I used 3 " marine exhaust to replace my upper boots , they fit like a glove & cost me about $12.50 to but a 1ft long peice , they need to be 4 1/2 " long each
as for the lowers I'll be workin on a mod. to go from the 3" - 3 1/2 " just give me some time

side note ; i did this cuz my A/C line had a hole in it from rubbing against the boot which also had a hole , if you don't have a hole in your A/C line yet do some P/M now to avoid the major head ache

G/L Brian

drop a note me about what you think of this