Quote:
Originally Posted by Oburn
Oh ok is there any big difference between EL and EUL headers?
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Biggest difference is the sound. EL is more like a race car UEL is like the traditional Subaru sound. The changes to power and torque vary. UEL can flow better than stock. EL can flow better and be tuned length. The tuning determines where the torque occurs. The P&L and the FA20Club are tuned to improve the torque dip. Ones like the JDL and Super Sprint are more top end tuned. But this is a general overview. Do some googling and you'll see there is a ton of things that go into header design.