HKS introduces a new exhaust junction pipe that fits between the primary and secondary catalytic converters. Even in the factory exhaust system, the stock D54 pipe is a bottleneck. HKS pipe size is enlarged to D60, which enhances exhaust efficiency and works well with bolt-on turbo kits. The stock D54 pipe was purposefully damaged in many locations to avoid conflict with other vehicle components (see photo). HKS joint pipe, on the other hand, is D60 and was manufactured in a configuration without these dents. The larger bend radius than the standard reduces exhaust pressure while increasing power.
NOTE
It is necessary to lift the engine for pipe replacement
