How to make my v6 4.0 2007 mustang faster ?
first, you can't it's a ford. lmao. hahaha Yeah, it's an automatic, why try? they have the worst top end ever, and why not just buy an old mustang that's a v8, I mean come on, then you could drop a 351w in it, (if ur a ford guy that is) I'd drop a 454 in it myself, but that's just me lol anyway, just try with small stuff, cuz that's all you're gunna be able to do to a 4.0. port and polish, balance, but then again, why waste the money on that if you're not guna put a turbo on it. try a cold air intake, or cool air, that gives you like what, 10 or less hp? I mean, there's not much you can do without extreme modifications, which you have to reprogram your computer, or chip it up, which is kinda stupid in my opinion, when you could just go carburation which is better for racing, then you could get a blower. lol