my 79 ford 302 is runnin p. hornies with 2 1/2" short pipes that dump right before the rear tires....pretty loud dude and thats with a fairly low compression ratio...but then again i live in the n. georgia hills so it dont much matter
If you live in the city or are runnin hi compression you might wanna think about a more muffling muffler...those noise violations will add up....