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I'm gonna get the FLP's. They look to be the best exhaust by far. I have my TPIS LT's, Magnaflow X-Pipe and Intermediate pipe portion with cats for sale in the C5 Parts For Sale Section. Great for those who want an entire exhaust from header to the muffler. :D
To be honest, if you already have the TPIS, I think you are wasting time and $$ to swap out - you will probably see no difference in power on the dyno. Both are long tubes and are similar.......the FLP's have the cats/straight pipes which you can fabricate on your existing setup...just my honest opinion......
I like the idea of a completely matched exhaust and I have first hand experience with their work on my brother's '00 WS6. They are second to none. Best header I have ever seen. I know he applied the same effort to these. I wish these were out when I first got my car so I didn't hack all the intermediate pipe up :lol: Also, I like the idea of swappable cats.