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Discussion Starter · #1 ·
anybody recommend what size downpipe (from stock) to go with, and should it be with an external wastegate or without?
 

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THDP comes with an integrated wastegate puck and it replaces your stock elbow and downpipe. Works great on cars from bone stock to 10 seconds.
 

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I ran a stock downpipe down to low 12's on a stock motor. What is the rest of your combo. Money may be spend more wisely elsewhere. Do the downpipe when performance requires it.
 
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