I am getting some bad very loud back fire on deceleration!
I have after market pipes.
I have a stock air cleaner.
I do not have a power commander.
( Well I did .. I removed it to test both have back fire. )
I replaced the two exhaust gaskets.
I used the "marble" Trick at the air cleaner- NO help.
I removed the entire EPA system.
Blocked the two air intakes at the heads with rubber stoppers.
I really like to use the gears for deceleration !
Instead of the brakes ! But Get WAY to much back fire to do that!