No it will not backfire. If it does for some reason, do the marble mod. All you have to do is take a dremel and cut the little spot weld on the 3 scews holding the chrome cap on. take taht off and drill 6 to 9- 1/2" holes. I did 9 on mine ( 3 in between each screw hole for the cap). Cut the tip back about a inch and half or so, so that it doesn't stick through the cap. Befor you put the cap back on, take the can off and drill 5- 1/2" holes on the inlet side. You'll need about a 18" long bit for this. When you look inside the can on the inlet side, you'll see the larger side to drill on. Reinstall can and put chrome caps back on. Don't for get to use some high temp loc tite on the cap screws so that they don't come out and you lose your cap. 1st page shows you how to drill the outlet side. If you have any questions about it, you can pm me and I'll do what I can to help you more.