Fireman591
Full Access Member
Well I finally pulled the trigger on my 5.3 2021 Tahoe for a muffler upgrade. I cut out the stock BBQ grill sized muffler and welded in a 18 inch MagnaFlow Performance Muffler model 12259. I left the flapper and resonator. The sound is just a tad louder but the sound is much deeper than the stock muffler. Overall I am happy with the upgrade. The muffler was $141 on Amazon and I paid $100 for the install.
