Redline is a brand name you could look it up at summit racing or amazon, all their stuff is great , tried so far the shockproof gear oil ,the red bearing grease, the regular gear oil and the water wetter, which helps your engine transfer heat better to the coolant, also their regular motor oils are very good also , i think seem to remember one of the magazines i think it was muscle mustangs and fast fords, dyno testing and getting around 5 or more hp difference using their products, quite a bit for an oil change, but my own testing of just their gear oil is definitely noticable increase, weathers a bit variable now with the winds on my route and temps and all but truck feels livelier without a doubt.
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