Borla 1.23 x 8.5 x 5.5 x 4 XR-1 Multi-Core Racing Muffler

This is the Borla XR-1 Multi-Core racing muffler, designed for applications where maximum exhaust flow and durability are key. It's built with T-304 stainless steel, which means it won't rust and is well-suited for high-horsepower setups and demanding track use. The universal, reversible design offers flexibility during installation, making it a solid option for full-bodied cars or other vehicles needing an efficient exhaust path.

Borla's patented Multicore technology is at the heart of this muffler, allowing exhaust gases to flow through multiple internal channels. In testing, this design actually outflows a straight piece of pipe, which is pretty notable for a muffler. The construction is 100% welded for strength, and it uses sound-absorbing stainless steel wool packing to manage sound and prevent burnout over time. This combination aims to provide a good balance of power and sound control for racing applications.