I just installed a True Flow CAI in my 2007 Thunder Road tonight and I was amazed how different the throttle response wasimmediately afterward. This weekend I am doing the first oil change and going with Royal Purple ( Liquid Horse Power ) LOL!!!and on Monday I am having a Magnaflow SI/DO installed and removing the reso's.

It should feel like a totally different truck by noon on Monday. Gonna let itBreath!!!!!!!! I can't wait!!!!!!!!!

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Good lookin' truck man. How much is that Royal Purple gonna run ya?

 

Thanks!! Should be about $8.00 a quart at PEPBOYS. I have used Mobil 1 for years and I checked out Royal Purples website and they had some clips from shows like Trucks and Horse Power TV and it seems like it must be pretty good stuff. Stacy on Trucks changed everything and then dyno'd it and gained HP and TQ.

Don't ask me????? Just Purple oil as far as I know but it must work. Of course I don't have a dyno to check it, but what the hell I need to change the oil so I might as well give it a shot.