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Originally Posted by Speed Engineering
Laststandard: Has anyone done an X-Pipe like that to see if there are power gains or no?
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Don't know. Mostly a sound thing to ditch the secondary cats. But the Borla 60663 pipes that just delete the secondaries and keep the factory x-pipe are $250-280.. and the 60606 full x-pipe kit is $500-600. I think most other options are in the same price range.
I think there's at least a few people in my situation - I'd like to do long tubes and a tune but don't want to void my warranty. So I'm limited to post primary cats on the exhaust mods.