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 IN STOCK 77-14003Silver Bullet throttle body spacers create turbulence in the air flow at the point just prior entry into the engine increasing horsepower, torque and improving throttle response and fuel efficiency. Silver Bullet throttle body spacers are constructed out of durable T-6061 billet aluminum and using ... aFe Power Sprint Booster Power Converter 07-17 GM Trucks V6/V8 (AT) 2016-2023 GMC Yukon XL SLE / SLT 2021-2023 GMC Yukon XL AT4 $277.86 SALE |