Touge Techniques / Team BridgeMoto official Time Attack racing manifolds by Walton Motorsports. 

-Material Selection
First and foremost not all 304 Stainless steel is created equal. We carefully select the exact specification of the tube that we use. The use of poor quality tube can compromise the whole design. For Instance, exhaust manifolds experience repeated high-temperature cycles. In these situations, we have seen poor tubing split along the seam.

We design the head flanges inhouse. However, we outsource the precision waterjet cutting. We use waterjet cutting as it results in a more accurate cut over traditional laser cutting

Processes: 
The Mazda 13b Manifold uses a divided Turbo flange. As a result, this allows the manifold primary pipes to remain separate. This negates the need for a collector.
- The process of back purging during welding provides a smoother internal weld. This improves gas flow. Therefore, more power! 

Specifications: 
- Lifetime Weld & Construction Warranty! 
- 304 Stainless steel tube. Working to eliminate the risk of material failure.
- Fully Purged welded. Subsequently improving gas flow leading to increases in power and lowered response times.
- 54.76 Internal Diameter Tube tapering into T3 or V band Flange
Suited for Garrett GTX30/35 and G25-G30 sized turbos
- Curved wastegate port design developed with leading engine tuners to allow high control and remove boost creep.
- 50mm Wastegate Flange
High Wastegate priority allowing for precise turbo control.
- Fully Smoothed Head Ports designed to optimize gas flow. As a result, providing an increase in power and lowered response times.
- Optimized for use with Turbosmart Gen-V Progate 50 Wastegates.