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Originally Posted by 2K3_Boxster_S
NHP exhaust is fully bolted up.
All four muffler clamps that connect the U pieces from the Mids to the rear exhaust LEAK!. THERE SUPPLIED CLAMP IS GARBAGE, and you re-use 2 of the OEM sleeve clamps which also leak. $2k the exhaust should not leak anywhere.
Next: they guarantee no CELS because all 4 O2's are reconnected. Wrong, after about 100 miles. now throwing a CEL, going to check it tommorow OBII scanner. almost sure it is going to say O2. will see.
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2K3_Boxster_S:
I just recently bolted up the same system on my 2.7. Since the only parts to be reused were the double sleeve clamps, and mine tightened/loosened like crap a couple of years ago when I put on my first aftermarket muffler, I opted to install new ones. They are part # 996-111-110-01 that list for $32.50 and I was charged $22.24 by my local dealer. Do your double clamps have the wedges in them? Did you remove them? My new clamps didn't have them installed but the old clamps did I believe. Removing the wedges allows the clamps to be torqued down tighter and is in the instructions for the mid-pipe installation.
I did use the clamps NHP supplied from the U-pipe to the muffler. Again, I removed the wedges in the clamps and torqued them really tightly. I don't believe the instructions mention removing the wedges on these clamps but I did so anyway.
I've driven my car ~ 220 miles (including 70 miles this morning) and thus far no leaks and no CEL. I hope my luck continues.
I hope you get your problems sorted soon and I like many other are looking forward to your dyno results. My
un-calibrated butt dyno tells me there is a marginal gain from the exhaust and BMC filter I installed on my 2.7. I believe I need an ECU flash to really feel the benefits and that is down the road.
Best of luck and let us know how it all turns out.
Boxtaboy,
I believe the u-pipes are slightly different and therefore not interchangeable.
ddb