The rpm Range would be around 3,000 to about 4,500.Yes it is hi hp a15 80hp! Does it need to be equal lenght for street?And what size does the colloctor pipe has to be? What size does the runners usually be.
I want to upgrade to a extractor on my a15 i want to know what sizes the pipers are to be,It will be for a streeter i'm using bigger cabby 32/36.Does the collector size has to be presice or important? Changing to 1 3/4 after the extractor to the back of the car I dont want to get it made like #OOPS# an i could have got it done better.What are your suggestions and tips