I want to do the mod with exhaust branches.
1. Does my engine need to be redone first? (Seems to throw oil from breather)
2. How does polishing the intake help?
3. If you can post the link to your original post with instructions please.
4. Would it help to fit a 5 speed gearbox?
6. Would this modification decrease the engine lifespan?
7. Would the fuel pump and injectors need doing ?