2019-2025
2014-2018
2007-2013
1999-2006
Installation Time
(approx) 1 Hour
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
No guide available for this part yet.
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Fuel Injector Clinic High-Z Impedance Fuel Injectors; 1000cc (99-06 4.8L, 5.3L, 6.0L Sierra 1500)Find parts that fit my vehicle
Item S513360
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5 Reviews
Our Price
$746.76 set
Ship to: 60652
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Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features
- 1000cc Saturated/High-Impedance Ball and Seat Injectors
- Plug and Play ECU Data Available
- Includes Application-Specific O-Rings
- Comes with Solder-On Pigtails
- Sold in a Set of 8 Fuel Injectors
- Lifetime Limited Warranty
- Fits 1999-2006 4.8L, 5.3L, and 6.0L Chevrolet Silverado 1500 Models
Description
Utilizes the Latest Technology. This Fuel Injector Clinic Fuel Injector Set is specially designed to deliver the fuel that powerful truck engines crave and need. The set provides 1000cc per minute at the OE 58psi. Furthermore, it utilizes the latest technology to provide great linearity and reliable short pulse width control with great repeatability. These fuel injectors are great for high-power applications but also for its excellent driveability.
Flow Matched for Precision and High Performance. Fuel Injector Clinic extensively tests their fuel injector in sets and properly match them using Fuel Injector Clinic's proprietary Data Match Technology. Furthermore, each set is provided with the individual test results in the included Data Match Sheet.
Easy-to-Install. Each set is simple to install and comes with application-specific O-rings and solder-on pigtails. These wiring modifications are necessary as Fuel Injector Clinic uses new and unused injectors to ensure maximum performance and service life. Additionally, optional plug-and-play wiring harness adaptors are available for purchase.
Backed by Lifetime Limited Warranty. These fuel injectors are backed against manufacturing defects. Warranty only applies to the original purchaser and requires proof of purchase.
Application. This 1000cc per minute Fuel Injector Clinic Fuel Injector Set is specifically for use with 1999-2006 4.8L, 5.3L, and 6.0L Chevrolet Silverado 1500 models. Sold as a set of 8.
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Fitment:
- 1999 GMC Sierra 1500
- 2000 GMC Sierra 1500
- 2001 GMC Sierra 1500
- 2002 GMC Sierra 1500
- 2003 GMC Sierra 1500
- 2004 GMC Sierra 1500
- 2005 GMC Sierra 1500
- 2006 GMC Sierra 1500
Fuel Injector Clinic IS304-1000H
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (8) Saturated/High-Impedance Ball and Seat Injectors
4.8
Customer Reviews (5)
May 8, 2024
Review shared from Fuel Injector Clinic High-Z Impedance Fuel Injectors; 2150cc (07-13 V8 Sierra 1500)
2008 SLT - YahirY
GMC Sierra 2008 408 stroker ls
Great injectors! Works perfect in my 408 stroker turbo
Fit 5/5
Quality 5/5
Bang For Your Buck 5/5
Apr 10, 2019
Review shared from Fuel Injector Clinic High-Z Impedance Fuel Injectors; 2150cc (07-13 V8 Sierra 1500)
2009 SLE - Edward26
Installation Time: Afternoon
Injertors
Incredible results worth every cent truck runs quicker with less effort
Performance Gain 4/5
Fit 5/5
Bang For Your Buck 5/5
Jun 3, 2024
Review shared from Fuel Injector Clinic High-Z Impedance Fuel Injectors; 1000cc (07-13 V8 Silverado 1500)
2013 - Wesl
Installation Time: Afternoon
FIC 1000cc injectors
Solid quality flow matched injectors that come with all the injector data needed to scale in your tune file with HP Tuners.
Fit 5/5
Quality 5/5
Bang For Your Buck 4/5
May 26, 2022
Review shared from Fuel Injector Clinic High-Z Impedance Fuel Injectors; 525cc (99-06 4.8L, 5.3L, 6.0L Sierra 1500)
MichaelR272827
Installation Time: Afternoon
Problem Solver
Originally bought ebay refurbished injectors that did not hold up. These were easy to install, and corrected the truck misfire issues. Also make sure you get the wiring conversion kit as it will save time.
