Greddy will be coming out with a new line of cat-back systems for our cars and others as well. Pre-Orders can be placed. The cat-back system will feature a stainless steel canister with a Titanium tip that is designed after their PEII line of exhausts. The cat-back also features a stainless steel resonator and stainless steel piping. Depending on which car, piping ranges from 50-80mm diameter and tips range from 102-115mm diameter.