- MADE IN THE USA and Includes Life Time Warranty to original buyer
- Thick walled Stainless Steel 1 1/4 Inch SCH40 Runners Fully Tig Welded/Back Purged
- Dual 38mm MV-S waste gate flanges
- True Twinscroll T4 Design
- Head Flange fits Rb20det, Rb25det, and Rb26dett Cylinder Heads!
Twin scroll merge collector creates a turbulent free area for the exhaust gasses to enter the turbine housing in even pulses at high velocities and low pressure drops. The result is an increase in turbine efficiency by 7-8 percent (faster spool, quicker response) and result in fuel efficiency improvements as high as 5 percent.