When I was building my Rampage I was weight conscious
to a extent.. I was shooting for 2800# race ready with
me in it.. but this is also a street rod so the exhaust
was important to me... I wanted the right note and the
right DB level.. so I put the muffs all the way to the
back bumper with 3" all the way... it ended up being 2920#
with me and 18 gals of fuel(on the 2800# I forgot the fuel
weight so I would have been about 20# off of my calculations)
but it is what it is with a full interior and trailer hitch..
if the 3.5" stuff is that heavy that is some THICK wall stuff