Cherrybomb glasspack 5.3 horsepower

[Deerassassin]

I have an 03 5.3 stock will I lose horsepower with it. I have a thrush muffler on right now. I want something deeper and louder.

 

[kymeallion]

Long glass packs or cherry bombs should do the trick. Also, if you want real deep put some mega phone tips on it. the longer the deaper the tone. I had a truck @ 1 time that i did all that & it had a real deep tone, almost deaper than most sub woffers. The tips were 3 1/2'' in dia & 24" long with a slant cut on one end. I don't know who makes them but advanced auto can speacial order them & they come in 3 or 4 different length

 

[Molson02536]

I have an 03 5.3 stock will I lose horsepower with it. I have a thrush muffler on right now. I want something deeper and louder.

If your looking for loud and deep sound, install http://www.flowmastermufflers.com/index.php?page=114. There loud and there is noway your not going to be not noticed anywhere with them on your Sierra.

Good luck and keep us posted.