1993-1998 Jeep Grand Cherokee ZJ Throttle Body Spacers

The ZJ's 4.0L and 5.2L both respond to airflow improvements before the charge reaches the intake runners, and a throttle body spacer is the lowest-commitment entry point into that improvement without touching the ECU or the intake manifold itself. That is the lane that 1993-1998 Jeep Grand Cherokee ZJ Throttle Body Spacers occupy — a bolt-in addition that increases air mixing distance and adds a thermal barrier between the hot throttle body and the manifold.

 

Phenolic material is the preferred spacer construction on the ZJ specifically because of its insulating properties — it reduces the heat soak from the throttle body that raises intake air temperature on a platform where underhood temperatures are already elevated from decades of use. The improvement is most noticeable at low-to-mid throttle in the RPM range the ZJ uses in daily driving, which is exactly where a comfortable driving experience is defined.

 

The intake improvement that bolts in without a tune or any wiring work is a set of 1993-1998 Jeep Grand Cherokee ZJ Throttle Body Spacers. The full ZJ engine performance category is at 1993-1998 Jeep Grand Cherokee ZJ Engine Performance Parts, cold air intake options are at 1993-1998 Jeep Grand Cherokee ZJ Cold Air Intakes & Air Filters, and supercharger kit options for owners going further are at 1993-1998 Jeep Grand Cherokee ZJ Supercharger Kits.