Quote:
Originally Posted by A1337STI
Rally rules require a 34mm restrictor on a single turbo Or
22mm restrictors if you use dual turbos (not sequential, but side by side )
which is going to flow more air ?
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(2) x 22mm diameter is roughly equivalent to (1) x 31mm area-wise, so if I had to guess I would say 34mm flows better (approx. 20%).