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I have a 2017 GT that I’ve upgraded the intake manifold to the GT 350 manifold and 87 mm throttlebody. Throttle response is very sporadic throughout RPM range. It’s like riding a bucking horse. Almost undrivable The only time it seems to run smooth is when I’m wide open throttle. It’s been tuned...

I have a 2017 GT that I’ve upgraded the intake manifold to the GT 350 manifold and 87 mm throttlebody. Throttle response is very sporadic throughout RPM range. It’s like riding a bucking horse. Almost undrivable The only time it seems to run smooth is when I’m wide open throttle. It’s been tuned...