MagnaFlow Y-pipe transitions are designed for single-pipe exhaust systems that have dual inlet pipes. MagnaFlow's stainless steel stamped Y-pipes represent a significant leap forward in technology over traditional pipes. The gentler radius allows for better exhaust gas scavenging, noise cancellation, and balance between cylinder banks. The result is a significant increase in power and torque with the use of these MagnaFlow stamped Y-pipes.If you have a Hemi Ram or Hemi Durango, then this mod is for you. The factory Y-pipe is crushed and very restrictive. Open up your exhaust and free up some lost HP with this replacement Y-pipe.Material: 100% Stainless SteelInlet/Oulet Size: 2.5in. Dual/3in. SingleOverall Length: 10in.