JEGS Flash Sale
Call Our Support Line
24 Hours / 7 Days a Week!  
Same Day Shipping Before 11 PM ET
My Cart
Shop By Vehicle
Shop By
Close Menu
Shop By Vehicle
Top Categories
All Categories

All Categories

Free Catalog
E-Mail Signup
My Account
Track Order
Gift Certificates

FAST 30397-8

Precision-Flow High-Impedance Fuel Injector GM LS3, L99, L76, LS7

FAST 30397-8


made in usa
jegs shipping
FREE Shipping
Easy Returns
Easy Returns
Lowest Price Guarantee
Lowest Price Guarantee
FAST 30397-8 Precision-Flow High-Impedance Fuel Injector GM LS3, L99, L76, LS7 $259.99
Precision-Flow High-Impedance Fuel Injector
  • GM LS3, L99, L76, LS7
  • 39 lbs/hr
  • 1/pkg

  • Specifications:

    Wiring Harness Included
    Fuel Rail O-Ring Outside Diameter (in.)
    Injector Advertised Flow Rate
    Injector Advertised Flow Rate (lbs./hr.)
    Injector Plug Style
    Manifold O-Ring Outside Diameter (in.)
    O-Rings Included
    Sold as a set of 8
    Seat to Seat Height (in.)
    Manufacturer's Part Number:

    FAST's Precision-Flow High-Impedance Fuel Injectors for GM Gen IV engines are uniquely designed for direct installation into LS applications. They deliver the outstanding idle quality and flow consistency essential for high-performance EFI engines. These fuel injectors yield faster throttle response, reduced clogging, and superior fuel atomization. They are properly sized and utilize the correct EV6/USCAR connector for hassle-free, plug-in operation.

  • Sold each and in sets of 4, 6, or 8
  • Direct installation into LS applications
  • Designed for a perfect fit in FAST's EZ-EFI 4150 Throttle Body
  • Quicker throttle response, less clogging, and superior fuel atomization

  • I'm doing an engine swap on my 2004 Chevy Tahoe Z71 4wd. I'm going from a 5.3L to 6.0L with 450hp . I would like to use my OE harnesses and fule rail. Would these injectors work and are they enough LB ? Thanks for your time and help.

    Asked by: G VELEZ 79
    The injectors flow rate will work for your application, but you will need to check the your intake and fuel rail will fit the 6.0L engine has a different style manifold.
    Answered by: Rusty B
    Date published: 2017-10-13

    Are these able to fit a 2013 GMC Sierra 5.3L with Flex Fuel? And will I gain much power?

    Asked by: Urby4699
    These should work for your application. They do not make more HP by themselves, they just do a better job of regulating fuel flow and that can lead to more HP.
    Answered by: Rusty B
    Date published: 2017-10-06

    Will these work with 2003 LQ4 6.0?

    Asked by: CharlieG
    As long as the ECU is able to drive this set of injectors.
    Answered by: Rusty B
    Date published: 2017-09-19
    • y_2017, m_10, d_20, h_21CST
    • bvseo_bulk, prod_bvqa, vn_bulk_2.0.3
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_3
    • loc_en_US, sid_10001_10001_1399566, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs

    Before you leave us... Receive a free catalog or join our email list

    Sign up to receive our catalog or subscribe to our email list now to see our exclusive email only specials, new products, and offers!

    Request CatalogJoin Email List