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[Fanboy]Grimmspeed or drop-in. No other real choices since G/S came onto the scene.[/Fanboy]
For real, I love mine. G/S are great guys, too.. so there's that. Been running their electronic boost solenoid in my WRX pushing 18psi on the stock TD04 snail for over 7 years, no issues. All of their products are thoughtful, designed to maximum benefit, and made in America. What more could you ask?
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