I ordered the same plugs, but after further research, I refused the shipment and ordered LZTR6AIX-13. The LZTR6AIX-13, runs colder than the LZTR5AIX-13. If you plan future high performance mods (upgrade turbo, boost controller, stage 2, etc.), you should go with LZTR6AIX-13, otherwise, what you order should be sufficient. I also read on NGK's website that it's better to run a colder plug than one that will run too hot. With a plug that is run too hot, there is a possibility of engine damage. Too cold would lead to fouled plug(s)
Also, I spoke to a tech. They recommend not to change the gap on the NGKs.
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<b>\'04 PT GT Graphite Metalic w/Autostick: </b> Stage1, BTG Strut Tower Brace, Eibach Anti-Sway Bars, Airaid CAI, Mopar 2.5\" Dual Cat-Back (D: 14.48@93 - A/S: 14.56@90) <i>...more mods at CarDomain or PTCruiserWorld</i>
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