I have found if you can find a welding supply store with a small bottle fill station it only cost $10.00 to fill a full N20 bottle but a speed shop charges way more. I also have filled my paint ball stuff at the welding supply shop for pennies. also if you use a bottle warmer you should get more than 3-4 run on a full bottle also use a pressure gauge.
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89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .
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