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Log I

2026-10-05

2025 Toyota GR-FOUR Yaris (AT) Downpipe Modification

From Welded to One-Piece Casting:
We redesigned the TY-GRCY06DP from a welded construction into a one-piece cast design, creating a smoother internal flow path and dramatically improving overall airflow efficiency.

Today's Finding:
During today’s fitment test, we discovered that a new mounting bracket is required for proper installation.

Next Step:
We’ll test whether a single bracket design can work across both MT and AT applications.