Stainless Steel Mandrel Bent Pipe Includes Silicone Coupler to turbo 2x Stainless steel T-Bolt Clamps Flows over 20% more than stock Weight: 3.5lbs
Design 1 - To make the whole pipe 2.5" and use a straight silicone reducer to make the
2 - To make the first part of the pipe 2" and then have the pipe expand up to 2.5" with a smooth cone welded into the pipe.
Design 1 - This is the design of the old ETS Lower Pipe and some others. In this design the whole pipe is 2.5" and the bend up to the turbo is 2.5". Once the pipe makes the bend up to the turbo outlet, a silicone reducer handles the transition from 2.5" to 1.8". This design worked very well, but we always wondered if the abrupt area change of the 1.8" to 2.5" reducer was too much to fast, and was slowing the air too fast, and causing
2 - This is the other main design of lower pipes on the Evo market today. In this design, the theory is to make a very smooth transition from the small 1.8" turbo outlet to the 2.5" intercooler inlet.
This type of pipe starts at 2.5" at the intercooler end, then a cone reducer is placed between the 2" and 2.5" section for a smooth change in area. from here, the pipe makes it's bend in 2" diameter up to the turbo outlet, where a 2" silicone is clamped down to 1.8" This design gives a nice gradual area change, but it forces all of the airflow coming out of the turbo to flow through a 2" 70deg bend.
This is where we feel the restriction lies in this design. We feel that 350whp+ worth of air has no business being in a 2" pipe for any amount of time, much less bending through 70deg.
Stock Pipe - Avg. peak power 401.55hp Competitors - Avg. peak power 405.69hp ETS LP2 - Avg. peak power 410.74hp