T tommaso New member Aug 21, 2009 #1 Hello, if I buy the new Challenger, the high end one producing in the low 400's horsepower, and i add long tube headers, a good after market exhaust, and a good cold air intake how much horsepower and I looking at?
Hello, if I buy the new Challenger, the high end one producing in the low 400's horsepower, and i add long tube headers, a good after market exhaust, and a good cold air intake how much horsepower and I looking at?
