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2008 STS Northstar RWD, 2000 Trans Am WS6 6 spd, 1968 LeMans convertible 6.6
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Yeah that's what they all say.. probably because back then there was no upgrades for the 4.6 and only a cold air intake for the 3.6, but after installing you have to pull your ecu chip and disconnect the battery or you will throw codes and you will never show any gains, the computer has to relearn 1st, but I went from stock 320 horse and 15.3 miles per gallon around town, to 369 horse and 17.8 per mile..with all three upgrades..my friend has a 2006 5.7 charger RT.. all he sees is my tail lights..so in my opinion it's worth it..but that's just me
Ummm if it were that easy, the Cadillac engineers would have done this. I call BS on your gains. Especially the MPG improvements.
 
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