is there really no more tune up to P71's? besides plugs, fluid change, and cleaning the MAF, is there any thing else to do???

and what plugs are we using now?
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07 P71,09 P71,05 P71, 99 P71, 06 P71 totaled! sold my first 4 P71's
http://www.supermotors.net/vehicles/registry/media/570548_1