Cold start test pipe rattle

RanRich · 07-11-2017, 03:54 PM

I have a used set of Fast Intentions RTP's (~10K miles) mated to a custom catback, pictured below, and for the first 5-10 minutes of every drive I have to keep the car under 2500rpm or else I experience a metallic-y rattle sound coming from the test pipe area. Once the exhaust is good and hot it goes away, but on a cold start it sounds like trash.

The resonators on each of the test pipes had a gash in the perforated pipe, and you could hear the packing was a bit loose in one of them before they were installed, but I figured this wouldn't be a problem. Are all test pipes or resonated test pipes like this? I know what rasp sounds like and this is more tinny and metallic, so that can't be it.

Looking for some input.

07-11-2017, 03:54 PM	#1 (permalink)
RanRich Enthusiast Member Join Date: Mar 2015 Location: St. Louis Posts: 425 Drives: 09 PG Sport M6 Rep Power: 3373	Cold start test pipe rattle I have a used set of Fast Intentions RTP's (~10K miles) mated to a custom catback, pictured below, and for the first 5-10 minutes of every drive I have to keep the car under 2500rpm or else I experience a metallic-y rattle sound coming from the test pipe area. Once the exhaust is good and hot it goes away, but on a cold start it sounds like trash. The resonators on each of the test pipes had a gash in the perforated pipe, and you could hear the packing was a bit loose in one of them before they were installed, but I figured this wouldn't be a problem. Are all test pipes or resonated test pipes like this? I know what rasp sounds like and this is more tinny and metallic, so that can't be it. Looking for some input. __________________ AAM \| Dynosty \| Ecutek \| Eibach \| Hawk \| H&R \| Nismo \| Stillen \| Stoptech \| Z1

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