Complete SS exhaust systems seems to be out of the market. Are there any muffler-only upgrades (louder) that bolt to the stock SS system? No cutting, fabbed pipes, etc. I'm looking at FlowMaster mufflers #42442 and #52458. Thanks.
First know that the stock muffler is welded to the intermediate pipe from the factory, so cutting is involved.
The over the axle pipe is clamped to the muffler outlet.
I bought the Walker stock replacement mufflers and adapted them to the end of the intermediate pipe after I cut the stock muffler off. I kept the factory intermediate pipe because it is a type of stainless steel and I am still using it after 20 years .
This is on my 96 B4U Caprice which has the same exhaust as the Impala SS.
Put a pair of original 40 series flowmasters #42443 on my ss about a week ago. Definitely louder than the stock mufflers, but not anywhere near loud enough to wake the neighbors. A low grumble at idle and a mild roar at WOT.