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Discussion Starter #1
What size exhaust for pro mod 88's ?
 

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You'll get ALOT of different opinions but IMO with the 540 and twin 88's I'd use 2 1/4 primaries and 3 1/2" collectors.
 

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Discussion Starter #5
Sorry should of been more specific. What size tubing exiting the turbo. 4" or 5 "
I have 2" primary headers.
 

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Which ever size pipe is at least 15 percent bigger than the exducer of your turbine wheel. Btw, the best exhaust for a turbo car is no exhaust. Put the biggest pipe you can fit.
 
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