Had my jb4 on for a month now and it's just been awesome. Recently install an analog boost gauge along with a off brand pipe with a bov and it sounds great, but I want to change my spark plugs out for a step cooler to help with the increase of boost. 1st and second I hit 18-19psi no problem, but 3rd and 4th I'm hitting around 23-24 psi on a slightly tweaked map I've made. I know jb4 is working on boost for gears but they don't have any release on that yet so in the mean time id like to not blow a hole in my piston lol. Has anyone found a cooler plug for the 1.4 yet?
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