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It's the test pipes or high flow cats makes you lose torque down low. That's because the low end torque needs some back pressure while tps and hfcs relief the
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A True Z Fanatic
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It's the test pipes or high flow cats makes you lose torque down low. That's because the low end torque needs some back pressure while tps and hfcs relief the back pressure for peak gains(which is at the higher rpm range).
The solution for this is to get your car tuned. A tune not necessary gain much peak power but will correct the A/F ratio and bring back the power down low thus improve your drivability a couple notch up.
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