Looking to put a muffler on a 5.3 2008 silverado. Leaning towards a flowmaster 40. Is it worth waiting to put a full cat back as far as sound goes? Local shop will put a 40 on for 140. Any other way to go? Straight pipe to loud?
Had Magnaflow dumped on my 07 5.3. Sounded much cleaner and smoother than the flow master. Not quite as loud but idled much better too.