Hesco® Performance Parts    Factory engineered for optimum performance!

Hesco Performance Multi-Port Fuel Injection Kit for (258) 4.2L 6 Cylinder Engines

The Hesco Performance Jeep® electronic fuel injection kit is designed to enhance the efficiency and power of 1981 to 1990 Jeep 4.2L (258) inline 6 cylinder engines. The kit replaces the stock carburetor and manifold with a new multi-point injection (MPI) system. Each cylinder has its own injector, which precisely controls individual fuel requirements. The new MPI kit is self-compensating and runs equally as well from sea level to terrain above 12,000 feet. On and off-road performance gains can be expected. No more carburetor flooding problems when climbing steep hills or rock crawling. Mechanical components are based from production 1994 Jeep® parts; therefore replacements parts are readily available. Includes easy to read instructions. Not Recommended for engines with modified camshafts or increased compression ratios. MUST USE WITH VIBRATION DAMPERS LISTED BELOW. 

Multi-Port Injection System 1981-90 CJ & YJ 4.2 6 cylinder engine models with auto transmission only. $2100.00*

*Vibration damper must be purchased separately.

Multi-Port Injection System 1981-90 CJ & YJ 4.2 6 cylinder engine models with manual transmission only. $2100.00*

*Vibration damper must be purchased separately.

Jeep® 6 Cylinder Vibration Dampers for Multi-Port Injection System

A new vibration damper is required with Hesco 4.2L Jeep® MPI fuel injection kits. Select between standard V-belt and serpentine belt designs.

MPI Vibration Damper 1981-90 CJ & YJ Wrangler with 258 4.2L 6 cylinder engine serpentine belt drive water pump pulley. $159.95

MPI Vibration Damper 1981-90 CJ & YJ Wrangler with 258 4.2L 6 cylinder engine V belt drive water pump pulley. $166.95