Powershifting is when you don't take your foot off the gas at all, while shifting a manual.
Most people agree that a BOV doesn't help performances, but some like that ricey sound.
I'm not familair with the spring trick. Is it seasonal? 
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2004 GT Cruiser Electric Blue, Stage 1, Ghost Flames, Boyd Coddington Smoothies.
Borla Duals, unecessary Airad CAI Thing, 18\" Boyd\'s Smoothies, and she\'s dropped an inch or two.
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