Hemilife1877
Junior Member
Flowmaster only offers for 2018 2500 tradesman with 6.4 from what i can see a Cat back kit for around $900 in Dual or else some slight mods will need to be done unless you just do a single 50 HD series with standard 3.5 pipe only because flowmaster dosint sell 3.5 single to dual sized 50hd already for this truck
This is what i did with a muffler shop i have used for years with previous flowmaster installs.
Put a 50 HD series flowmaster
https://www.flowmastermufflers.com/keywords-search-results/?keywords=9530572
that has a 3.0 in and dual 2.5 out he used a 3.5 to 3.0 reducer to connect to stock 3.5 pipe to Flowmaster since this is the only single handed FM series you can get without buying $900 kit for 6.4 hemi with the right 3.5 holes so in essence we just took the stalk 3.5 single pipe in and has dual 2.5 out which will not restrict the needed airflow thus loosing power.
I noticed a power increase and i went from 15.4 mpg to 19.6 mpg city running same rout to work everyday, keep in mind though i also installed a K&N CAI a few days before hand. I haven't had a chance to haul my 31 ft travel trailer yet so not sure on towing yet only put 1600 miles on truck so far. Its got a nice growl to it now and not getting the over kill drone sound in cab either.
This is what i did with a muffler shop i have used for years with previous flowmaster installs.
Put a 50 HD series flowmaster
https://www.flowmastermufflers.com/keywords-search-results/?keywords=9530572
that has a 3.0 in and dual 2.5 out he used a 3.5 to 3.0 reducer to connect to stock 3.5 pipe to Flowmaster since this is the only single handed FM series you can get without buying $900 kit for 6.4 hemi with the right 3.5 holes so in essence we just took the stalk 3.5 single pipe in and has dual 2.5 out which will not restrict the needed airflow thus loosing power.
I noticed a power increase and i went from 15.4 mpg to 19.6 mpg city running same rout to work everyday, keep in mind though i also installed a K&N CAI a few days before hand. I haven't had a chance to haul my 31 ft travel trailer yet so not sure on towing yet only put 1600 miles on truck so far. Its got a nice growl to it now and not getting the over kill drone sound in cab either.
