I had that design header on my car. Hated it, but I bought it due to my capped off secondary air solenoid pipe blowing off my car. So for a cheap replacement, I guess it was ok. I never had the slip joint leak, though. Instead, I had to use a hammer and screwdriver to seperate the two halves. I did get a used Greddy header from Tim and the quality of the product was evident the moment I put it on. Plus, the exhaust note deepened a little. I just developed a small leak at the flange to pipe weld on cylinder 3.