Product Weight: 5 lbs. Our 4Runner Axle Dump Exhaust is made with 3-inch diameter titanium tubing. The exhaust replaces the factory rear (axle back) section of the exhaust, providing extra clearance for off-road usage, as well as enhanced exhaust sound and 10-15 lbs. of weight savings. Our proprietary modular exhaust flange design allows this axle dump exhaust pipe to fit on 4Runner, GX550 and LC250. (The included exhaust flange spacer is for GX550 only.) This axle dump exhaust will increase the volume by about 5-10% on the 4Runner, while giving it a slightly deep tone. In our testings, the idle volume increased about 5 dB during idle, and 7 dB at the top end.