1320 Performance R-series  bottle style resonators are round bodied, densely packed with our premium multi-layered sound absorption materials, and manufactured from 304 stainless steel and tig welded for optimum durability and corrosion resistance. 1320 Performance R-series bottle style resonators have a sleek design that is optimal for easy installation and work to maximize the reduction of exhaust db levels. 

check the pictures for the quality of our R-Series line resonator muffler we use and test every thing we manufacture.