I want to do something different with my exhaust. I want to make it louder, but with the least amount of drone, so here are the 2 options that I have come up with.

1. Leave all the cats on the truck and just cut my IMCO muffler out and install an SLP Loudmouth.
2. Cut the rear 2 cats off and replace with pipe, and then leave my IMCO muffler in place.

Which one do you think would be louder? Also which one do you think would have the least amount of drone when cruising at 60-65mph?

 

I would do the SLP before cutting the cats. The SLP is loud, but it sounded good. Some stuff is just loud or so loud it doesn't sound good.

 

My gearhead friend has the SLP "bullets" on his Mustang GT,its plenty loud,especially when he mashes his right foot to the floor.He removed all 4 of his cats and installed the mil eliminators.you might want to try that if you want loud.Good luck with your mufflers.