flow-calibrated on a calibrated Bosch EPS 815 bench to within ±1% of the OEM flow rate. The result is a direct replacement that drops into the existing fuel rail with the original electrical connector and O-ring geometry.
Where a known OEM failure mode exists — for example, the leaking Siemens Deka injectors on the Dodge Magnum 4.7L and HEMI 5.7L, or the carbon-prone single-pintle designs on the 1.8T VAG platform — the upgrade also corrects the underlying problem. You get a smoother idle, faster cold starts, fewer P0300-family misfires, and very often a measurable improvement in fuel economy.
Every upgraded injector carries the full Aurus Lifetime Warranty. Free shipping on orders over $99 within the United States. Need help identifying the right upgrade for your application?