It's always exciting when a friend or family member gets a new Mopar muscle machine. When my brother Andy told me he was ordering a new 2015 Scat Pack Shaker Challenger with the 485-horse 392 Hemi, I ...
On a 5.7 HEMI, shorty headers promise easy bolt-on power without turning your daily driver into a race-only project. The real question is how much horsepower they actually add compared with stock ...
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