Process West Silicone Throttle Coupler - All Subaru 2013-bmw-135is-esi9418066 COBB Aggressive maps decrease upshift

COBB Aggressive maps decrease upshift and downshift time

Toyota A90 Supra B48/B58

Viscosity: 0W-40

factory-like

leaving the mid-muffler as the only filter

Process West Silicone Throttle Coupler - All Subaru 2013-bmw-135is-esi9418066 COBB Aggressive maps decrease upshiftThe Process West silicone throttle coupler is a direct replacement for the factory joiner between the top mount intercooler and throttle body, built to a higher standard than the part it replaces. With a thicker wall and stronger silicone compound, it offers better durability and resistance to heat and boost pressure over the long term. A straightforward upgrade for one of the most stressed connections in the intake system.