I have looked everywhere for headers to fit my car, and if anyone makes them i cant find them. I found at JEGS.COM that patriot has 3/8 thick 2 inch tube flanges 737-7834 for 142.99 for 348-409. 17-24 day delivery. With these flanges should i use 1-7/8 or 2 inch tube kit ? Also are the Z11 and 409 exhaust ports the same ? By the way my car is a 23 tbucket. William