I have tuned more than 15 obx sidewinder manifolds from ebay all working without a problem. 4 of which Drag the cars at the track for 3 years now and all of the others on the street. Maybe we are the lucky 15 lol. Most of those guys also used the 44 mm ebay $70$ waste gate for years now without problems. Dont hate on the ebay parts they are not all bad. Lets not argue about who spent what just nice to now there are options.
Ur setup is very nice car is so clean. If you need any help overlooking ur tune for a second opinion let me know.
We should have a post to c who has had a obx sidewinder for the k series actually fail and show some pics of the damage. I have never heard of any problems just assumptions that they are bad.
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