Check the listing for details. Extension Harness for Holley EFI J1B P1B - Various Lengths. Condition: New. Listed at 79.99 USD. EBAY STORE HOME BUSINESS HOURS MON-FRI 9AM-4PM EST TERMINALS CONNECTOR KITS CONNECTOR PIGTAILS WIRE HARNESSES AUTOMOTIVE TXL WIRE Extension Harness for Holley EFI J1B P1B - Various Lengths EXTENSION HARNESS FOR 26 PIN HOLLEY J1B (P1B) J1B, also referred to as P1B, is the 26 pin ECU connector on all Holley EFI main engine harnesses. Extend the length of your Holley EFI engine wire harness by using an EFI Conversions extension harness. Choose from 1ft to 5ft extension harnesses for 26 pin Holley EFI J1B (P1B) ECU connection. CONSTRUCTION QUALITY Assembled by EFI Connection LLC in Erie, PA OE Style Connectors Precision Machined Crimping Dies for Manufacturer Spec Crimps Automotive TXL Wire Assembled Using Maximum Wire Size (16 AWG Outer Cavities and 18 AWG Inner Cavities) TERMINALS CONNECTOR KITS CONNECTOR PIGTAILS WIRE HARNESSES AUTOMOTIVE TXL WIRE