X-Pipe transitions are available in 2.25" to 3" inlet/outlet diameters and can be found in many of our cat-back systems, or sold individually for those looking to complete their one-off system. H-Pipe transitions are available in 2.25" to 2.5" inlet/outlet diameters. MagnaFlow’s clamp-on H-Pipes create power gain in low-end and mid-range torque. The H-Pipe is recommended for those seeking that classic deep American muscle sound on their vehicle. Tru-X Pipe Transitions are great for dual/dual and balance tube applications. MagnaFlow’s Stainless Steel Tru-X Crossover Pipes have a gentler radius that allows for efficient exhaust gas scavenging, noise cancellation and better balance between cylinder banks. The result is a significant increase in power and torque but a reduction in decibel sound levels; the best of both worlds.