Custom 3.5” External Wastegate Downpipe

💎 RARE CUSTOM PIECE – BUILT BY A WELL-KNOWN TURBO BUICK SPECIALIST IN GEORGIA!
If you're running an external wastegate setup off your headers and need a clean, smooth-flowing 3.5" downpipe for your Turbo Buick, this is the one.

🛠️ This is a custom-fabricated 3.5” stainless steel downpipe with beautiful welds and solid construction throughout. Designed without an internal puck, the wastegate port is already blocked off and sealed on the pipe itself. That means no block-off flange is needed—just bolt it straight to your turbo and go. All you need is a compatible external wastegate on your header (not included).

Inner fender will need to be trimmed to clear. 

🔍 Condition: Used but in excellent shape, very few miles on it. A bit of surface discoloration from heat cycles, but overall it’s clean and ready to install.

✅ Built by Josh White (Georgia Automotive Performance)
✅ 3.5" Mandrel Bent Stainless Design – Free-flowing power
✅ No Internal Puck – Already sealed at the pipe
✅ External Wastegate Header Setup REQUIRED
✅ Turbo Flange + O2 Bung Welded
✅ Fits 1986–1987 Buick Grand National / Turbo Regal
✅ One-off Custom Piece – Very limited availability

🟢 Product Tier: Green Dot – Solid, Used Part with Verified Functionality