I've been researching on how to do it, and searching for an already made part. I wasn't to be able to adjust my line pressure on the fly. The high line pressure is great for towing and ripping around, but for day to day driving it is a bit much. Anyone know of such a product? One lead I have is a small "ma and pa" company out of California makes such a device, but that's it.

 

what line pressure are you talking about?

fuel line?
injector line?
power steering line?
hydroboost line?
oil line?
coolant line?
brake line?

 

I think he is talking about transmission line pressure

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Or fuel

 

Sorry about that, Transmission.