One of the things people dislike is even with a good tune the Stillen kit falls below the GTM kit in HP and TQ, mainly TQ.
Also, all who try to reach 500whp stop and switch kits, the stillen kit just seems limited in its expand ability.
I have known a few owners and they like it for what it is and the power it provides. With a good tune and supporting mods it can be a solid kit, just limited versus other options.
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