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And in the process deleted the AIV and the PRVR systems. All went well except for an unexpected sound coming from the down pipe/test pipe area. It's a mechanical, metalic sounds alsmost seems like you can here the turbo's work. It's higher pitched, and a little ennoying. I checked all the nuts and botls on the test pipes, and they are very tight. I also used brand new gaskets on each end. I thought it might be air leaking out where the test pipe connects to the down pipe, but it's unlikely.Does anyone have any idea if this is normal/expected? The test pipes are Edge Racing 2.4" from CZP so are the gaskets. The catback exhaust is HKS Hi-Power, and the downpipes are Z1. Thanks!!
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