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      03-16-2009, 01:31 PM   #9
kyleb350
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Drives: '21 X3MC
Join Date: Jun 2008
Location: Milwaukee

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Quote:
Originally Posted by Gen_E92 View Post
+1

If you simply slip the RR midpipes OVER the stock pipes, I'm 99% sure it's leaking ...the RR pipes are 2.5" and stock pipes are 2.25", no way clamps can seal this kind of connection w/o welding...correct me if I'm wrong.

I'm running on RR midpipes too...what I did was use exhaust reducers that's 2.25" on one end and 2.5" on the other. The 2.25" end was welded to the stock pipes, and the RR midpipes can simply slip INTO (not OVER, which has much bigger chance of leaking) the 2.5" ID end and clamp them. Obviously I didn't weld the RR midpipes b/c I'll be selling them in the future.
Wow. That explains my whole debacle when I got these things installed on my car. I bought the ceramic coated ones and had them installed. On my drive home, I had a leak. I took it back to get it adjusted, and the shop blamed it on the catback system I had. I replied that I didn't have a problem with them connected to the stock secondary cat pipes. To fix it, they welded it, which made me , then I
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