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i know this has probably been beat to death and that both headers in question are great headers but any owners LTX's with either TPIS or EM longtubes wish they bought the other header or have dislikes about what they bought??? thanks!!
I just installed EMs yesterday and I can't see how TPiS would be any better. One thing about the EMs is the driver side o2 is to close to the car and was very hard to install. Now this could the same on all headers or they could have placed the bung in the wrong spot, just a 1/2" over and it would have been fine.
Only thing I had to modify was the bolts that hold the brackets for the a/c and alternator. Just radiused them on a bench grinder. But you have to do this with all headers I think. Tpis or EM, are both great choices.