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I'd like to know too please.

So Marco or Bob... ... ... Friday the 16th I loaded the software and dyno'd it that evening. At no point until yesterday did I have any of this timing rattle. All last week nothing, very quiet, every day all the time with morning temps in the mid 20's. Yesterday 26*, I have it BAD at idle...

Thank You Bob. :-laf

Direct from Peter. :D

Well, at least it happened now instead of 3 weeks from now when I was right before or mid-trip to Wyoming. Believe me, that thought has seriously crossed my mind about a set of honed injectors over the last couple days. If they bring up the 4 words "your warranty is void" then it's a no...

Did it again this morning after the Power Service add. :{ Yup, made the phone call. It gets dropped off today for them to fire it up in the morning.

Started doing this Saturday morning and now everytime the truck sits for anything more then 5-6 hrs. Engine also stumbles for 1-2 seconds before it idles like normal. Not a large amount of white but a fair amount. Friday night, I filled up at the same place i always buy fuel from and never had...

Granted, my system is 5" but basically the same muffler specs as a 90544 'cept in a 5" took about 75% of the droan away when towing. Pretty happy now.

Good post, thanks. Been thinking of the same since, at times, I tow in the 18-20k GCVW range. Any noticeable difference in egt's?

Did all three of mine with the same joint a few weeks back at 49k. Center one was shot. Rear one was close. Front was OK but did it anyways.

Steved - Pre FastCoolers at 235* +. What are your temps now with the FC's?

Add me to the list at 49k. Last Friday the center one went out. Rear axle bouncing like a basketball at under 20mph. Replaced all 3 joints with Precision 351's which are a greasable joint. Just for kicks, we ordered a OE joint from a nearby DC dealer. It was much beefier then the original...

Same results for me with aftermarket inj/stock turbo program. EGT's were around 150* higher 2000+ rpm too with that software. Went back to stock/stock program for now. It does seem to be a touch quieter on the rattle then with Stock TM vs. Mild or Moderate TM's which I had been running...

I'd be interested to here your findings on resonator and/or the muffler. I have the same system but without the flex pipe. Same rpm level and much worse when towing. Please post your results. :)

If Byron's talking about the person I think he is, yes, he has Fastcoolers.