I have got a 1989 EF with a B18C1 and just got the cat-back invidia N1 Exhaust for the car. I am trying to find something that will meet between the header (aftermarket) and the exhaust piping. They don't make an invidia test pipe for that chassis. Basically I am looking to see what other people are running. I don't want the muffler shop to weld some half assed fence post pipe between the two. I would prefer to have something in stainless to match the rest of the piping. Invidia does have some test pipes for the DC2 LS & GSR and EK. I want to run a test pipe since this car is for racing and it does not have to meet smog regulations.