Fit 4/5
Quality 5/5
Bang For Your Buck 5/5
May 14, 2020
Review shared from Fuel Injector Clinic High-Z Impedance Fuel Injectors; 525cc (07-13 V8 Silverado 1500)
2007 - Mendoza85
Installation Time: Less than 1 Hour
Fuel Injector Clinic Fuel Injectors;
Great fuel injectors. This is my second pair for my build. Easy to install.
Performance Gain 5/5
Fit 5/5
Bang For Your Buck 4/5
Reviews of Fuel Injector Clinic Engine products have an average rating of 4.8 out of 5
May 8, 2024
Review shared from Fuel Injector Clinic High-Z Impedance Fuel Injectors; 2150cc (07-13 V8 Sierra 1500)
2008 SLT - YahirY
GMC Sierra 2008 408 stroker ls
Great injectors! Works perfect in my 408 stroker turbo
Apr 10, 2019
Review shared from Fuel Injector Clinic High-Z Impedance Fuel Injectors; 2150cc (07-13 V8 Sierra 1500)
2009 SLE - Edward26
Injertors
Incredible results worth every cent truck runs quicker with less effort
Feb 21, 2025
Review shared from Fuel Injector Clinic High Impedance Fuel Injectors; 525cc (99-03 F-150 Lightning; 04-17 V8 F-150)
2006 STX - Thissux4real
FIC Injectors
Awesome product. Easy to install and can notice a huge improvement on performance.
Jun 3, 2024
Review shared from Fuel Injector Clinic High-Z Impedance Fuel Injectors; 1000cc (07-13 V8 Silverado 1500)
2013 - Wesl
FIC 1000cc injectors
Solid quality flow matched injectors that come with all the injector data needed to scale in your tune file with HP Tuners.
May 26, 2022
Review shared from Fuel Injector Clinic High-Z Impedance Fuel Injectors; 525cc (99-06 4.8L, 5.3L, 6.0L Sierra 1500)
MichaelR272827
Problem Solver
Originally bought ebay refurbished injectors that did not hold up. These were easy to install, and corrected the truck misfire issues. Also make sure you get the wiring conversion kit as it will save time.
Jan 29, 2022
Review shared from Fuel Injector Clinic High Impedance Fuel Injectors; 650cc (99-03 F-150 Lightning; 04-17 V8 F-150)
2016 XLT - JuliusG
Difference You’ll Feel!
Install took me about an hour because the fuel rail refused to come out despite all bolts being out and I didn’t want to rip out my fuel rails damaging them. Eventually I was able to get them out (with all O-Rings) and combined the 650cc fuel injectors with a custom 5 star tune to go with other parts I ordered and now my truck is basically moving like a rocket! Expensive but worth the price
Aug 25, 2021
Review shared from Fuel Injector Clinic High Impedance Fuel Injectors; 525cc (97-03 V8 F-150, Excluding Lightning)
2003 Harley-Davidson Edition - Angel69
Worth the money!!!
It’s a bit expensive but worth the power you can get out of them!!
May 14, 2020
Review shared from Fuel Injector Clinic High-Z Impedance Fuel Injectors; 525cc (07-13 V8 Silverado 1500)
2007 - Mendoza85
Fuel Injector Clinic Fuel Injectors;
Great fuel injectors. This is my second pair for my build. Easy to install.
Aug 22, 2018
Review shared from Fuel Injector Clinic High Impedance Fuel Injectors; 1000cc (99-03 F-150 Lightning; 04-17 V8 F-150)
2015 - Spencer
Expensive but worth it
I absolutely love these, they decreased my mpg, but I’m getting crazy power!
Mar 25, 2018
Review shared from Fuel Injector Clinic High Impedance Fuel Injectors; 1650cc (99-03 F-150 Lightning; 04-17 V8 F-150)
2010 XL - AjF
Great product
This is a great product that is great for any f-150
Questions & Answers
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Will It Fit My Sierra 1500
- 4.8L V8 - 99, 00, 01, 02, 03, 04, 05, 06
- 5.3L V8 - 99, 00, 01, 02, 03, 04, 05, 06
- 6.0L V8 - 01, 02, 03, 04, 05, 06
