Lost to a NA SRT8 Jeep today... Unacceptable.
I have ignored the 2 nagging "not now issues long enough."
1- what gap is everyone running the M-12405-35T at? There default ..029 .. but they feel and log at lower spark levels than the sp542's. ... I feel they should be .027 at most with that tiny tip..
And what mufflers do I need .. the OEM replacements suck. Hard. They killing me and the noise they make is awful
Thoughts?