LS1 to LS3 Mass Air Flow Adapter Harness w/IAT — Manufacturer part number: 31-1015.

LS1 to LS3 (Card Style) Mass Air Flow Adapter Harness w/IAT. Commonly found on LS1 Camaros and Corvettes from 1997-2002) & LS3 Card Style MAF Sensors (Commonly found on 2010-2015 Camaro and Corvette)

Features include:

• Adapts LS1 (3 Wires) harness to LS3 MAF (Card Style)
• IAT harness
• 8" Harness
  

Note: Card style MAF sensors would be from the GEN 4 LS engines.

(Warning) This is a RACE ONLY product manufactured and sold for installation on vehicles to be used solely for competition purposes. Once this part is installed, the vehicle may never be used, or registered or licensed for use, on a public road or highway. If you install this part on your vehicle and use the vehicle on a public road or highway, you will violate the Clean Air Act 203(a)(3), 42 U.S.C, 7522(a)(3) and may be subject to personal civil or criminal liability.

Fitment and ordering

Confirm the vehicle, engine, dimensions and application restrictions listed above before ordering. Speed Engineering parts are designed to work with Speed Engineering components; mixing brands may require modifications.

Manufacturer specifications and availability checked October 4, 2026. Availability refers to the manufacturer and can change; it does not indicate stock held at Speedzone.