We didnt installed the older design headers ourselves. But we sold a few sets at the beginning and had a few customers install them on their Mx-3 and we had very good reviews to confirm the fitment. From there we mentionned that it will fit with minor modifications. As for the new design you can see the installation process on our website, we tested out by ourself and helped for the fitment and design.
Here is a few related Post:
http://www.mx-3.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=15;t=004139
http://www.mx-3.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=15;t=003711
http://www.mx-3.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=15;t=004076
The older design are made for the Mx6 & Probe V6 but can be adapted to fit the Mx3 easily from what we heard.
Here is what a customer mentionned from one of these posts:
"the install went very nicely. I had to grind the flanges a little, to get them to clear the shift linkage and oil pan. But I do think it made a difference in top end power. Yes I did get the one with the egr bung on the wrong side. I just said screw it and plugged it "
"The headers themselves bolted up perfect. But you still had to grind the flanges and bend the y-pipe a little to make it clear the shift linkages, and oil pan. Yeah, i've driven around now with the egr blocked, and everything seems to be fine, no codes or check engine light. I haven't gotten the cat moved back yet so I can't tell you about the sound with the rest of the exhaust hooked up, but i'll let you know this week what its like. Yeah, the O2 sensers all match up fine. On the rear header the O2 senser bung is located on the opposite side of the manifold, compaired to stock. But the O2 sensor wires are plenty long and it doesn't even matter. Other than that. These headers are great, for $170 you can't loose! I started installing the at like 8:00 on friday, and finished at like 3:00 in the morning. But I sat there a long time trying to figure some things out. Go for it guys, they difinatly look better than Pacesetter, and they install easier too. "
"I just installed ssautochrome headers today. The hardest part is the egr line. But I just made a blockoff plate and plugged the line."
Hope this help... About the exchange we were liquidating the older design on ebay due to the few minor problems (EGR not in the right place) and need to grind the flanges... They are not produced anymore since over 2 months.
The new version similar to the "Hotshot" will be ready in approx a month.
Also watch out our new Turbo kit V6 coming out soon. Turbo headers made for the mx3, T3/T4 hybrid turbo, wastegate tial style and blow off valve. Everything you need for your turbo setup.
<small>[ April 16, 2004, 04:13 PM: Message edited by: Street-Import ]</small>