My exhaust is about to fall off, and i know that there are several legal ramifications and some mechanical ones. I'm an old Chevy V8 guy & they will run just fine no matter what you put on even straight pipes which are deafening. I used to run Cherry bombs on my V8 Chevy's, but can i do this with a Nissan V6. Is there enough back pressur. By Cherry Bombs, I mean that when you pick up the muffler & look through it there are NO RESTRICTIONS OR BAFFLES WHAT SO EVER! You can see right through. The muffler is simply an expansion chamber usually filled with fiberglass insulation, which does a great job of muffling the sound unless you put your foot to the floor & then she gets REAL LOUD!! So can I use these on my V6 without causing any damage, like burning out the valves? Surleyone