Almost every exhaust system uses some form of a merge collector. The key role for this merge collector and the most obvious one is to combine the exhaust pipes of the different cylinder into one tailpipe, which could flow to the turbo or the tailpipe.
The NASCAR Sprint Cup regulations for example make the routing of the exhaust system and its assembly quite a challenge, especially where a reduced weight of the exhaust system is needed while maintaining reliability.
Good Fabs worked with Roger Clark Motorsports' Gobstopper Time Attack cars and developed a custom made and heat-shielded Twin Scroll Inconel manifold finished with White Ceramic Coating to suit a very tight engine bay.
If you want to improve the power output of your engine you need to take into accound the exhaust dynamics and how the exhaust can be tuned to the engine.
In this article, the basic exhaust dynamics in a four stroke spark ignition engine are briefly discussed with a f...