Thread: Headers
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Old 10-03-2012, 12:00 PM   #5
the suicidal eggroll
Scooby Guru
Member#: 51961
Join Date: Jan 2004
Chapter/Region: RMIC
Location: Broomfield, CO
2005 STi
2012 WRX


There was a header shootout a few years ago, where the stock, Grimmspeed ported, and various aftermarket EL and UEL were tested. For the most part, EL and UEL added roughly the same power (about 20whp), and the Grimmspeed ported manifolds and crossover pipe made about half that (about 10whp).
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