Tubular Manifold Tri-Y Exhaust Header for Buick Regal (1984-1985) with 3.8L V6 Turbo EngineHigh Velocity Tubular Tri Y Exhaust Headers for the Buick 3. 8L Turbo (LD5) Who Its For: Engineered for 1984 1985 Buick Regal owners running the legendary 3. 8L Turbocharged V6 powerplant who are ready to eliminate the bottleneck of restrictive, crack prone factory manifolds. The Symptom: The factory exhaust manifolds on the early hot air 3. 8L Turbo engines were designed with tight tolerances and heavy cast materials that are notorious for heat soak