The Spectre Performance Coupler Reducer was a major disappointment for my automotive needs .Based on my experience the product did not deliver the expected PERFORMANCE promised by the manufacturer. The reduced airflow led to decreased horsepower, and the fitment was subpar, causing a major hassle during installation. On the positive side, the product did come with clear instructions that were easy to understand. However, the cons outweigh the pros, and I would not recommend this product to anyonSee full review