K-Tuned Throttle Body Velocity Coupler (Civic Si to 3.5") - KTD-TVC-6035 9.5" Width our 3" Stainless Steel Dual

our 3" Stainless Steel Dual Tip Cat-Back for the Ford Focus ST is a direct replacement cat-back exhaust that boasts full 304 stainless steel construction

the 4152 is fully fuel/oil compatible

NS3-XTG4 kit features an Xtreme pressure plate for the most demanding driver

5 PSI (-1 to 3 BAR) / 7

Largest Gains* +17

K-Tuned Throttle Body Velocity Coupler (Civic Si to 3.5") - KTD-TVC-6035 9.5" Width our 3" Stainless Steel DualThe K Tuned velocity coupler is made from reinforced 4 ply silicone. This unique part completely removes the step commonly found at the throttle body opening, which straightens and accelerates the intake airflow and in turn helps the engine breathe easier. Intake system design and overall airflow into an engine can be critical to making maximum power. The coupler has been engineered to improve an engines volumetric efficiency similar to the way a