Summit 15 buck ones i lived with them on my 265 wagon and they got louder in about 1 year.But they also rusted out pretty bad . Mount them as far to the rear as possable like in my wagon.
I had them on my truck 1 day.Getting older with 50% hearing loss and they drove me nuts.
Funny thing i sold them at the swap meet for 20 bucks each LOL Made money on a mistake for one time in my life!
Looked at flowmaster didnt want the truck to sound like the kids 5.0 next door. I really do like the newport mufflers. Found those by luck.
Everbody is diff,you may just like em. Run full tailpipes and run the mufflers all the way back next to the rear.