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Discussion Starter #1
Just wondering when its time to upgrade header size on turbo setups. Ive got a 1 5/8's setup now with 2.5" crossover and im thinking about going to 1 3/4's with a 3" crossover. Going for around 800-900 to the wheels with a s380r on E85.
 

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Do a search for Turbocharging 102 in Trash or Be Trashed. I think your header/crossover sizes are fine :)
 

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theres about 8 million posts in that thread, so to save you some time ill ask the question everyone else will want to know, and that is:

What are the exhaust port dimensions, cubes, rpm etc etc.
 

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Discussion Starter #5
306 sbf,AFR 205's, custom Turbo cam,super Victor efi, not Sure about rpms.
 
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