Instant Rebates
800.345.4545
Call Our Support Line
24 Hours / 7 Days a Week!  
FREE SHIPPING!
Same Day Shipping Before 11 PM ET
0
My Cart
0
$0.00
Shop By Vehicle
Shop By
Category
Close Menu
Shop By Vehicle
Top Categories
All Categories

All Categories


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

JMS 4001GM4

Digital Mass Air Modifier GM LS1 Vehicles Using LS3 Sensor

JMS 4001GM4

227-4001GM4

made in usa
jegs shipping
FREE Shipping
Ships from Manufacturer
Easy Returns
Easy Returns
Lowest Price Guarantee
Lowest Price Guarantee
JMS 4001GM4 Digital Mass Air Modifier GM LS1 Vehicles Using LS3 Sensor $449.00
Digital Mass Air Modifier
  • GM LS1 Vehicles Using LS3 Sensor
  • 3.75" x 2.5" x 2.375"

  • Specifications:

    Manufacturer's Part Number:
    4001GM4

    Accurately Scale and Filter Your Mass Air Signal

    The JMS Mass Air Modifier is the ONLY device capable of filtering AND scaling the mass air signal in your car. By filtering the mass air signal in your vehicle, the idling and cruising performance of your engine will greatly improve. All modifications can be performed with the included screwdriver by adjusting the knobs and switches on the face of the device, without any need to connect to a computer! The Mass Air Modifier is available in digital and analog signal versions, allowing you to choose the proper device for your newer or older vehicles. Installation kit included.

    Features
  • Easy to Set-Up and Use
  • Digital and Analog Versions Available
  • Fully Adjustable without the Need for a Computer
  • Filters and Cleans Mass Air Signal
  • Adjustable Filter Window: Idle or Cruise
  • Learns the Unique Idle of your Application
  • Scales Mass Air Signal to a Fine Tune for Additional Power
  • Plug-and-Play Wiring Harness
  • Works with Both 12V and 16V Battery Systems
  • Compliant with All Stock and Aftermarket Mass Air Sensors
  • 34-Page Instruction Manual Included

    NOTE: Not legal for sale or use in California or on pollution-controlled vehicles

  • Does JMS 4001GM4 fit your vehicle?

    Narrow Results

    1998-2002 PONTIAC FIREBIRD

    • Liter: 5.7
    • SubModel: TRANS AM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1997-2004 CHEVROLET CORVETTE

    • EngineType: ALL
    • SubModel: ALL

    1998 CHEVROLET CAMARO

    • EngineType: ALL
    • SubModel: LUJO

    1998-2002 CHEVROLET CAMARO

    • CC: 3800
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    2004 PONTIAC GTO

    • EngineType: ALL
    • SubModel: ALL

    1998-2002 PONTIAC FIREBIRD

    • Liter: 5.7
    • SubModel: FORMULA
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1998-2002 CHEVROLET CAMARO

    • Liter: 5.7
    • SubModel: Z28
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1998-2002 PONTIAC FIREBIRD

    • CC: 3800
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1998-2002 CHEVROLET CAMARO

    • Liter: 5.7
    • SubModel: Z28 SS
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    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