It says "New from SLP, this system fuses the superior performance of our infamous "Loud Mouth" cat-back with a deeper, mellower exhaust tone. Built entirelt from top-quality 304 stainless steel, it features 2.5" mandrell bent tubing, ultra-low restriction SLP mufflers, and a pair of hand-polished, double-wall tips." Fits 99-04 GT and Mach1