A few years ago, a mechanic cut off my stock muffler and replaced it with straight pipe... he said it would increase mpg. While I’ve passed safety inspections since then, this year my truck failed for not having a muffler. L I am looking at buying the Magnaflow XL Turbo. It seems like a simple job to install one, and all that would be needed is a measuring tape, hacksaw and a couple U-bolts. Would I be totally crazy to attempt this myself? Any advice? Thanks.