Features: Heat Resistant Design Featuring a construction that maintains its strength at high temperatures, this 4 resonator ensures long-term durability. This heat-resistant design extends the life of the muffler Noise Reduction You'll delight in quieter, smoother drives thanks to this exhaust resonator's impressive noise reduction capabilities. It effectively eliminates buzzing and reduces exhaust noise to deliver a more peaceful and pleasant driving environment. Indulge in quieter rides with this 4 resonator Specifications: Material: 304 Stainless Steel Size: inlet ID 4", outlet ID 4", overall length 30", round body width 7" Package includes: 2 pcs x 4" Exhaust Resonator Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.