The exhaust pattern may fit but the ports are different shape. I have the same deal but I have old race W2s. I have heard you can grind the headers to make them match the port. I never attempted such nonsense myself. Just got TTI W2 headers for the LA pattern. Maybe you could call them and see if they'll put an LA style flange on their 1 7/8 headers for you? I have the 1 3/4 step headers myself.
If they agree to do so let us know. I'd be interested in a set myself.