I wish I would have installed a 2.5" dual on my truck.

I did a dual on my '89 F150 where I cut before the first cat(where the 2 pipes go in) built back from there with 2.25" pipe into 2 flowmaster classic 40 series mufflers with dumps just before the rear axle.

Wish I would have gone with 2.5" pipes and mufflers... it's a little too crackly and raspy for my liking.

I'll try to get pictures and soundclips for you folks next weekend, but I have to try to get my hands on a digital personal sound recorder first and go from there

 

Run it out to rear and put some BIG tips on it. It might help some with the crackle/rasp.

 

Put some 18x3.5 chrome or stainless steel tips on it..It will look nice and sound better.