Quote:
Originally Posted by XanRules
I'm from the old school of thought that suggests that 2.5" is optimal for an N/A Subaru engine. However, based on the little bit of reading I'm doing, that appears to no longer be the case.
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Ah, that makes sense. From what we have found in our dyno tests, the 3" systems made more power over our 2.5" systems. Granted, it wasn't this massive 20WHP, but it was a difference.