In the mist of doing a swap in my EK, the guy I got my b16 from gave me an exhaust manifold that i believe came off of an old 2nd gen integra, it has two 1 wire O2 sensors in the header part, and the downpipe is about 2in or so short from mating up to the cat.....now the guy said to just weld in a flex pipe and that should do it, but I really dont like the sound of that...a stock 99-00 SI mani should bolt right up to either end correct? I have a 96 ex coupe