Here's all the information about my Kolak Ignition Upgrade for your 5.9 - JeepForum members get 10% off the price below:
My recommendations for the 5.2/5.9 ZJ ignition system are designed to improve idle quality and throttle response, and to improve and maximize current transfer. This really helps support other modifications. Here's what I recommend:
Magnecor KV85 ignition wires
MSD high output replacement coil
Coil adapter pigtail harness for '98 Jeep
Heavy duty US made brass terminal distributor cap with rotor
Autolite platinum plugs (one heat range colder than stock)
Price for the kit is $270.00
Please take some time to read the information about plug wires on Magnecor's web site at www.magnecor.com
. Their wires are the finest I've found - incredibly flexible due to their pure silicone construction, and almost impossible to scorch or burn. Magnecor makes wires for many of the NASCAR teams, and their current transfer capability is amazing.
The MSD high output coil has fully 1/3 more output than the factory coil, and this really works well with the Magnecor wires. It's a direct replacement, and is easy to install. With the coil and wires, you can open up the plug gaps an additional .005 for a bigger spark. The colder plugs provide better detonation resistance.